/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 00:43:41,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 00:43:41,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 00:43:41,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 00:43:41,671 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 [2022-02-11 00:43:41,683 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 00:43:41,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 00:43:41,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 00:43:41,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 00:43:41,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 00:43:41,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 00:43:41,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 00:43:41,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 00:43:41,686 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 00:43:41,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 00:43:41,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 00:43:41,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 00:43:41,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 00:43:41,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 00:43:41,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 00:43:41,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 00:43:41,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:43:41,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 00:43:41,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 00:43:41,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 00:43:41,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 00:43:41,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 00:43:41,689 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 00:43:41,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 00:43:41,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 00:43:41,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 00:43:41,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 00:43:41,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 00:43:41,893 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 00:43:41,894 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 00:43:41,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl [2022-02-11 00:43:41,895 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2022-02-11 00:43:41,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 00:43:41,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 00:43:41,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 00:43:41,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 00:43:41,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 00:43:41,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,930 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 00:43:41,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 00:43:41,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 00:43:41,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 00:43:41,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 00:43:41,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 00:43:41,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 00:43:41,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 00:43:41,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 00:43:41,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/1) ... [2022-02-11 00:43:41,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:43:41,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:41,962 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) [2022-02-11 00:43:41,973 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 [2022-02-11 00:43:41,988 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 00:43:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 00:43:41,988 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 00:43:41,988 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 00:43:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 00:43:41,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 00:43:41,989 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 00:43:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 00:43:41,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 00:43:41,989 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 00:43:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 00:43:41,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 00:43:41,989 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-02-11 00:43:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-02-11 00:43:41,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-02-11 00:43:41,990 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 00:43:42,023 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 00:43:42,024 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 00:43:42,130 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 00:43:42,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 00:43:42,149 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-11 00:43:42,149 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-02-11 00:43:42,149 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-02-11 00:43:42,150 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2022-02-11 00:43:42,151 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:43:42 BoogieIcfgContainer [2022-02-11 00:43:42,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 00:43:42,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 00:43:42,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 00:43:42,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 00:43:42,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:43:41" (1/2) ... [2022-02-11 00:43:42,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bca68ef and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 12:43:42, skipping insertion in model container [2022-02-11 00:43:42,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:43:42" (2/2) ... [2022-02-11 00:43:42,161 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2022-02-11 00:43:42,166 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 00:43:42,166 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 00:43:42,166 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 00:43:42,166 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 00:43:42,226 INFO L148 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-02-11 00:43:42,283 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 00:43:42,289 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 [2022-02-11 00:43:42,289 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-02-11 00:43:42,298 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2022-02-11 00:43:42,338 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:43:42,349 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:42,350 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:42,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1639101113, now seen corresponding path program 1 times [2022-02-11 00:43:42,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:42,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875101511] [2022-02-11 00:43:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:42,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:42,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:42,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875101511] [2022-02-11 00:43:42,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875101511] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:42,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:42,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:43:42,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950395612] [2022-02-11 00:43:42,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:42,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:43:42,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:43:42,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:43:42,554 INFO L87 Difference]: Start difference. First operand has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:42,638 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2022-02-11 00:43:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:43:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:43:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:42,647 INFO L225 Difference]: With dead ends: 253 [2022-02-11 00:43:42,648 INFO L226 Difference]: Without dead ends: 247 [2022-02-11 00:43:42,649 INFO L933 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 [2022-02-11 00:43:42,651 INFO L934 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:42,652 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 9 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-11 00:43:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2022-02-11 00:43:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2022-02-11 00:43:42,709 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2022-02-11 00:43:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:42,710 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2022-02-11 00:43:42,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2022-02-11 00:43:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:43:42,711 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:42,711 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:42,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 00:43:42,712 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash -852565589, now seen corresponding path program 2 times [2022-02-11 00:43:42,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:42,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141373253] [2022-02-11 00:43:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:42,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:42,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:42,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141373253] [2022-02-11 00:43:42,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141373253] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:42,755 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:42,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:43:42,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74172381] [2022-02-11 00:43:42,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:42,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:43:42,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:43:42,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:43:42,757 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:42,854 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2022-02-11 00:43:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:43:42,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:43:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:42,857 INFO L225 Difference]: With dead ends: 262 [2022-02-11 00:43:42,857 INFO L226 Difference]: Without dead ends: 256 [2022-02-11 00:43:42,857 INFO L933 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 [2022-02-11 00:43:42,858 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:42,858 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-11 00:43:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2022-02-11 00:43:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.923611111111111) internal successors, (421), 144 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2022-02-11 00:43:42,876 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2022-02-11 00:43:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:42,876 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2022-02-11 00:43:42,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2022-02-11 00:43:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:42,877 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:42,877 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:42,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 00:43:42,878 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:42,878 INFO L85 PathProgramCache]: Analyzing trace with hash 105140105, now seen corresponding path program 1 times [2022-02-11 00:43:42,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:42,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773856536] [2022-02-11 00:43:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:42,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:42,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:42,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773856536] [2022-02-11 00:43:42,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773856536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:42,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696082591] [2022-02-11 00:43:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:42,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:42,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:42,935 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) [2022-02-11 00:43:42,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 00:43:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:42,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:43:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:43,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:43,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696082591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:43,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:43,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 00:43:43,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272487326] [2022-02-11 00:43:43,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:43,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:43:43,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:43,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:43:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:43:43,112 INFO L87 Difference]: Start difference. First operand 145 states and 421 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2022-02-11 00:43:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:43,204 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2022-02-11 00:43:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:43:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 18 [2022-02-11 00:43:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:43,207 INFO L225 Difference]: With dead ends: 199 [2022-02-11 00:43:43,207 INFO L226 Difference]: Without dead ends: 199 [2022-02-11 00:43:43,208 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:43:43,211 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:43,212 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 42 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-11 00:43:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2022-02-11 00:43:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0067567567567566) internal successors, (445), 148 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2022-02-11 00:43:43,232 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2022-02-11 00:43:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:43,233 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2022-02-11 00:43:43,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2022-02-11 00:43:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2022-02-11 00:43:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:43,237 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:43,237 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:43,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:43,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:43,438 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1032435817, now seen corresponding path program 1 times [2022-02-11 00:43:43,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:43,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107280821] [2022-02-11 00:43:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:43,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:43,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:43,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107280821] [2022-02-11 00:43:43,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107280821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:43,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:43,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:43:43,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173316660] [2022-02-11 00:43:43,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:43,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:43:43,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:43:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:43:43,480 INFO L87 Difference]: Start difference. First operand 149 states and 445 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:43,572 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2022-02-11 00:43:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:43:43,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-11 00:43:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:43,576 INFO L225 Difference]: With dead ends: 246 [2022-02-11 00:43:43,576 INFO L226 Difference]: Without dead ends: 214 [2022-02-11 00:43:43,577 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:43:43,583 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:43,583 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 41 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-11 00:43:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2022-02-11 00:43:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.901840490797546) internal successors, (473), 163 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2022-02-11 00:43:43,594 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2022-02-11 00:43:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:43,594 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2022-02-11 00:43:43,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:43,594 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2022-02-11 00:43:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:43,596 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:43,596 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:43,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-11 00:43:43,596 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:43,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:43,597 INFO L85 PathProgramCache]: Analyzing trace with hash 973094452, now seen corresponding path program 1 times [2022-02-11 00:43:43,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:43,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860630334] [2022-02-11 00:43:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:43,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:43,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:43,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860630334] [2022-02-11 00:43:43,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860630334] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:43,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:43,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:43:43,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116589575] [2022-02-11 00:43:43,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:43,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 00:43:43,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 00:43:43,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:43:43,622 INFO L87 Difference]: Start difference. First operand 164 states and 473 transitions. 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) [2022-02-11 00:43:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:43,644 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2022-02-11 00:43:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 00:43:43,644 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 [2022-02-11 00:43:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:43,645 INFO L225 Difference]: With dead ends: 153 [2022-02-11 00:43:43,645 INFO L226 Difference]: Without dead ends: 137 [2022-02-11 00:43:43,650 INFO L933 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 [2022-02-11 00:43:43,651 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:43,651 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:43:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-11 00:43:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2022-02-11 00:43:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.7954545454545454) internal successors, (369), 132 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2022-02-11 00:43:43,655 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2022-02-11 00:43:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:43,655 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2022-02-11 00:43:43,655 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) [2022-02-11 00:43:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2022-02-11 00:43:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:43,655 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:43,656 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:43,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-11 00:43:43,656 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:43,656 INFO L85 PathProgramCache]: Analyzing trace with hash 804217187, now seen corresponding path program 2 times [2022-02-11 00:43:43,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:43,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668360965] [2022-02-11 00:43:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:43,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:43,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668360965] [2022-02-11 00:43:43,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668360965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:43,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542832990] [2022-02-11 00:43:43,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:43:43,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:43,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:43,681 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) [2022-02-11 00:43:43,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 00:43:43,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:43:43,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:43,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:43:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:43,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:43,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542832990] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:43,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:43,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-11 00:43:43,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130768363] [2022-02-11 00:43:43,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:43,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:43:43,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:43:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:43:43,835 INFO L87 Difference]: Start difference. First operand 133 states and 369 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:43,907 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2022-02-11 00:43:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:43:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:43:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:43,908 INFO L225 Difference]: With dead ends: 205 [2022-02-11 00:43:43,908 INFO L226 Difference]: Without dead ends: 205 [2022-02-11 00:43:43,909 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:43:43,909 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:43,909 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-11 00:43:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2022-02-11 00:43:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.837037037037037) internal successors, (383), 135 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2022-02-11 00:43:43,914 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2022-02-11 00:43:43,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:43,914 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2022-02-11 00:43:43,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2022-02-11 00:43:43,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:43,915 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:43,915 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:43,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-11 00:43:44,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-02-11 00:43:44,123 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash 26248067, now seen corresponding path program 2 times [2022-02-11 00:43:44,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:44,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562810081] [2022-02-11 00:43:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:44,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:44,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562810081] [2022-02-11 00:43:44,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562810081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:44,150 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:44,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:43:44,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067091946] [2022-02-11 00:43:44,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:44,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:43:44,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:43:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:43:44,151 INFO L87 Difference]: Start difference. First operand 136 states and 383 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:44,247 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2022-02-11 00:43:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:43:44,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-11 00:43:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:44,248 INFO L225 Difference]: With dead ends: 253 [2022-02-11 00:43:44,248 INFO L226 Difference]: Without dead ends: 244 [2022-02-11 00:43:44,249 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:43:44,251 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:44,251 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 39 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:44,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-11 00:43:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2022-02-11 00:43:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.811320754716981) internal successors, (447), 159 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2022-02-11 00:43:44,257 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2022-02-11 00:43:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:44,257 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2022-02-11 00:43:44,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2022-02-11 00:43:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:44,258 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:44,258 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:44,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-11 00:43:44,258 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash -738712767, now seen corresponding path program 3 times [2022-02-11 00:43:44,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:44,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593840116] [2022-02-11 00:43:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:44,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:44,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:44,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593840116] [2022-02-11 00:43:44,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593840116] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:44,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:44,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:43:44,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060791448] [2022-02-11 00:43:44,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:44,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:43:44,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:43:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:43:44,293 INFO L87 Difference]: Start difference. First operand 160 states and 447 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:44,365 INFO L93 Difference]: Finished difference Result 193 states and 523 transitions. [2022-02-11 00:43:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:43:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-11 00:43:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:44,367 INFO L225 Difference]: With dead ends: 193 [2022-02-11 00:43:44,367 INFO L226 Difference]: Without dead ends: 193 [2022-02-11 00:43:44,367 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:43:44,368 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:44,369 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-11 00:43:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2022-02-11 00:43:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2022-02-11 00:43:44,374 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 18 [2022-02-11 00:43:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:44,375 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2022-02-11 00:43:44,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2022-02-11 00:43:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:44,377 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:44,377 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:44,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-11 00:43:44,377 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:44,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:44,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1491858461, now seen corresponding path program 3 times [2022-02-11 00:43:44,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:44,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89771438] [2022-02-11 00:43:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:44,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:44,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:44,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89771438] [2022-02-11 00:43:44,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89771438] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:44,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:44,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:43:44,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492325855] [2022-02-11 00:43:44,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:44,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:43:44,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:44,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:43:44,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:43:44,418 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:44,481 INFO L93 Difference]: Finished difference Result 193 states and 512 transitions. [2022-02-11 00:43:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:43:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-11 00:43:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:44,483 INFO L225 Difference]: With dead ends: 193 [2022-02-11 00:43:44,484 INFO L226 Difference]: Without dead ends: 190 [2022-02-11 00:43:44,484 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:43:44,485 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:44,486 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 34 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:43:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-11 00:43:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2022-02-11 00:43:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2022-02-11 00:43:44,490 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2022-02-11 00:43:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:44,491 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2022-02-11 00:43:44,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2022-02-11 00:43:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:44,492 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:44,492 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:44,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-11 00:43:44,492 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:44,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1888362025, now seen corresponding path program 4 times [2022-02-11 00:43:44,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:44,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874656087] [2022-02-11 00:43:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:44,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:44,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:44,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874656087] [2022-02-11 00:43:44,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874656087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:44,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983277426] [2022-02-11 00:43:44,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:43:44,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:44,541 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) [2022-02-11 00:43:44,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 00:43:44,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:43:44,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:44,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:43:44,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:44,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:44,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983277426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:44,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:44,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-11 00:43:44,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017165955] [2022-02-11 00:43:44,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:44,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:43:44,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:44,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:43:44,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:43:44,675 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:44,738 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2022-02-11 00:43:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:43:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:43:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:44,739 INFO L225 Difference]: With dead ends: 193 [2022-02-11 00:43:44,739 INFO L226 Difference]: Without dead ends: 193 [2022-02-11 00:43:44,739 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:43:44,739 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:44,740 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-11 00:43:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2022-02-11 00:43:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2022-02-11 00:43:44,772 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2022-02-11 00:43:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:44,772 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2022-02-11 00:43:44,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2022-02-11 00:43:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:44,776 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:44,776 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:44,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:44,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:44,977 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:44,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:44,978 INFO L85 PathProgramCache]: Analyzing trace with hash 978830285, now seen corresponding path program 4 times [2022-02-11 00:43:44,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:44,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955727652] [2022-02-11 00:43:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:44,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:44,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:44,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955727652] [2022-02-11 00:43:44,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955727652] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:44,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:44,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:43:44,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114779482] [2022-02-11 00:43:44,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:44,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:43:44,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:43:44,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:43:44,997 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:45,069 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2022-02-11 00:43:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:43:45,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-11 00:43:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:45,070 INFO L225 Difference]: With dead ends: 197 [2022-02-11 00:43:45,070 INFO L226 Difference]: Without dead ends: 188 [2022-02-11 00:43:45,071 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:43:45,071 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:45,071 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 36 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:45,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-11 00:43:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2022-02-11 00:43:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2022-02-11 00:43:45,075 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2022-02-11 00:43:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:45,075 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2022-02-11 00:43:45,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2022-02-11 00:43:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:45,076 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:45,076 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:45,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-11 00:43:45,076 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash 354089523, now seen corresponding path program 5 times [2022-02-11 00:43:45,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:45,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410447326] [2022-02-11 00:43:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:45,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:45,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410447326] [2022-02-11 00:43:45,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410447326] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:45,105 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:45,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:43:45,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932684550] [2022-02-11 00:43:45,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:45,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:43:45,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:43:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:43:45,106 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:45,177 INFO L93 Difference]: Finished difference Result 190 states and 506 transitions. [2022-02-11 00:43:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:43:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-11 00:43:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:45,178 INFO L225 Difference]: With dead ends: 190 [2022-02-11 00:43:45,179 INFO L226 Difference]: Without dead ends: 190 [2022-02-11 00:43:45,179 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:43:45,179 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:45,179 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:45,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-11 00:43:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2022-02-11 00:43:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2022-02-11 00:43:45,183 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2022-02-11 00:43:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:45,183 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2022-02-11 00:43:45,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2022-02-11 00:43:45,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:45,184 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:45,184 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:45,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-11 00:43:45,184 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:45,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1710306545, now seen corresponding path program 5 times [2022-02-11 00:43:45,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:45,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270257578] [2022-02-11 00:43:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:45,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:45,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270257578] [2022-02-11 00:43:45,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270257578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:45,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:45,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:43:45,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105561291] [2022-02-11 00:43:45,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:45,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:43:45,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:43:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:43:45,201 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:45,285 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2022-02-11 00:43:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:43:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-11 00:43:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:45,287 INFO L225 Difference]: With dead ends: 248 [2022-02-11 00:43:45,287 INFO L226 Difference]: Without dead ends: 245 [2022-02-11 00:43:45,287 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:43:45,287 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:45,288 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 58 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-11 00:43:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 161. [2022-02-11 00:43:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.775) internal successors, (444), 160 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2022-02-11 00:43:45,291 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2022-02-11 00:43:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:45,292 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2022-02-11 00:43:45,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2022-02-11 00:43:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:45,292 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:45,292 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:45,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-11 00:43:45,292 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash 759478481, now seen corresponding path program 6 times [2022-02-11 00:43:45,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:45,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936510663] [2022-02-11 00:43:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:45,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:45,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936510663] [2022-02-11 00:43:45,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936510663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:45,309 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:45,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:43:45,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056156847] [2022-02-11 00:43:45,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:45,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:43:45,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:45,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:43:45,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:43:45,310 INFO L87 Difference]: Start difference. First operand 161 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:45,373 INFO L93 Difference]: Finished difference Result 178 states and 466 transitions. [2022-02-11 00:43:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:43:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-11 00:43:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:45,374 INFO L225 Difference]: With dead ends: 178 [2022-02-11 00:43:45,374 INFO L226 Difference]: Without dead ends: 178 [2022-02-11 00:43:45,374 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:43:45,375 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:45,375 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 40 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:43:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-11 00:43:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2022-02-11 00:43:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.798507462686567) internal successors, (375), 134 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 375 transitions. [2022-02-11 00:43:45,378 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 375 transitions. Word has length 18 [2022-02-11 00:43:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:45,378 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 375 transitions. [2022-02-11 00:43:45,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 375 transitions. [2022-02-11 00:43:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:43:45,378 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:45,379 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:45,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-11 00:43:45,379 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:45,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:45,379 INFO L85 PathProgramCache]: Analyzing trace with hash 631984787, now seen corresponding path program 6 times [2022-02-11 00:43:45,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:45,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725008778] [2022-02-11 00:43:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:45,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:45,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725008778] [2022-02-11 00:43:45,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725008778] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:43:45,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:43:45,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:43:45,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983463668] [2022-02-11 00:43:45,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:43:45,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:43:45,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:45,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:43:45,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:43:45,396 INFO L87 Difference]: Start difference. First operand 135 states and 375 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:45,451 INFO L93 Difference]: Finished difference Result 139 states and 378 transitions. [2022-02-11 00:43:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:43:45,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-11 00:43:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:45,452 INFO L225 Difference]: With dead ends: 139 [2022-02-11 00:43:45,452 INFO L226 Difference]: Without dead ends: 135 [2022-02-11 00:43:45,453 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:43:45,453 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:45,453 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 42 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:43:45,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-11 00:43:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-02-11 00:43:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 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) [2022-02-11 00:43:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2022-02-11 00:43:45,456 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2022-02-11 00:43:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:45,456 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2022-02-11 00:43:45,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-11 00:43:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2022-02-11 00:43:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:43:45,456 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:45,456 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:45,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-11 00:43:45,457 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:45,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2083966421, now seen corresponding path program 1 times [2022-02-11 00:43:45,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:45,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836894762] [2022-02-11 00:43:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:45,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:45,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836894762] [2022-02-11 00:43:45,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836894762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:45,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818324647] [2022-02-11 00:43:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:45,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:45,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:45,556 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) [2022-02-11 00:43:45,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 00:43:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:45,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:43:45,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:45,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:43:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:45,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:45,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:43:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:45,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:43:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818324647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:45,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:45,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-02-11 00:43:45,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529637431] [2022-02-11 00:43:45,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:45,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:43:45,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:43:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:43:45,893 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:46,268 INFO L93 Difference]: Finished difference Result 374 states and 1062 transitions. [2022-02-11 00:43:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:43:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:43:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:46,270 INFO L225 Difference]: With dead ends: 374 [2022-02-11 00:43:46,270 INFO L226 Difference]: Without dead ends: 364 [2022-02-11 00:43:46,270 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:43:46,270 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 125 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:46,270 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 44 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 614 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-02-11 00:43:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-11 00:43:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 186. [2022-02-11 00:43:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8162162162162163) internal successors, (521), 185 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2022-02-11 00:43:46,275 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2022-02-11 00:43:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:46,276 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2022-02-11 00:43:46,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2022-02-11 00:43:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:43:46,277 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:46,277 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:46,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:46,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-11 00:43:46,487 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1077905909, now seen corresponding path program 2 times [2022-02-11 00:43:46,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:46,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406959560] [2022-02-11 00:43:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:46,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:46,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:46,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406959560] [2022-02-11 00:43:46,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406959560] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:46,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039745504] [2022-02-11 00:43:46,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:43:46,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:46,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:46,606 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) [2022-02-11 00:43:46,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 00:43:46,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:43:46,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:46,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:43:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:46,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:46,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:43:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:46,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:47,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:47,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-02-11 00:43:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:47,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039745504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:47,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:47,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-11 00:43:47,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477875623] [2022-02-11 00:43:47,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:47,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:43:47,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:47,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:43:47,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:43:47,420 INFO L87 Difference]: Start difference. First operand 186 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:48,799 INFO L93 Difference]: Finished difference Result 575 states and 1655 transitions. [2022-02-11 00:43:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:43:48,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:43:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:48,801 INFO L225 Difference]: With dead ends: 575 [2022-02-11 00:43:48,801 INFO L226 Difference]: Without dead ends: 556 [2022-02-11 00:43:48,802 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:43:48,802 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 291 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:48,802 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 89 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 953 Invalid, 0 Unknown, 963 Unchecked, 0.4s Time] [2022-02-11 00:43:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-02-11 00:43:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 210. [2022-02-11 00:43:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.8325358851674642) internal successors, (592), 209 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 592 transitions. [2022-02-11 00:43:48,810 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 592 transitions. Word has length 20 [2022-02-11 00:43:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:48,810 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 592 transitions. [2022-02-11 00:43:48,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 592 transitions. [2022-02-11 00:43:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:43:48,811 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:48,811 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:48,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:49,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-11 00:43:49,025 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:49,025 INFO L85 PathProgramCache]: Analyzing trace with hash 800910909, now seen corresponding path program 3 times [2022-02-11 00:43:49,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:49,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757069514] [2022-02-11 00:43:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:49,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:49,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:49,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757069514] [2022-02-11 00:43:49,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757069514] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:49,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008627628] [2022-02-11 00:43:49,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:43:49,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:49,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:49,105 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) [2022-02-11 00:43:49,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 00:43:49,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:43:49,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:49,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:43:49,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:49,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:49,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:43:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:49,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:49,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:49,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-02-11 00:43:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:49,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008627628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:49,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:49,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-11 00:43:49,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103453562] [2022-02-11 00:43:49,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:49,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:43:49,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:49,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:43:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:43:49,796 INFO L87 Difference]: Start difference. First operand 210 states and 592 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:51,960 INFO L93 Difference]: Finished difference Result 621 states and 1767 transitions. [2022-02-11 00:43:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:43:51,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:43:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:51,962 INFO L225 Difference]: With dead ends: 621 [2022-02-11 00:43:51,962 INFO L226 Difference]: Without dead ends: 591 [2022-02-11 00:43:51,964 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=882, Invalid=4520, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:43:51,964 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 319 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:51,964 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 69 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1137 Invalid, 0 Unknown, 495 Unchecked, 0.6s Time] [2022-02-11 00:43:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-02-11 00:43:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 227. [2022-02-11 00:43:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.849557522123894) internal successors, (644), 226 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 644 transitions. [2022-02-11 00:43:51,970 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 644 transitions. Word has length 20 [2022-02-11 00:43:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:51,970 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 644 transitions. [2022-02-11 00:43:51,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 644 transitions. [2022-02-11 00:43:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:43:51,971 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:51,971 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:51,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-11 00:43:52,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-11 00:43:52,183 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash -32827531, now seen corresponding path program 4 times [2022-02-11 00:43:52,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:52,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631845160] [2022-02-11 00:43:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:52,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:52,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:52,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631845160] [2022-02-11 00:43:52,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631845160] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:52,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942923934] [2022-02-11 00:43:52,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:43:52,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:52,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:52,262 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) [2022-02-11 00:43:52,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 00:43:52,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:43:52,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:52,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:43:52,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:52,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:52,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:43:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:52,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:52,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:52,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:43:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:52,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:43:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:52,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942923934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:52,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:52,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:43:52,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654148059] [2022-02-11 00:43:52,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:52,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:43:52,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:52,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:43:52,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:43:52,565 INFO L87 Difference]: Start difference. First operand 227 states and 644 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:52,826 INFO L93 Difference]: Finished difference Result 334 states and 957 transitions. [2022-02-11 00:43:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:43:52,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:43:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:52,828 INFO L225 Difference]: With dead ends: 334 [2022-02-11 00:43:52,828 INFO L226 Difference]: Without dead ends: 323 [2022-02-11 00:43:52,828 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:43:52,828 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:52,828 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 582 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-02-11 00:43:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-11 00:43:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 235. [2022-02-11 00:43:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.858974358974359) internal successors, (669), 234 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 669 transitions. [2022-02-11 00:43:52,833 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 669 transitions. Word has length 20 [2022-02-11 00:43:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:52,833 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 669 transitions. [2022-02-11 00:43:52,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 669 transitions. [2022-02-11 00:43:52,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:43:52,834 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:52,834 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:52,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:53,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:53,040 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:53,040 INFO L85 PathProgramCache]: Analyzing trace with hash -669294385, now seen corresponding path program 5 times [2022-02-11 00:43:53,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:53,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534512635] [2022-02-11 00:43:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:53,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:53,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:53,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534512635] [2022-02-11 00:43:53,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534512635] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:53,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947895235] [2022-02-11 00:43:53,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:43:53,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:53,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:53,139 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) [2022-02-11 00:43:53,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 00:43:53,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:43:53,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:53,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:43:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:53,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:53,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:43:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:53,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:53,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:53,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:43:53,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:53,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:43:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:53,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947895235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:53,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:53,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:43:53,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052885362] [2022-02-11 00:43:53,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:53,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:43:53,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:53,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:43:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:43:53,468 INFO L87 Difference]: Start difference. First operand 235 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:53,710 INFO L93 Difference]: Finished difference Result 335 states and 955 transitions. [2022-02-11 00:43:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:43:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:43:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:53,711 INFO L225 Difference]: With dead ends: 335 [2022-02-11 00:43:53,711 INFO L226 Difference]: Without dead ends: 325 [2022-02-11 00:43:53,711 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:43:53,712 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:53,712 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 574 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-02-11 00:43:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-11 00:43:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 231. [2022-02-11 00:43:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2022-02-11 00:43:53,716 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 20 [2022-02-11 00:43:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:53,716 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2022-02-11 00:43:53,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2022-02-11 00:43:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:43:53,717 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:53,717 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:53,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:53,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:53,932 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1927902218, now seen corresponding path program 1 times [2022-02-11 00:43:53,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:53,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849532694] [2022-02-11 00:43:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:53,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:54,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:54,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849532694] [2022-02-11 00:43:54,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849532694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:54,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122353669] [2022-02-11 00:43:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:54,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:54,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:54,019 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) [2022-02-11 00:43:54,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 00:43:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:43:54,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:54,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:43:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:54,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:54,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:54,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:43:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:54,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:43:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:54,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122353669] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:54,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:54,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-02-11 00:43:54,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468273306] [2022-02-11 00:43:54,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:54,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:43:54,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:43:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:43:54,296 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:54,658 INFO L93 Difference]: Finished difference Result 475 states and 1356 transitions. [2022-02-11 00:43:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:43:54,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:43:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:54,660 INFO L225 Difference]: With dead ends: 475 [2022-02-11 00:43:54,660 INFO L226 Difference]: Without dead ends: 466 [2022-02-11 00:43:54,660 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:43:54,661 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:54,661 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 63 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 646 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-02-11 00:43:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-02-11 00:43:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 239. [2022-02-11 00:43:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.8865546218487395) internal successors, (687), 238 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 687 transitions. [2022-02-11 00:43:54,666 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 687 transitions. Word has length 20 [2022-02-11 00:43:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:54,666 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 687 transitions. [2022-02-11 00:43:54,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 687 transitions. [2022-02-11 00:43:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:43:54,667 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:54,667 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:54,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:54,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:54,883 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:54,883 INFO L85 PathProgramCache]: Analyzing trace with hash 475594560, now seen corresponding path program 2 times [2022-02-11 00:43:54,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:54,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084214538] [2022-02-11 00:43:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:54,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:54,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:54,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084214538] [2022-02-11 00:43:54,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084214538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:54,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878230045] [2022-02-11 00:43:54,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:43:54,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:54,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:54,982 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) [2022-02-11 00:43:54,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 00:43:55,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:43:55,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:43:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:55,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:55,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:43:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:55,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:55,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:55,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-02-11 00:43:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:55,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878230045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:55,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:55,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-11 00:43:55,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164424259] [2022-02-11 00:43:55,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:55,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:43:55,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:43:55,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:43:55,731 INFO L87 Difference]: Start difference. First operand 239 states and 687 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:57,418 INFO L93 Difference]: Finished difference Result 655 states and 1874 transitions. [2022-02-11 00:43:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:43:57,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:43:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:57,421 INFO L225 Difference]: With dead ends: 655 [2022-02-11 00:43:57,421 INFO L226 Difference]: Without dead ends: 631 [2022-02-11 00:43:57,422 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=612, Invalid=3420, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:43:57,422 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 250 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 933 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:57,422 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 104 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1005 Invalid, 0 Unknown, 933 Unchecked, 0.4s Time] [2022-02-11 00:43:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-02-11 00:43:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 273. [2022-02-11 00:43:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.926470588235294) internal successors, (796), 272 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 796 transitions. [2022-02-11 00:43:57,429 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 796 transitions. Word has length 20 [2022-02-11 00:43:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:57,429 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 796 transitions. [2022-02-11 00:43:57,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 796 transitions. [2022-02-11 00:43:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:43:57,429 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:57,429 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:57,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:57,643 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,SelfDestructingSolverStorable21 [2022-02-11 00:43:57,643 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1331859903, now seen corresponding path program 1 times [2022-02-11 00:43:57,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:57,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257959644] [2022-02-11 00:43:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:57,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:57,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:57,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257959644] [2022-02-11 00:43:57,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257959644] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:57,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449831957] [2022-02-11 00:43:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:57,737 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) [2022-02-11 00:43:57,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 00:43:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:57,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:43:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:57,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:57,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:43:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:57,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:58,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:58,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:43:58,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:58,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:43:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:58,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449831957] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:58,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:58,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-02-11 00:43:58,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465179931] [2022-02-11 00:43:58,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:58,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:43:58,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:43:58,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:43:58,082 INFO L87 Difference]: Start difference. First operand 273 states and 796 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2022-02-11 00:43:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:58,241 INFO L93 Difference]: Finished difference Result 365 states and 1051 transitions. [2022-02-11 00:43:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:43:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 20 [2022-02-11 00:43:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:58,243 INFO L225 Difference]: With dead ends: 365 [2022-02-11 00:43:58,243 INFO L226 Difference]: Without dead ends: 363 [2022-02-11 00:43:58,243 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:43:58,244 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:58,244 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 57 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2022-02-11 00:43:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-02-11 00:43:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 287. [2022-02-11 00:43:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.9195804195804196) internal successors, (835), 286 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 835 transitions. [2022-02-11 00:43:58,249 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 835 transitions. Word has length 20 [2022-02-11 00:43:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:58,249 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 835 transitions. [2022-02-11 00:43:58,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2022-02-11 00:43:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 835 transitions. [2022-02-11 00:43:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:43:58,250 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:58,250 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:58,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:58,466 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,SelfDestructingSolverStorable22 [2022-02-11 00:43:58,466 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:43:58,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash -941602499, now seen corresponding path program 2 times [2022-02-11 00:43:58,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:58,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568307394] [2022-02-11 00:43:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:58,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:58,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:58,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568307394] [2022-02-11 00:43:58,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568307394] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:58,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958711217] [2022-02-11 00:43:58,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:43:58,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:58,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:58,580 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) [2022-02-11 00:43:58,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 00:43:58,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:43:58,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:43:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:58,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:58,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-02-11 00:43:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:58,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:59,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:59,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-02-11 00:43:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:59,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958711217] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:59,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:59,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-11 00:43:59,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4143987] [2022-02-11 00:43:59,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:59,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:43:59,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:43:59,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:43:59,265 INFO L87 Difference]: Start difference. First operand 287 states and 835 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:00,992 INFO L93 Difference]: Finished difference Result 728 states and 2055 transitions. [2022-02-11 00:44:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:44:00,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:00,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:00,995 INFO L225 Difference]: With dead ends: 728 [2022-02-11 00:44:00,995 INFO L226 Difference]: Without dead ends: 714 [2022-02-11 00:44:00,996 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=603, Invalid=3557, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:44:00,996 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 301 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1016 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:00,996 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 92 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 961 Invalid, 0 Unknown, 1016 Unchecked, 0.4s Time] [2022-02-11 00:44:00,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-11 00:44:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 268. [2022-02-11 00:44:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.932584269662921) internal successors, (783), 267 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 783 transitions. [2022-02-11 00:44:01,003 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 783 transitions. Word has length 20 [2022-02-11 00:44:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:01,003 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 783 transitions. [2022-02-11 00:44:01,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 783 transitions. [2022-02-11 00:44:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:01,004 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:01,004 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:01,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:01,219 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,SelfDestructingSolverStorable23 [2022-02-11 00:44:01,219 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:01,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1411001128, now seen corresponding path program 3 times [2022-02-11 00:44:01,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:01,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483444265] [2022-02-11 00:44:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:01,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:01,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:01,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483444265] [2022-02-11 00:44:01,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483444265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:01,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027666276] [2022-02-11 00:44:01,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:01,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:01,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:01,298 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) [2022-02-11 00:44:01,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 00:44:01,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:44:01,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:01,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:01,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:01,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:01,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:01,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-02-11 00:44:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:01,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027666276] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:01,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:01,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-11 00:44:01,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224341839] [2022-02-11 00:44:01,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:01,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:44:01,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:01,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:44:01,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:44:01,903 INFO L87 Difference]: Start difference. First operand 268 states and 783 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:04,096 INFO L93 Difference]: Finished difference Result 663 states and 1899 transitions. [2022-02-11 00:44:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:44:04,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:04,099 INFO L225 Difference]: With dead ends: 663 [2022-02-11 00:44:04,099 INFO L226 Difference]: Without dead ends: 636 [2022-02-11 00:44:04,100 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=948, Invalid=4904, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:44:04,100 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 341 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 656 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:04,100 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 81 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1159 Invalid, 0 Unknown, 656 Unchecked, 0.5s Time] [2022-02-11 00:44:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-02-11 00:44:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 279. [2022-02-11 00:44:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.946043165467626) internal successors, (819), 278 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 819 transitions. [2022-02-11 00:44:04,113 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 819 transitions. Word has length 20 [2022-02-11 00:44:04,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:04,113 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 819 transitions. [2022-02-11 00:44:04,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:04,113 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 819 transitions. [2022-02-11 00:44:04,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:04,114 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:04,114 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:04,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:04,329 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,SelfDestructingSolverStorable24 [2022-02-11 00:44:04,330 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash -342712452, now seen corresponding path program 4 times [2022-02-11 00:44:04,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:04,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697629255] [2022-02-11 00:44:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:04,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:04,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:04,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697629255] [2022-02-11 00:44:04,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697629255] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:04,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239887993] [2022-02-11 00:44:04,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:04,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:04,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:04,403 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) [2022-02-11 00:44:04,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 00:44:04,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:04,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:04,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:04,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:04,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:04,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:04,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:04,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:04,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:44:04,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:04,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:44:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:04,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239887993] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:04,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:04,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:44:04,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775451891] [2022-02-11 00:44:04,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:04,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:44:04,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:04,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:44:04,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:44:04,701 INFO L87 Difference]: Start difference. First operand 279 states and 819 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:04,948 INFO L93 Difference]: Finished difference Result 383 states and 1131 transitions. [2022-02-11 00:44:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:44:04,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:04,949 INFO L225 Difference]: With dead ends: 383 [2022-02-11 00:44:04,949 INFO L226 Difference]: Without dead ends: 372 [2022-02-11 00:44:04,950 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:44:04,950 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:04,950 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 33 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 553 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-02-11 00:44:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-11 00:44:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 281. [2022-02-11 00:44:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.95) internal successors, (826), 280 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 826 transitions. [2022-02-11 00:44:04,955 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 826 transitions. Word has length 20 [2022-02-11 00:44:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:04,955 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 826 transitions. [2022-02-11 00:44:04,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 826 transitions. [2022-02-11 00:44:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:04,955 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:04,955 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:04,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:05,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:05,159 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash -285788795, now seen corresponding path program 6 times [2022-02-11 00:44:05,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:05,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708028023] [2022-02-11 00:44:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:05,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:05,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708028023] [2022-02-11 00:44:05,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708028023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:05,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829564665] [2022-02-11 00:44:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:05,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:05,291 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) [2022-02-11 00:44:05,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 00:44:05,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:44:05,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:05,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:05,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:05,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:05,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:05,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:05,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:05,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-02-11 00:44:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:05,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829564665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:05,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:05,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-11 00:44:05,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554437702] [2022-02-11 00:44:05,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:05,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:44:05,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:44:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:44:05,945 INFO L87 Difference]: Start difference. First operand 281 states and 826 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:07,455 INFO L93 Difference]: Finished difference Result 646 states and 1825 transitions. [2022-02-11 00:44:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:44:07,456 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:07,458 INFO L225 Difference]: With dead ends: 646 [2022-02-11 00:44:07,458 INFO L226 Difference]: Without dead ends: 607 [2022-02-11 00:44:07,459 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:44:07,459 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 312 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:07,459 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 108 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1108 Invalid, 0 Unknown, 470 Unchecked, 0.4s Time] [2022-02-11 00:44:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-02-11 00:44:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 308. [2022-02-11 00:44:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2022-02-11 00:44:07,495 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2022-02-11 00:44:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:07,495 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2022-02-11 00:44:07,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2022-02-11 00:44:07,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:07,495 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:07,496 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:07,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:07,707 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,SelfDestructingSolverStorable26 [2022-02-11 00:44:07,707 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:07,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2093243258, now seen corresponding path program 1 times [2022-02-11 00:44:07,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:07,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343359526] [2022-02-11 00:44:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:07,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:07,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:07,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343359526] [2022-02-11 00:44:07,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343359526] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:07,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678252396] [2022-02-11 00:44:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:07,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:07,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:07,809 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) [2022-02-11 00:44:07,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 00:44:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:07,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:08,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:08,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:44:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:08,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:08,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:08,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:08,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:08,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678252396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:08,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:08,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-02-11 00:44:08,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415791964] [2022-02-11 00:44:08,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:08,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:08,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:08,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:08,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:08,136 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:08,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:08,304 INFO L93 Difference]: Finished difference Result 396 states and 1143 transitions. [2022-02-11 00:44:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:44:08,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:08,306 INFO L225 Difference]: With dead ends: 396 [2022-02-11 00:44:08,306 INFO L226 Difference]: Without dead ends: 391 [2022-02-11 00:44:08,306 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:44:08,307 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:08,307 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 305 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-02-11 00:44:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-02-11 00:44:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 312. [2022-02-11 00:44:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2022-02-11 00:44:08,312 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 20 [2022-02-11 00:44:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:08,312 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2022-02-11 00:44:08,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2022-02-11 00:44:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:08,312 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:08,313 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:08,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:08,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-11 00:44:08,523 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:08,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:08,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1848967994, now seen corresponding path program 1 times [2022-02-11 00:44:08,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:08,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162443769] [2022-02-11 00:44:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:08,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:08,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162443769] [2022-02-11 00:44:08,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162443769] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:08,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310019072] [2022-02-11 00:44:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:08,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:08,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:08,614 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) [2022-02-11 00:44:08,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 00:44:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:08,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:08,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:44:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:08,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:08,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:08,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:08,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:08,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:08,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310019072] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:08,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:08,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:08,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696983287] [2022-02-11 00:44:08,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:08,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:08,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:08,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:08,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:08,912 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:09,202 INFO L93 Difference]: Finished difference Result 426 states and 1230 transitions. [2022-02-11 00:44:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:44:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:09,203 INFO L225 Difference]: With dead ends: 426 [2022-02-11 00:44:09,204 INFO L226 Difference]: Without dead ends: 420 [2022-02-11 00:44:09,204 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:44:09,204 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:09,204 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 59 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 694 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-02-11 00:44:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-11 00:44:09,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 302. [2022-02-11 00:44:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9601328903654487) internal successors, (891), 301 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 891 transitions. [2022-02-11 00:44:09,209 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 891 transitions. Word has length 20 [2022-02-11 00:44:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:09,209 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 891 transitions. [2022-02-11 00:44:09,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 891 transitions. [2022-02-11 00:44:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:09,210 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:09,210 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:09,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:09,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-11 00:44:09,431 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:09,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1707463971, now seen corresponding path program 7 times [2022-02-11 00:44:09,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:09,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819266361] [2022-02-11 00:44:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:09,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:09,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:09,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819266361] [2022-02-11 00:44:09,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819266361] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:09,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508001370] [2022-02-11 00:44:09,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:09,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:09,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:09,520 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) [2022-02-11 00:44:09,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 00:44:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:09,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:09,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:09,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:09,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:09,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:09,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:09,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:09,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:09,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508001370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:09,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:09,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:09,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856287337] [2022-02-11 00:44:09,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:09,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:09,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:09,830 INFO L87 Difference]: Start difference. First operand 302 states and 891 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:09,961 INFO L93 Difference]: Finished difference Result 375 states and 1093 transitions. [2022-02-11 00:44:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:44:09,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:09,963 INFO L225 Difference]: With dead ends: 375 [2022-02-11 00:44:09,963 INFO L226 Difference]: Without dead ends: 371 [2022-02-11 00:44:09,963 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:44:09,964 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:09,964 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-02-11 00:44:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-11 00:44:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 326. [2022-02-11 00:44:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9723076923076923) internal successors, (966), 325 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 966 transitions. [2022-02-11 00:44:09,968 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 966 transitions. Word has length 20 [2022-02-11 00:44:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:09,968 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 966 transitions. [2022-02-11 00:44:09,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 966 transitions. [2022-02-11 00:44:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:09,969 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:09,969 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:09,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:10,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:10,183 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1699999644, now seen corresponding path program 2 times [2022-02-11 00:44:10,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:10,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538925866] [2022-02-11 00:44:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:10,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:10,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:10,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538925866] [2022-02-11 00:44:10,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538925866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:10,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364497134] [2022-02-11 00:44:10,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:10,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:10,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:10,266 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) [2022-02-11 00:44:10,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 00:44:10,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:10,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:10,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:10,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:10,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:10,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:10,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:10,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-02-11 00:44:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:10,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364497134] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:10,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:10,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-11 00:44:10,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60852149] [2022-02-11 00:44:10,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:10,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:44:10,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:44:10,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:44:10,842 INFO L87 Difference]: Start difference. First operand 326 states and 966 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:13,981 INFO L93 Difference]: Finished difference Result 849 states and 2328 transitions. [2022-02-11 00:44:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 00:44:13,982 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:13,984 INFO L225 Difference]: With dead ends: 849 [2022-02-11 00:44:13,984 INFO L226 Difference]: Without dead ends: 807 [2022-02-11 00:44:13,985 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 00:44:13,986 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 427 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:13,986 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 128 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1408 Invalid, 0 Unknown, 291 Unchecked, 0.6s Time] [2022-02-11 00:44:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-02-11 00:44:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 322. [2022-02-11 00:44:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.987538940809969) internal successors, (959), 321 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 959 transitions. [2022-02-11 00:44:13,992 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 959 transitions. Word has length 20 [2022-02-11 00:44:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:13,992 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 959 transitions. [2022-02-11 00:44:13,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 959 transitions. [2022-02-11 00:44:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:13,993 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:13,993 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:14,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:14,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:14,209 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash -905666415, now seen corresponding path program 8 times [2022-02-11 00:44:14,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:14,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142151328] [2022-02-11 00:44:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:14,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:14,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:14,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142151328] [2022-02-11 00:44:14,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142151328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:14,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297416365] [2022-02-11 00:44:14,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:14,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:14,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:14,293 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) [2022-02-11 00:44:14,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 00:44:14,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:14,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:14,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:14,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:14,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:14,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:14,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:14,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:14,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-02-11 00:44:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:14,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297416365] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:14,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:14,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-11 00:44:14,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108025210] [2022-02-11 00:44:14,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:14,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:44:14,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:14,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:44:14,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:44:14,828 INFO L87 Difference]: Start difference. First operand 322 states and 959 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:17,508 INFO L93 Difference]: Finished difference Result 762 states and 2119 transitions. [2022-02-11 00:44:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:44:17,509 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:17,511 INFO L225 Difference]: With dead ends: 762 [2022-02-11 00:44:17,511 INFO L226 Difference]: Without dead ends: 730 [2022-02-11 00:44:17,512 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1205, Invalid=4197, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:44:17,512 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 359 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:17,513 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 96 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1346 Invalid, 0 Unknown, 327 Unchecked, 0.6s Time] [2022-02-11 00:44:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-02-11 00:44:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 321. [2022-02-11 00:44:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 3.0) internal successors, (960), 320 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) [2022-02-11 00:44:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 960 transitions. [2022-02-11 00:44:17,519 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 960 transitions. Word has length 20 [2022-02-11 00:44:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:17,519 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 960 transitions. [2022-02-11 00:44:17,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 960 transitions. [2022-02-11 00:44:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:17,520 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:17,520 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:17,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:17,735 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,SelfDestructingSolverStorable31 [2022-02-11 00:44:17,735 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash -149178578, now seen corresponding path program 5 times [2022-02-11 00:44:17,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:17,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259373866] [2022-02-11 00:44:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:17,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:17,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:17,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259373866] [2022-02-11 00:44:17,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259373866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:17,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693276529] [2022-02-11 00:44:17,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:17,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:17,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:17,824 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) [2022-02-11 00:44:17,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 00:44:17,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:18,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:18,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:44:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:18,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:18,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:18,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:18,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:18,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:18,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693276529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:18,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:18,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-02-11 00:44:18,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897513928] [2022-02-11 00:44:18,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:18,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:18,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:18,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:18,166 INFO L87 Difference]: Start difference. First operand 321 states and 960 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:18,349 INFO L93 Difference]: Finished difference Result 406 states and 1198 transitions. [2022-02-11 00:44:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:44:18,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:18,351 INFO L225 Difference]: With dead ends: 406 [2022-02-11 00:44:18,351 INFO L226 Difference]: Without dead ends: 400 [2022-02-11 00:44:18,351 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:44:18,352 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:18,352 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 323 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-02-11 00:44:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-02-11 00:44:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 330. [2022-02-11 00:44:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0091185410334345) internal successors, (990), 329 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 990 transitions. [2022-02-11 00:44:18,357 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 990 transitions. Word has length 20 [2022-02-11 00:44:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:18,357 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 990 transitions. [2022-02-11 00:44:18,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 990 transitions. [2022-02-11 00:44:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:18,357 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:18,357 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:18,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-11 00:44:18,573 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,SelfDestructingSolverStorable32 [2022-02-11 00:44:18,573 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:18,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1178685170, now seen corresponding path program 6 times [2022-02-11 00:44:18,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:18,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049516183] [2022-02-11 00:44:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:18,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:18,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:18,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049516183] [2022-02-11 00:44:18,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049516183] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:18,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032336596] [2022-02-11 00:44:18,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:18,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:18,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:18,645 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) [2022-02-11 00:44:18,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 00:44:18,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:44:18,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:18,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:18,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:18,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:18,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:18,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:19,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:19,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-02-11 00:44:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:19,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032336596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:19,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:19,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-11 00:44:19,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817216657] [2022-02-11 00:44:19,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:19,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:44:19,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:19,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:44:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:44:19,204 INFO L87 Difference]: Start difference. First operand 330 states and 990 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:22,265 INFO L93 Difference]: Finished difference Result 799 states and 2191 transitions. [2022-02-11 00:44:22,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 00:44:22,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:22,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:22,268 INFO L225 Difference]: With dead ends: 799 [2022-02-11 00:44:22,268 INFO L226 Difference]: Without dead ends: 770 [2022-02-11 00:44:22,270 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1387, Invalid=5255, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 00:44:22,270 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 482 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:22,270 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 131 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1304 Invalid, 0 Unknown, 253 Unchecked, 0.6s Time] [2022-02-11 00:44:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-02-11 00:44:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 339. [2022-02-11 00:44:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0177514792899407) internal successors, (1020), 338 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1020 transitions. [2022-02-11 00:44:22,280 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1020 transitions. Word has length 20 [2022-02-11 00:44:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:22,280 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1020 transitions. [2022-02-11 00:44:22,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1020 transitions. [2022-02-11 00:44:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:22,281 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:22,281 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:22,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:22,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:22,497 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash -967485590, now seen corresponding path program 7 times [2022-02-11 00:44:22,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:22,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208636166] [2022-02-11 00:44:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:22,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:22,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:22,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208636166] [2022-02-11 00:44:22,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208636166] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:22,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76758409] [2022-02-11 00:44:22,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:22,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:22,588 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) [2022-02-11 00:44:22,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 00:44:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:22,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:22,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:22,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:22,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:22,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:22,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:22,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:22,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76758409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:22,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:22,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:22,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869417153] [2022-02-11 00:44:22,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:22,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:22,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:22,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:22,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:22,888 INFO L87 Difference]: Start difference. First operand 339 states and 1020 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:23,049 INFO L93 Difference]: Finished difference Result 409 states and 1221 transitions. [2022-02-11 00:44:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:44:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:23,051 INFO L225 Difference]: With dead ends: 409 [2022-02-11 00:44:23,051 INFO L226 Difference]: Without dead ends: 398 [2022-02-11 00:44:23,051 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:44:23,051 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:23,051 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 364 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-02-11 00:44:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-11 00:44:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 335. [2022-02-11 00:44:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0179640718562872) internal successors, (1008), 334 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1008 transitions. [2022-02-11 00:44:23,056 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1008 transitions. Word has length 20 [2022-02-11 00:44:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:23,056 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1008 transitions. [2022-02-11 00:44:23,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1008 transitions. [2022-02-11 00:44:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:23,057 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:23,057 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:23,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-11 00:44:23,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:23,273 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:23,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:23,273 INFO L85 PathProgramCache]: Analyzing trace with hash -20095859, now seen corresponding path program 1 times [2022-02-11 00:44:23,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:23,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768166037] [2022-02-11 00:44:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:23,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:23,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:23,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768166037] [2022-02-11 00:44:23,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768166037] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:23,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663980097] [2022-02-11 00:44:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:23,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:23,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:23,361 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) [2022-02-11 00:44:23,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 00:44:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:23,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:23,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:44:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:23,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:23,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:23,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:23,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:23,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:23,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663980097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:23,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:23,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-02-11 00:44:23,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493994718] [2022-02-11 00:44:23,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:23,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:23,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:23,675 INFO L87 Difference]: Start difference. First operand 335 states and 1008 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:23,911 INFO L93 Difference]: Finished difference Result 435 states and 1270 transitions. [2022-02-11 00:44:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:44:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:23,913 INFO L225 Difference]: With dead ends: 435 [2022-02-11 00:44:23,913 INFO L226 Difference]: Without dead ends: 429 [2022-02-11 00:44:23,913 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:44:23,913 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:23,914 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 50 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 521 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-02-11 00:44:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-02-11 00:44:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 334. [2022-02-11 00:44:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.021021021021021) internal successors, (1006), 333 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2022-02-11 00:44:23,919 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2022-02-11 00:44:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:23,919 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2022-02-11 00:44:23,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2022-02-11 00:44:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:23,919 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:23,919 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:23,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-11 00:44:24,131 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,SelfDestructingSolverStorable35 [2022-02-11 00:44:24,131 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1330179178, now seen corresponding path program 8 times [2022-02-11 00:44:24,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:24,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745181389] [2022-02-11 00:44:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:24,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:24,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:24,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745181389] [2022-02-11 00:44:24,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745181389] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:24,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320112791] [2022-02-11 00:44:24,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:24,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:24,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:24,234 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) [2022-02-11 00:44:24,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 00:44:24,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:24,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:24,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:24,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:24,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:24,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-02-11 00:44:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:24,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:24,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:24,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-02-11 00:44:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:24,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320112791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:24,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:24,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-11 00:44:24,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217888981] [2022-02-11 00:44:24,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:24,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:44:24,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:24,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:44:24,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:44:24,805 INFO L87 Difference]: Start difference. First operand 334 states and 1006 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:26,269 INFO L93 Difference]: Finished difference Result 660 states and 1862 transitions. [2022-02-11 00:44:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:44:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:26,272 INFO L225 Difference]: With dead ends: 660 [2022-02-11 00:44:26,272 INFO L226 Difference]: Without dead ends: 633 [2022-02-11 00:44:26,272 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:44:26,273 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 293 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:26,273 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 109 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1132 Invalid, 0 Unknown, 736 Unchecked, 0.5s Time] [2022-02-11 00:44:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-11 00:44:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 327. [2022-02-11 00:44:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0092024539877302) internal successors, (981), 326 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 981 transitions. [2022-02-11 00:44:26,278 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 981 transitions. Word has length 20 [2022-02-11 00:44:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:26,278 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 981 transitions. [2022-02-11 00:44:26,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 981 transitions. [2022-02-11 00:44:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:26,279 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:26,279 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:26,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:26,487 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,SelfDestructingSolverStorable36 [2022-02-11 00:44:26,487 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash -353300289, now seen corresponding path program 9 times [2022-02-11 00:44:26,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:26,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515355580] [2022-02-11 00:44:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:26,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:26,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515355580] [2022-02-11 00:44:26,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515355580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:26,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462029014] [2022-02-11 00:44:26,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:26,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:26,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:26,564 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) [2022-02-11 00:44:26,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 00:44:26,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:44:26,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:26,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:26,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:26,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:26,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:26,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:26,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-02-11 00:44:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:26,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462029014] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:26,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:26,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-11 00:44:26,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386392951] [2022-02-11 00:44:26,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:26,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:44:26,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:26,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:44:26,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:44:26,937 INFO L87 Difference]: Start difference. First operand 327 states and 981 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2022-02-11 00:44:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:27,317 INFO L93 Difference]: Finished difference Result 450 states and 1332 transitions. [2022-02-11 00:44:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:44:27,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 20 [2022-02-11 00:44:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:27,319 INFO L225 Difference]: With dead ends: 450 [2022-02-11 00:44:27,319 INFO L226 Difference]: Without dead ends: 440 [2022-02-11 00:44:27,319 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:44:27,319 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 92 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:27,319 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 47 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 649 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-02-11 00:44:27,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-11 00:44:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2022-02-11 00:44:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0088757396449703) internal successors, (1017), 338 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1017 transitions. [2022-02-11 00:44:27,324 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1017 transitions. Word has length 20 [2022-02-11 00:44:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:27,324 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1017 transitions. [2022-02-11 00:44:27,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2022-02-11 00:44:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1017 transitions. [2022-02-11 00:44:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:27,325 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:27,325 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:27,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-11 00:44:27,535 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,SelfDestructingSolverStorable37 [2022-02-11 00:44:27,535 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:27,535 INFO L85 PathProgramCache]: Analyzing trace with hash 214268651, now seen corresponding path program 10 times [2022-02-11 00:44:27,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:27,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737710792] [2022-02-11 00:44:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:27,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:27,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:27,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737710792] [2022-02-11 00:44:27,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737710792] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:27,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691393147] [2022-02-11 00:44:27,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:27,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:27,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:27,615 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) [2022-02-11 00:44:27,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 00:44:27,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:27,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:27,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:27,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:27,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:27,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:27,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:27,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:27,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:27,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:27,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691393147] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:27,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:27,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:27,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982877975] [2022-02-11 00:44:27,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:27,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:27,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:27,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:27,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:27,886 INFO L87 Difference]: Start difference. First operand 339 states and 1017 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:28,059 INFO L93 Difference]: Finished difference Result 422 states and 1257 transitions. [2022-02-11 00:44:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:44:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:28,060 INFO L225 Difference]: With dead ends: 422 [2022-02-11 00:44:28,061 INFO L226 Difference]: Without dead ends: 411 [2022-02-11 00:44:28,061 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:44:28,061 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:28,061 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 25 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:44:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-02-11 00:44:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 336. [2022-02-11 00:44:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.008955223880597) internal successors, (1008), 335 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1008 transitions. [2022-02-11 00:44:28,066 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1008 transitions. Word has length 20 [2022-02-11 00:44:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:28,066 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1008 transitions. [2022-02-11 00:44:28,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1008 transitions. [2022-02-11 00:44:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:28,066 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:28,067 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:28,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-11 00:44:28,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 00:44:28,276 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:28,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1590769142, now seen corresponding path program 9 times [2022-02-11 00:44:28,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:28,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318861679] [2022-02-11 00:44:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:28,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:28,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:28,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318861679] [2022-02-11 00:44:28,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318861679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:28,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61816694] [2022-02-11 00:44:28,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:28,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:28,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:28,343 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) [2022-02-11 00:44:28,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 00:44:28,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:44:28,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:28,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:28,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:28,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:28,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:28,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:28,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-02-11 00:44:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:28,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61816694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:28,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:28,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-11 00:44:28,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386932345] [2022-02-11 00:44:28,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:28,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:44:28,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:28,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:44:28,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:44:28,735 INFO L87 Difference]: Start difference. First operand 336 states and 1008 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:29,145 INFO L93 Difference]: Finished difference Result 436 states and 1291 transitions. [2022-02-11 00:44:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:44:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:44:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:29,147 INFO L225 Difference]: With dead ends: 436 [2022-02-11 00:44:29,147 INFO L226 Difference]: Without dead ends: 427 [2022-02-11 00:44:29,147 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:44:29,147 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:29,148 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 54 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 720 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2022-02-11 00:44:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-02-11 00:44:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 339. [2022-02-11 00:44:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0118343195266273) internal successors, (1018), 338 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1018 transitions. [2022-02-11 00:44:29,152 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1018 transitions. Word has length 20 [2022-02-11 00:44:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:29,152 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1018 transitions. [2022-02-11 00:44:29,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1018 transitions. [2022-02-11 00:44:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:29,153 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:29,153 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:29,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:29,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 00:44:29,369 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:29,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1635909478, now seen corresponding path program 10 times [2022-02-11 00:44:29,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:29,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057179046] [2022-02-11 00:44:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:29,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:29,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057179046] [2022-02-11 00:44:29,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057179046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:29,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939949896] [2022-02-11 00:44:29,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:29,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:29,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:29,443 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) [2022-02-11 00:44:29,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 00:44:29,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:29,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:29,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:29,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:29,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:29,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:29,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:29,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:29,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:29,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:29,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939949896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:29,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:29,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:29,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177142216] [2022-02-11 00:44:29,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:29,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:29,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:29,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:29,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:29,727 INFO L87 Difference]: Start difference. First operand 339 states and 1018 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:29,920 INFO L93 Difference]: Finished difference Result 413 states and 1233 transitions. [2022-02-11 00:44:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:44:29,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:29,922 INFO L225 Difference]: With dead ends: 413 [2022-02-11 00:44:29,922 INFO L226 Difference]: Without dead ends: 402 [2022-02-11 00:44:29,922 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:44:29,923 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:29,923 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:44:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-02-11 00:44:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 336. [2022-02-11 00:44:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.008955223880597) internal successors, (1008), 335 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1008 transitions. [2022-02-11 00:44:29,927 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1008 transitions. Word has length 20 [2022-02-11 00:44:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:29,927 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1008 transitions. [2022-02-11 00:44:29,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1008 transitions. [2022-02-11 00:44:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:29,928 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:29,928 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:29,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:30,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:30,143 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash -805583803, now seen corresponding path program 11 times [2022-02-11 00:44:30,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:30,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854849338] [2022-02-11 00:44:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:30,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:30,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:30,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854849338] [2022-02-11 00:44:30,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854849338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:30,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676675042] [2022-02-11 00:44:30,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:30,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:30,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:30,210 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) [2022-02-11 00:44:30,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 00:44:30,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:44:30,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:30,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:30,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:30,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:30,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:30,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:30,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:30,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:30,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:30,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676675042] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:30,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:30,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:30,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588578351] [2022-02-11 00:44:30,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:30,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:30,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:30,503 INFO L87 Difference]: Start difference. First operand 336 states and 1008 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:30,734 INFO L93 Difference]: Finished difference Result 439 states and 1300 transitions. [2022-02-11 00:44:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:44:30,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:30,736 INFO L225 Difference]: With dead ends: 439 [2022-02-11 00:44:30,736 INFO L226 Difference]: Without dead ends: 428 [2022-02-11 00:44:30,736 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:44:30,736 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:30,736 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 32 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:44:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-11 00:44:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 339. [2022-02-11 00:44:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2022-02-11 00:44:30,741 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2022-02-11 00:44:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:30,741 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2022-02-11 00:44:30,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2022-02-11 00:44:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:30,742 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:30,742 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:30,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-11 00:44:30,942 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,SelfDestructingSolverStorable41 [2022-02-11 00:44:30,943 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -881419218, now seen corresponding path program 11 times [2022-02-11 00:44:30,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:30,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471937438] [2022-02-11 00:44:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:31,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:31,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471937438] [2022-02-11 00:44:31,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471937438] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:31,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488375153] [2022-02-11 00:44:31,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:31,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:31,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:31,018 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) [2022-02-11 00:44:31,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 00:44:31,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:44:31,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:31,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:31,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:31,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 00:44:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:31,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:31,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:31,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:31,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:31,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:31,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488375153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:31,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:31,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:31,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771552520] [2022-02-11 00:44:31,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:31,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:31,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:31,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:31,285 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:31,544 INFO L93 Difference]: Finished difference Result 429 states and 1275 transitions. [2022-02-11 00:44:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:44:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:31,546 INFO L225 Difference]: With dead ends: 429 [2022-02-11 00:44:31,546 INFO L226 Difference]: Without dead ends: 418 [2022-02-11 00:44:31,546 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:44:31,546 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:31,546 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:44:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-02-11 00:44:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 339. [2022-02-11 00:44:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2022-02-11 00:44:31,552 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2022-02-11 00:44:31,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:31,552 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2022-02-11 00:44:31,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2022-02-11 00:44:31,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:31,553 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:31,553 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:31,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-11 00:44:31,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:31,763 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:31,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:31,764 INFO L85 PathProgramCache]: Analyzing trace with hash -136538836, now seen corresponding path program 12 times [2022-02-11 00:44:31,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:31,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136665092] [2022-02-11 00:44:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:31,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:31,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:31,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136665092] [2022-02-11 00:44:31,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136665092] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:31,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475692405] [2022-02-11 00:44:31,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:31,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:31,843 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) [2022-02-11 00:44:31,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 00:44:31,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:44:31,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:31,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:31,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:32,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:32,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-02-11 00:44:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:32,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:32,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:32,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-02-11 00:44:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:32,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475692405] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:32,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:32,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-11 00:44:32,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246449496] [2022-02-11 00:44:32,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:32,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:44:32,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:32,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:44:32,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:44:32,453 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:34,577 INFO L93 Difference]: Finished difference Result 981 states and 2663 transitions. [2022-02-11 00:44:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:44:34,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:34,581 INFO L225 Difference]: With dead ends: 981 [2022-02-11 00:44:34,581 INFO L226 Difference]: Without dead ends: 975 [2022-02-11 00:44:34,582 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=814, Invalid=5038, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:44:34,582 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 349 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1809 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:34,582 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 147 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1148 Invalid, 0 Unknown, 1809 Unchecked, 0.4s Time] [2022-02-11 00:44:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-02-11 00:44:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 358. [2022-02-11 00:44:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.988795518207283) internal successors, (1067), 357 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1067 transitions. [2022-02-11 00:44:34,590 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1067 transitions. Word has length 20 [2022-02-11 00:44:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:34,590 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1067 transitions. [2022-02-11 00:44:34,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1067 transitions. [2022-02-11 00:44:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:34,591 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:34,591 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:34,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:34,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:34,804 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash -62802732, now seen corresponding path program 13 times [2022-02-11 00:44:34,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:34,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824357226] [2022-02-11 00:44:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:34,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:34,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:34,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824357226] [2022-02-11 00:44:34,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824357226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:34,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645346134] [2022-02-11 00:44:34,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:34,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:34,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:34,878 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) [2022-02-11 00:44:34,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 00:44:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:34,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:35,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:44:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:35,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:35,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:35,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:44:35,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:35,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:44:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:35,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645346134] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:35,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:35,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-02-11 00:44:35,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388454336] [2022-02-11 00:44:35,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:35,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:44:35,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:44:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:44:35,121 INFO L87 Difference]: Start difference. First operand 358 states and 1067 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:35,445 INFO L93 Difference]: Finished difference Result 602 states and 1749 transitions. [2022-02-11 00:44:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:44:35,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:35,446 INFO L225 Difference]: With dead ends: 602 [2022-02-11 00:44:35,446 INFO L226 Difference]: Without dead ends: 593 [2022-02-11 00:44:35,446 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:44:35,447 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 106 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:35,447 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 66 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 666 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-02-11 00:44:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-02-11 00:44:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 351. [2022-02-11 00:44:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.98) internal successors, (1043), 350 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1043 transitions. [2022-02-11 00:44:35,452 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1043 transitions. Word has length 20 [2022-02-11 00:44:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:35,452 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1043 transitions. [2022-02-11 00:44:35,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1043 transitions. [2022-02-11 00:44:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:35,453 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:35,453 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:35,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-11 00:44:35,653 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,SelfDestructingSolverStorable44 [2022-02-11 00:44:35,654 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2099652405, now seen corresponding path program 12 times [2022-02-11 00:44:35,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:35,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954646257] [2022-02-11 00:44:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:35,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:35,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:35,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954646257] [2022-02-11 00:44:35,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954646257] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:35,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205998480] [2022-02-11 00:44:35,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:35,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:35,744 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) [2022-02-11 00:44:35,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 00:44:35,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:44:35,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:35,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:35,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:35,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:35,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:36,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:36,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:36,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-02-11 00:44:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:36,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205998480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:36,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:36,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-11 00:44:36,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220272755] [2022-02-11 00:44:36,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:36,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:44:36,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:44:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:44:36,348 INFO L87 Difference]: Start difference. First operand 351 states and 1043 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:37,333 INFO L93 Difference]: Finished difference Result 587 states and 1698 transitions. [2022-02-11 00:44:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:44:37,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:37,334 INFO L225 Difference]: With dead ends: 587 [2022-02-11 00:44:37,334 INFO L226 Difference]: Without dead ends: 558 [2022-02-11 00:44:37,335 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:44:37,335 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 296 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:37,335 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 104 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 984 Invalid, 0 Unknown, 728 Unchecked, 0.4s Time] [2022-02-11 00:44:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-02-11 00:44:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2022-02-11 00:44:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0) internal successors, (1077), 359 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1077 transitions. [2022-02-11 00:44:37,340 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1077 transitions. Word has length 20 [2022-02-11 00:44:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:37,341 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1077 transitions. [2022-02-11 00:44:37,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1077 transitions. [2022-02-11 00:44:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:37,341 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:37,341 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:37,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-11 00:44:37,542 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,SelfDestructingSolverStorable45 [2022-02-11 00:44:37,542 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:37,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1481560959, now seen corresponding path program 13 times [2022-02-11 00:44:37,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:37,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436944218] [2022-02-11 00:44:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:37,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:37,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:37,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436944218] [2022-02-11 00:44:37,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436944218] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:37,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711236312] [2022-02-11 00:44:37,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:37,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:37,613 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) [2022-02-11 00:44:37,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 00:44:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:37,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:37,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:37,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:37,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:37,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:37,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:37,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:37,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:37,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711236312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:37,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:37,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:37,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740158830] [2022-02-11 00:44:37,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:37,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:37,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:37,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:37,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:37,885 INFO L87 Difference]: Start difference. First operand 360 states and 1077 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:38,181 INFO L93 Difference]: Finished difference Result 457 states and 1351 transitions. [2022-02-11 00:44:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:44:38,182 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:38,183 INFO L225 Difference]: With dead ends: 457 [2022-02-11 00:44:38,183 INFO L226 Difference]: Without dead ends: 447 [2022-02-11 00:44:38,183 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:44:38,183 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:38,183 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 60 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:44:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-11 00:44:38,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 363. [2022-02-11 00:44:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0) internal successors, (1086), 362 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1086 transitions. [2022-02-11 00:44:38,188 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1086 transitions. Word has length 20 [2022-02-11 00:44:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:38,188 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1086 transitions. [2022-02-11 00:44:38,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1086 transitions. [2022-02-11 00:44:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:38,189 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:38,189 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:38,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:38,399 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,SelfDestructingSolverStorable46 [2022-02-11 00:44:38,399 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:38,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:38,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1979667897, now seen corresponding path program 14 times [2022-02-11 00:44:38,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:38,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738171455] [2022-02-11 00:44:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:38,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:38,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:38,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738171455] [2022-02-11 00:44:38,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738171455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:38,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831519875] [2022-02-11 00:44:38,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:38,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:38,477 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) [2022-02-11 00:44:38,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 00:44:38,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:38,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:38,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:38,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:38,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:38,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:38,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-02-11 00:44:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:39,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831519875] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:39,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:39,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-11 00:44:39,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637909930] [2022-02-11 00:44:39,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:39,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:44:39,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:44:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:44:39,019 INFO L87 Difference]: Start difference. First operand 363 states and 1086 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:40,867 INFO L93 Difference]: Finished difference Result 663 states and 1878 transitions. [2022-02-11 00:44:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:44:40,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:40,869 INFO L225 Difference]: With dead ends: 663 [2022-02-11 00:44:40,869 INFO L226 Difference]: Without dead ends: 631 [2022-02-11 00:44:40,869 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:44:40,869 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:40,870 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 112 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1484 Invalid, 0 Unknown, 204 Unchecked, 0.6s Time] [2022-02-11 00:44:40,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-02-11 00:44:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 363. [2022-02-11 00:44:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0) internal successors, (1086), 362 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1086 transitions. [2022-02-11 00:44:40,875 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1086 transitions. Word has length 20 [2022-02-11 00:44:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:40,876 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1086 transitions. [2022-02-11 00:44:40,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1086 transitions. [2022-02-11 00:44:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:40,876 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:40,876 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:40,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-11 00:44:41,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:41,077 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2061801888, now seen corresponding path program 14 times [2022-02-11 00:44:41,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:41,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248085113] [2022-02-11 00:44:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:41,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:41,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:41,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248085113] [2022-02-11 00:44:41,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248085113] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:41,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564431684] [2022-02-11 00:44:41,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:41,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:41,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:41,168 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) [2022-02-11 00:44:41,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 00:44:41,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:41,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:41,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:41,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:41,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:41,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:41,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-02-11 00:44:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:41,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564431684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:41,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:41,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-11 00:44:41,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261756715] [2022-02-11 00:44:41,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:41,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:44:41,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:41,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:44:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:44:41,782 INFO L87 Difference]: Start difference. First operand 363 states and 1086 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:42,879 INFO L93 Difference]: Finished difference Result 593 states and 1695 transitions. [2022-02-11 00:44:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:44:42,879 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:42,880 INFO L225 Difference]: With dead ends: 593 [2022-02-11 00:44:42,880 INFO L226 Difference]: Without dead ends: 562 [2022-02-11 00:44:42,881 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=414, Invalid=1656, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:44:42,881 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 242 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:42,881 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 112 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1018 Invalid, 0 Unknown, 338 Unchecked, 0.4s Time] [2022-02-11 00:44:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-02-11 00:44:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 373. [2022-02-11 00:44:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0188172043010755) internal successors, (1123), 372 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1123 transitions. [2022-02-11 00:44:42,886 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1123 transitions. Word has length 20 [2022-02-11 00:44:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:42,887 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1123 transitions. [2022-02-11 00:44:42,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1123 transitions. [2022-02-11 00:44:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:42,887 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:42,887 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:42,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-11 00:44:43,088 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,SelfDestructingSolverStorable48 [2022-02-11 00:44:43,088 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash 175206200, now seen corresponding path program 15 times [2022-02-11 00:44:43,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:43,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110743180] [2022-02-11 00:44:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:43,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:43,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:43,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110743180] [2022-02-11 00:44:43,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110743180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:43,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829499874] [2022-02-11 00:44:43,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:43,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:43,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:43,176 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) [2022-02-11 00:44:43,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 00:44:43,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:44:43,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:43,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:43,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:43,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:43,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:43,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-02-11 00:44:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:43,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829499874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:43,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:43,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-11 00:44:43,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283500108] [2022-02-11 00:44:43,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:43,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:44:43,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:43,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:44:43,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:44:43,721 INFO L87 Difference]: Start difference. First operand 373 states and 1123 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:45,124 INFO L93 Difference]: Finished difference Result 610 states and 1761 transitions. [2022-02-11 00:44:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:44:45,124 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:45,125 INFO L225 Difference]: With dead ends: 610 [2022-02-11 00:44:45,125 INFO L226 Difference]: Without dead ends: 583 [2022-02-11 00:44:45,126 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=539, Invalid=2011, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:44:45,126 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 285 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:45,126 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 71 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 871 Invalid, 0 Unknown, 206 Unchecked, 0.4s Time] [2022-02-11 00:44:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-11 00:44:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 376. [2022-02-11 00:44:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.021333333333333) internal successors, (1133), 375 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1133 transitions. [2022-02-11 00:44:45,132 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1133 transitions. Word has length 20 [2022-02-11 00:44:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:45,132 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1133 transitions. [2022-02-11 00:44:45,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1133 transitions. [2022-02-11 00:44:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:45,132 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:45,132 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:45,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:45,334 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,SelfDestructingSolverStorable49 [2022-02-11 00:44:45,334 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:45,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1243494876, now seen corresponding path program 16 times [2022-02-11 00:44:45,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:45,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277801764] [2022-02-11 00:44:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:45,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:45,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:45,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277801764] [2022-02-11 00:44:45,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277801764] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:45,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113195922] [2022-02-11 00:44:45,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:45,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:45,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:45,411 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) [2022-02-11 00:44:45,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 00:44:45,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:45,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:45,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:45,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:45,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:45,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:45,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:45,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:45,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:45,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:45,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:45,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113195922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:45,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:45,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:45,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204889149] [2022-02-11 00:44:45,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:45,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:45,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:45,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:45,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:45,709 INFO L87 Difference]: Start difference. First operand 376 states and 1133 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:45,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:45,961 INFO L93 Difference]: Finished difference Result 457 states and 1362 transitions. [2022-02-11 00:44:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:44:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:45,962 INFO L225 Difference]: With dead ends: 457 [2022-02-11 00:44:45,962 INFO L226 Difference]: Without dead ends: 446 [2022-02-11 00:44:45,962 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:44:45,963 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:45,963 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 44 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:44:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-02-11 00:44:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 371. [2022-02-11 00:44:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.018918918918919) internal successors, (1117), 370 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1117 transitions. [2022-02-11 00:44:45,979 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1117 transitions. Word has length 20 [2022-02-11 00:44:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:45,979 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1117 transitions. [2022-02-11 00:44:45,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1117 transitions. [2022-02-11 00:44:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:45,980 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:45,980 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:45,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:46,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:46,189 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1857680177, now seen corresponding path program 15 times [2022-02-11 00:44:46,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:46,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714307660] [2022-02-11 00:44:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:46,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:46,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:46,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714307660] [2022-02-11 00:44:46,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714307660] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:46,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923489373] [2022-02-11 00:44:46,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:46,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:46,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:46,262 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) [2022-02-11 00:44:46,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 00:44:46,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:44:46,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:46,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:46,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:46,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:46,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:46,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:46,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:46,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-02-11 00:44:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:46,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923489373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:46,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:46,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-02-11 00:44:46,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267461266] [2022-02-11 00:44:46,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:46,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:44:46,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:44:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:44:46,696 INFO L87 Difference]: Start difference. First operand 371 states and 1117 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2022-02-11 00:44:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:47,050 INFO L93 Difference]: Finished difference Result 520 states and 1540 transitions. [2022-02-11 00:44:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:44:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 20 [2022-02-11 00:44:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:47,051 INFO L225 Difference]: With dead ends: 520 [2022-02-11 00:44:47,051 INFO L226 Difference]: Without dead ends: 511 [2022-02-11 00:44:47,051 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:44:47,052 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:47,052 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 43 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 420 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-02-11 00:44:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-11 00:44:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 378. [2022-02-11 00:44:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.018567639257294) internal successors, (1138), 377 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1138 transitions. [2022-02-11 00:44:47,057 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1138 transitions. Word has length 20 [2022-02-11 00:44:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:47,057 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1138 transitions. [2022-02-11 00:44:47,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2022-02-11 00:44:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1138 transitions. [2022-02-11 00:44:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:47,058 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:47,058 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:47,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-11 00:44:47,258 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,SelfDestructingSolverStorable51 [2022-02-11 00:44:47,258 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1869718179, now seen corresponding path program 16 times [2022-02-11 00:44:47,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:47,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946071293] [2022-02-11 00:44:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:47,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:47,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:47,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946071293] [2022-02-11 00:44:47,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946071293] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:47,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778087678] [2022-02-11 00:44:47,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:47,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:47,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:47,329 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) [2022-02-11 00:44:47,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 00:44:47,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:47,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:47,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:47,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:47,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:47,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:47,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:47,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:47,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778087678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:47,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:47,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:47,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273617332] [2022-02-11 00:44:47,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:47,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:47,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:47,591 INFO L87 Difference]: Start difference. First operand 378 states and 1138 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:47,755 INFO L93 Difference]: Finished difference Result 458 states and 1362 transitions. [2022-02-11 00:44:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:44:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:47,757 INFO L225 Difference]: With dead ends: 458 [2022-02-11 00:44:47,757 INFO L226 Difference]: Without dead ends: 448 [2022-02-11 00:44:47,757 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:44:47,757 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:47,757 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 381 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-02-11 00:44:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-02-11 00:44:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 378. [2022-02-11 00:44:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.018567639257294) internal successors, (1138), 377 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1138 transitions. [2022-02-11 00:44:47,762 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1138 transitions. Word has length 20 [2022-02-11 00:44:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:47,762 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1138 transitions. [2022-02-11 00:44:47,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1138 transitions. [2022-02-11 00:44:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:47,763 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:47,763 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:47,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:47,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:47,964 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash -493217688, now seen corresponding path program 17 times [2022-02-11 00:44:47,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:47,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449439662] [2022-02-11 00:44:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:47,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:48,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:48,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449439662] [2022-02-11 00:44:48,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449439662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:48,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026417486] [2022-02-11 00:44:48,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:48,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:48,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:48,060 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) [2022-02-11 00:44:48,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 00:44:48,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:44:48,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:48,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:48,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:48,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:48,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:48,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:48,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:48,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:48,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:48,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026417486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:48,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:48,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:48,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686454399] [2022-02-11 00:44:48,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:48,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:48,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:48,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:48,365 INFO L87 Difference]: Start difference. First operand 378 states and 1138 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:48,531 INFO L93 Difference]: Finished difference Result 466 states and 1385 transitions. [2022-02-11 00:44:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:44:48,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:48,532 INFO L225 Difference]: With dead ends: 466 [2022-02-11 00:44:48,532 INFO L226 Difference]: Without dead ends: 457 [2022-02-11 00:44:48,532 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:44:48,533 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:48,533 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 36 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 375 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-02-11 00:44:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-02-11 00:44:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 381. [2022-02-11 00:44:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.0210526315789474) internal successors, (1148), 380 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1148 transitions. [2022-02-11 00:44:48,538 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1148 transitions. Word has length 20 [2022-02-11 00:44:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:48,538 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1148 transitions. [2022-02-11 00:44:48,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1148 transitions. [2022-02-11 00:44:48,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:48,538 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:48,539 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:48,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:48,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:48,739 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:48,739 INFO L85 PathProgramCache]: Analyzing trace with hash 575070988, now seen corresponding path program 18 times [2022-02-11 00:44:48,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:48,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495760971] [2022-02-11 00:44:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:48,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:48,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:48,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495760971] [2022-02-11 00:44:48,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495760971] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:48,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291298488] [2022-02-11 00:44:48,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:48,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:48,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:48,817 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) [2022-02-11 00:44:48,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 00:44:48,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:44:48,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:48,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:44:48,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:48,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:48,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:49,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:49,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:49,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-02-11 00:44:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:49,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291298488] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:49,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:49,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-02-11 00:44:49,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171206665] [2022-02-11 00:44:49,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:49,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:44:49,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:44:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:44:49,218 INFO L87 Difference]: Start difference. First operand 381 states and 1148 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:50,442 INFO L93 Difference]: Finished difference Result 665 states and 1934 transitions. [2022-02-11 00:44:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:44:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:50,444 INFO L225 Difference]: With dead ends: 665 [2022-02-11 00:44:50,444 INFO L226 Difference]: Without dead ends: 641 [2022-02-11 00:44:50,444 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=1816, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:44:50,444 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 230 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:50,444 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 86 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:44:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-02-11 00:44:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 392. [2022-02-11 00:44:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.040920716112532) internal successors, (1189), 391 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1189 transitions. [2022-02-11 00:44:50,450 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1189 transitions. Word has length 20 [2022-02-11 00:44:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:50,450 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1189 transitions. [2022-02-11 00:44:50,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1189 transitions. [2022-02-11 00:44:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:50,451 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:50,451 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:50,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:50,652 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,SelfDestructingSolverStorable54 [2022-02-11 00:44:50,652 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1405396663, now seen corresponding path program 17 times [2022-02-11 00:44:50,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:50,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814273235] [2022-02-11 00:44:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:50,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:50,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814273235] [2022-02-11 00:44:50,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814273235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:50,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556627581] [2022-02-11 00:44:50,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:50,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:50,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:50,741 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) [2022-02-11 00:44:50,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 00:44:50,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:44:50,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:50,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:50,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:50,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:44:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:50,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:50,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:50,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:50,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:50,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:51,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556627581] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:51,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:51,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:51,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540557008] [2022-02-11 00:44:51,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:51,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:51,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:51,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:51,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:51,033 INFO L87 Difference]: Start difference. First operand 392 states and 1189 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:51,207 INFO L93 Difference]: Finished difference Result 487 states and 1457 transitions. [2022-02-11 00:44:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:44:51,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:51,209 INFO L225 Difference]: With dead ends: 487 [2022-02-11 00:44:51,209 INFO L226 Difference]: Without dead ends: 476 [2022-02-11 00:44:51,209 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:44:51,209 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:51,209 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 33 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 336 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-02-11 00:44:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-02-11 00:44:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 398. [2022-02-11 00:44:51,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.0352644836272042) internal successors, (1205), 397 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1205 transitions. [2022-02-11 00:44:51,214 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1205 transitions. Word has length 20 [2022-02-11 00:44:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:51,214 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1205 transitions. [2022-02-11 00:44:51,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1205 transitions. [2022-02-11 00:44:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:51,215 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:51,215 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:51,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-11 00:44:51,416 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,SelfDestructingSolverStorable55 [2022-02-11 00:44:51,416 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:51,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1329561248, now seen corresponding path program 19 times [2022-02-11 00:44:51,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:51,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423224300] [2022-02-11 00:44:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:51,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:51,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:51,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423224300] [2022-02-11 00:44:51,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423224300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:51,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565301433] [2022-02-11 00:44:51,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:51,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:51,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:51,485 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) [2022-02-11 00:44:51,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 00:44:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:51,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:51,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:44:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:51,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:51,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:51,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:51,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:51,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565301433] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:51,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:51,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:51,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863937622] [2022-02-11 00:44:51,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:51,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:51,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:51,754 INFO L87 Difference]: Start difference. First operand 398 states and 1205 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:51,968 INFO L93 Difference]: Finished difference Result 469 states and 1405 transitions. [2022-02-11 00:44:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:44:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:51,969 INFO L225 Difference]: With dead ends: 469 [2022-02-11 00:44:51,969 INFO L226 Difference]: Without dead ends: 458 [2022-02-11 00:44:51,969 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:44:51,970 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:51,970 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 52 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-02-11 00:44:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-11 00:44:51,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 399. [2022-02-11 00:44:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0376884422110555) internal successors, (1209), 398 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1209 transitions. [2022-02-11 00:44:51,975 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1209 transitions. Word has length 20 [2022-02-11 00:44:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:51,975 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1209 transitions. [2022-02-11 00:44:51,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1209 transitions. [2022-02-11 00:44:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:51,976 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:51,976 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:51,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-11 00:44:52,176 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,SelfDestructingSolverStorable56 [2022-02-11 00:44:52,176 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash 705118312, now seen corresponding path program 20 times [2022-02-11 00:44:52,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:52,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573046212] [2022-02-11 00:44:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:52,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:52,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:52,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573046212] [2022-02-11 00:44:52,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573046212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:52,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753662989] [2022-02-11 00:44:52,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:52,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:52,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:52,254 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) [2022-02-11 00:44:52,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 00:44:52,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:52,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:52,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:52,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:52,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:52,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-02-11 00:44:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:52,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:52,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:52,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-02-11 00:44:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:52,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753662989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:52,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:52,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:44:52,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820873206] [2022-02-11 00:44:52,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:52,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:44:52,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:44:52,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:44:52,795 INFO L87 Difference]: Start difference. First operand 399 states and 1209 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) [2022-02-11 00:44:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:53,515 INFO L93 Difference]: Finished difference Result 663 states and 1893 transitions. [2022-02-11 00:44:53,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:44:53,515 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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 20 [2022-02-11 00:44:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:53,517 INFO L225 Difference]: With dead ends: 663 [2022-02-11 00:44:53,517 INFO L226 Difference]: Without dead ends: 610 [2022-02-11 00:44:53,517 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:44:53,517 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:53,517 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 80 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 822 Invalid, 0 Unknown, 322 Unchecked, 0.3s Time] [2022-02-11 00:44:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-11 00:44:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 400. [2022-02-11 00:44:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0426065162907268) internal successors, (1214), 399 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1214 transitions. [2022-02-11 00:44:53,523 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1214 transitions. Word has length 20 [2022-02-11 00:44:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:53,523 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1214 transitions. [2022-02-11 00:44:53,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) [2022-02-11 00:44:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1214 transitions. [2022-02-11 00:44:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:53,524 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:53,524 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:53,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:53,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:53,740 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash -422673061, now seen corresponding path program 18 times [2022-02-11 00:44:53,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:53,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654609145] [2022-02-11 00:44:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:53,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:53,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:53,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654609145] [2022-02-11 00:44:53,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654609145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:53,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284891400] [2022-02-11 00:44:53,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:53,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:53,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:53,817 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) [2022-02-11 00:44:53,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 00:44:53,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:44:53,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:53,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:53,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:53,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:53,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:54,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:54,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:54,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-02-11 00:44:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:54,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284891400] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:54,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:54,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-02-11 00:44:54,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347483347] [2022-02-11 00:44:54,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:54,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:44:54,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:44:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:44:54,285 INFO L87 Difference]: Start difference. First operand 400 states and 1214 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:56,153 INFO L93 Difference]: Finished difference Result 835 states and 2438 transitions. [2022-02-11 00:44:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:44:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:56,155 INFO L225 Difference]: With dead ends: 835 [2022-02-11 00:44:56,155 INFO L226 Difference]: Without dead ends: 806 [2022-02-11 00:44:56,156 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=690, Invalid=3216, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:44:56,156 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 362 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:56,156 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 89 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:44:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-02-11 00:44:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 401. [2022-02-11 00:44:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0425) internal successors, (1217), 400 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1217 transitions. [2022-02-11 00:44:56,163 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1217 transitions. Word has length 20 [2022-02-11 00:44:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:56,163 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1217 transitions. [2022-02-11 00:44:56,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1217 transitions. [2022-02-11 00:44:56,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:56,164 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:56,164 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:56,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-11 00:44:56,380 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,SelfDestructingSolverStorable58 [2022-02-11 00:44:56,380 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash -856702407, now seen corresponding path program 19 times [2022-02-11 00:44:56,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:56,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473125492] [2022-02-11 00:44:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:56,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:56,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:56,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473125492] [2022-02-11 00:44:56,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473125492] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:56,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014103651] [2022-02-11 00:44:56,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:56,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:56,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:56,460 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) [2022-02-11 00:44:56,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 00:44:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:56,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:56,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:56,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:56,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:56,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:56,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 00:44:56,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:56,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-02-11 00:44:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:56,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014103651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:56,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:56,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-11 00:44:56,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262984179] [2022-02-11 00:44:56,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:56,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:44:56,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:44:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:44:56,726 INFO L87 Difference]: Start difference. First operand 401 states and 1217 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:56,922 INFO L93 Difference]: Finished difference Result 506 states and 1512 transitions. [2022-02-11 00:44:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:44:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:56,924 INFO L225 Difference]: With dead ends: 506 [2022-02-11 00:44:56,924 INFO L226 Difference]: Without dead ends: 495 [2022-02-11 00:44:56,924 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:44:56,924 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:56,924 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 468 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-02-11 00:44:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-11 00:44:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 396. [2022-02-11 00:44:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.0405063291139243) internal successors, (1201), 395 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1201 transitions. [2022-02-11 00:44:56,929 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1201 transitions. Word has length 20 [2022-02-11 00:44:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:56,929 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1201 transitions. [2022-02-11 00:44:56,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1201 transitions. [2022-02-11 00:44:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:56,930 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:56,930 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:56,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:57,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-11 00:44:57,146 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1388007308, now seen corresponding path program 21 times [2022-02-11 00:44:57,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:57,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53538320] [2022-02-11 00:44:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:57,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:57,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53538320] [2022-02-11 00:44:57,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53538320] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:57,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710503143] [2022-02-11 00:44:57,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:57,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:57,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:57,220 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) [2022-02-11 00:44:57,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 00:44:57,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:44:57,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:57,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:57,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:57,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:57,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:57,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:57,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:57,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-02-11 00:44:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:57,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710503143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:57,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:57,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-02-11 00:44:57,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190723203] [2022-02-11 00:44:57,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:57,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:44:57,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:57,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:44:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:44:57,687 INFO L87 Difference]: Start difference. First operand 396 states and 1201 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2022-02-11 00:44:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:58,060 INFO L93 Difference]: Finished difference Result 552 states and 1638 transitions. [2022-02-11 00:44:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:44:58,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 20 [2022-02-11 00:44:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:58,062 INFO L225 Difference]: With dead ends: 552 [2022-02-11 00:44:58,062 INFO L226 Difference]: Without dead ends: 543 [2022-02-11 00:44:58,062 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:44:58,062 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:58,062 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 46 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 488 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-02-11 00:44:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-02-11 00:44:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 393. [2022-02-11 00:44:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.0331632653061225) internal successors, (1189), 392 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1189 transitions. [2022-02-11 00:44:58,068 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1189 transitions. Word has length 20 [2022-02-11 00:44:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:58,068 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1189 transitions. [2022-02-11 00:44:58,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2022-02-11 00:44:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1189 transitions. [2022-02-11 00:44:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:58,069 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:58,069 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:58,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:58,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:58,269 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:58,270 INFO L85 PathProgramCache]: Analyzing trace with hash 377918803, now seen corresponding path program 20 times [2022-02-11 00:44:58,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:58,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333488785] [2022-02-11 00:44:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:58,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:58,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:58,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333488785] [2022-02-11 00:44:58,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333488785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:58,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256541824] [2022-02-11 00:44:58,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:58,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:58,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:58,337 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) [2022-02-11 00:44:58,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 00:44:58,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:58,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:58,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:58,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:44:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:58,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:58,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:58,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:44:58,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:58,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:44:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:58,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256541824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:58,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:58,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:44:58,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178818507] [2022-02-11 00:44:58,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:58,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:44:58,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:44:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:44:58,599 INFO L87 Difference]: Start difference. First operand 393 states and 1189 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:58,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:58,890 INFO L93 Difference]: Finished difference Result 540 states and 1607 transitions. [2022-02-11 00:44:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:44:58,890 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:44:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:58,891 INFO L225 Difference]: With dead ends: 540 [2022-02-11 00:44:58,891 INFO L226 Difference]: Without dead ends: 530 [2022-02-11 00:44:58,891 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:44:58,892 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:58,892 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 68 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 655 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-02-11 00:44:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-02-11 00:44:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 396. [2022-02-11 00:44:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.027848101265823) internal successors, (1196), 395 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1196 transitions. [2022-02-11 00:44:58,897 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1196 transitions. Word has length 20 [2022-02-11 00:44:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:58,897 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1196 transitions. [2022-02-11 00:44:58,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1196 transitions. [2022-02-11 00:44:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:44:58,898 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:58,898 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:58,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:59,098 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,SelfDestructingSolverStorable61 [2022-02-11 00:44:59,098 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:44:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1374169437, now seen corresponding path program 21 times [2022-02-11 00:44:59,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:59,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677972138] [2022-02-11 00:44:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:59,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:59,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:59,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677972138] [2022-02-11 00:44:59,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677972138] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:59,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068530848] [2022-02-11 00:44:59,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:59,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:59,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:59,170 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) [2022-02-11 00:44:59,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 00:44:59,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:44:59,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:59,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:44:59,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:59,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:59,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-02-11 00:44:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:59,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:59,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:59,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-02-11 00:44:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:59,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068530848] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:59,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:59,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-11 00:44:59,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563002097] [2022-02-11 00:44:59,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:59,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:44:59,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:59,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:44:59,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:44:59,668 INFO L87 Difference]: Start difference. First operand 396 states and 1196 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) [2022-02-11 00:45:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:00,210 INFO L93 Difference]: Finished difference Result 576 states and 1697 transitions. [2022-02-11 00:45:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:45:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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 20 [2022-02-11 00:45:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:00,211 INFO L225 Difference]: With dead ends: 576 [2022-02-11 00:45:00,211 INFO L226 Difference]: Without dead ends: 565 [2022-02-11 00:45:00,211 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:45:00,212 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:00,212 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 118 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 880 Invalid, 0 Unknown, 332 Unchecked, 0.3s Time] [2022-02-11 00:45:00,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-02-11 00:45:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 399. [2022-02-11 00:45:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.027638190954774) internal successors, (1205), 398 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1205 transitions. [2022-02-11 00:45:00,217 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1205 transitions. Word has length 20 [2022-02-11 00:45:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:00,217 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1205 transitions. [2022-02-11 00:45:00,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) [2022-02-11 00:45:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1205 transitions. [2022-02-11 00:45:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:45:00,218 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:00,218 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:00,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-11 00:45:00,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:00,434 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:00,434 INFO L85 PathProgramCache]: Analyzing trace with hash 646299815, now seen corresponding path program 22 times [2022-02-11 00:45:00,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:00,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804927728] [2022-02-11 00:45:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:00,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:00,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:00,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804927728] [2022-02-11 00:45:00,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804927728] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:00,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951911421] [2022-02-11 00:45:00,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:00,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:00,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:00,495 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) [2022-02-11 00:45:00,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 00:45:00,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:00,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:00,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:45:00,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:00,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:00,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:45:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:00,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:00,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:00,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:45:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:00,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:45:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:00,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951911421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:00,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:00,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:45:00,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576903765] [2022-02-11 00:45:00,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:00,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:45:00,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:00,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:45:00,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:00,763 INFO L87 Difference]: Start difference. First operand 399 states and 1205 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-02-11 00:45:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:01,083 INFO L93 Difference]: Finished difference Result 558 states and 1655 transitions. [2022-02-11 00:45:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:45:01,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 20 [2022-02-11 00:45:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:01,086 INFO L225 Difference]: With dead ends: 558 [2022-02-11 00:45:01,086 INFO L226 Difference]: Without dead ends: 549 [2022-02-11 00:45:01,086 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:01,086 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:01,086 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 68 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 703 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-02-11 00:45:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-02-11 00:45:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 397. [2022-02-11 00:45:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0277777777777777) internal successors, (1199), 396 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1199 transitions. [2022-02-11 00:45:01,092 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1199 transitions. Word has length 20 [2022-02-11 00:45:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:01,092 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1199 transitions. [2022-02-11 00:45:01,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-02-11 00:45:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1199 transitions. [2022-02-11 00:45:01,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:45:01,093 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:01,093 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:01,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:01,307 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,SelfDestructingSolverStorable63 [2022-02-11 00:45:01,308 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:01,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1704598050, now seen corresponding path program 22 times [2022-02-11 00:45:01,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:01,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752477815] [2022-02-11 00:45:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:01,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:01,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:01,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752477815] [2022-02-11 00:45:01,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752477815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:01,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872320497] [2022-02-11 00:45:01,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:01,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:01,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:01,384 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) [2022-02-11 00:45:01,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:01,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 00:45:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:45:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:01,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:01,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:45:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:01,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:01,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:01,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:45:01,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:01,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:45:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:01,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872320497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:01,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:01,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:45:01,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318353019] [2022-02-11 00:45:01,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:01,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:45:01,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:01,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:45:01,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:01,665 INFO L87 Difference]: Start difference. First operand 397 states and 1199 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2022-02-11 00:45:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:01,966 INFO L93 Difference]: Finished difference Result 523 states and 1556 transitions. [2022-02-11 00:45:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:45:01,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 20 [2022-02-11 00:45:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:01,967 INFO L225 Difference]: With dead ends: 523 [2022-02-11 00:45:01,967 INFO L226 Difference]: Without dead ends: 514 [2022-02-11 00:45:01,968 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:01,968 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:01,968 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 73 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 718 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-02-11 00:45:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-11 00:45:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 400. [2022-02-11 00:45:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.030075187969925) internal successors, (1209), 399 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1209 transitions. [2022-02-11 00:45:01,973 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1209 transitions. Word has length 20 [2022-02-11 00:45:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:01,973 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1209 transitions. [2022-02-11 00:45:01,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2022-02-11 00:45:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1209 transitions. [2022-02-11 00:45:01,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:45:01,974 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:01,974 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:01,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:02,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:02,175 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:02,175 INFO L85 PathProgramCache]: Analyzing trace with hash -636309374, now seen corresponding path program 23 times [2022-02-11 00:45:02,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:02,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449568590] [2022-02-11 00:45:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:02,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:02,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:02,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449568590] [2022-02-11 00:45:02,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449568590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:02,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300738636] [2022-02-11 00:45:02,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:02,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:02,238 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) [2022-02-11 00:45:02,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 00:45:02,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:02,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:02,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:45:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:02,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:02,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 00:45:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:02,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:02,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:02,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:45:02,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:02,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:45:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:02,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300738636] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:02,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:02,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:45:02,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495692086] [2022-02-11 00:45:02,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:02,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:45:02,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:45:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:02,508 INFO L87 Difference]: Start difference. First operand 400 states and 1209 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2022-02-11 00:45:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:02,783 INFO L93 Difference]: Finished difference Result 520 states and 1552 transitions. [2022-02-11 00:45:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:45:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 20 [2022-02-11 00:45:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:02,785 INFO L225 Difference]: With dead ends: 520 [2022-02-11 00:45:02,785 INFO L226 Difference]: Without dead ends: 509 [2022-02-11 00:45:02,785 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:45:02,785 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:02,785 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 62 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 670 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-02-11 00:45:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-11 00:45:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2022-02-11 00:45:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0277777777777777) internal successors, (1199), 396 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1199 transitions. [2022-02-11 00:45:02,790 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1199 transitions. Word has length 20 [2022-02-11 00:45:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:02,791 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1199 transitions. [2022-02-11 00:45:02,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2022-02-11 00:45:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1199 transitions. [2022-02-11 00:45:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:45:02,791 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:02,791 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:02,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:03,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:03,007 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:03,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:03,007 INFO L85 PathProgramCache]: Analyzing trace with hash 194016301, now seen corresponding path program 23 times [2022-02-11 00:45:03,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:03,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368804369] [2022-02-11 00:45:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:03,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:03,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:03,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368804369] [2022-02-11 00:45:03,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368804369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:03,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028119029] [2022-02-11 00:45:03,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:03,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:03,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:03,077 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) [2022-02-11 00:45:03,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 00:45:03,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:03,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:45:03,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:03,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:03,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:45:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:03,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:03,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:03,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:45:03,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:03,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:45:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:03,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028119029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:03,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:03,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:45:03,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296618597] [2022-02-11 00:45:03,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:03,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:45:03,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:45:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:03,350 INFO L87 Difference]: Start difference. First operand 397 states and 1199 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:03,606 INFO L93 Difference]: Finished difference Result 528 states and 1574 transitions. [2022-02-11 00:45:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:45:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:45:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:03,608 INFO L225 Difference]: With dead ends: 528 [2022-02-11 00:45:03,608 INFO L226 Difference]: Without dead ends: 517 [2022-02-11 00:45:03,608 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:45:03,608 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:03,608 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 60 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 578 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-02-11 00:45:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-02-11 00:45:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 399. [2022-02-11 00:45:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0326633165829144) internal successors, (1207), 398 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1207 transitions. [2022-02-11 00:45:03,614 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1207 transitions. Word has length 20 [2022-02-11 00:45:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:03,614 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1207 transitions. [2022-02-11 00:45:03,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1207 transitions. [2022-02-11 00:45:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:45:03,615 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:03,615 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:03,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:03,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:03,828 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash 118180886, now seen corresponding path program 24 times [2022-02-11 00:45:03,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:03,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197284465] [2022-02-11 00:45:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:03,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:03,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197284465] [2022-02-11 00:45:03,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197284465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:03,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72705279] [2022-02-11 00:45:03,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:03,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:03,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:03,893 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) [2022-02-11 00:45:03,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 00:45:03,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:03,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:03,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:03,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:04,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:04,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-02-11 00:45:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:04,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:04,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-02-11 00:45:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:04,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72705279] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:04,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:04,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-02-11 00:45:04,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467086974] [2022-02-11 00:45:04,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:04,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:45:04,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:04,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:45:04,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:04,341 INFO L87 Difference]: Start difference. First operand 399 states and 1207 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:05,427 INFO L93 Difference]: Finished difference Result 602 states and 1788 transitions. [2022-02-11 00:45:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:45:05,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:45:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:05,428 INFO L225 Difference]: With dead ends: 602 [2022-02-11 00:45:05,428 INFO L226 Difference]: Without dead ends: 589 [2022-02-11 00:45:05,428 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:45:05,428 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 179 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:05,429 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 99 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1514 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-02-11 00:45:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-02-11 00:45:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 403. [2022-02-11 00:45:05,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.027363184079602) internal successors, (1217), 402 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1217 transitions. [2022-02-11 00:45:05,434 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1217 transitions. Word has length 20 [2022-02-11 00:45:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:05,434 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1217 transitions. [2022-02-11 00:45:05,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1217 transitions. [2022-02-11 00:45:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:45:05,435 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:05,435 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:05,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:05,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:05,636 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:05,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:05,636 INFO L85 PathProgramCache]: Analyzing trace with hash 881657575, now seen corresponding path program 24 times [2022-02-11 00:45:05,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:05,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879712588] [2022-02-11 00:45:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:05,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:05,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:05,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879712588] [2022-02-11 00:45:05,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879712588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:05,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750887815] [2022-02-11 00:45:05,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:05,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:05,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:05,707 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) [2022-02-11 00:45:05,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 00:45:05,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:45:05,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:45:05,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:05,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:45:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:05,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:05,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:05,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:45:05,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:05,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:45:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:05,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750887815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:05,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:05,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-02-11 00:45:05,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619008270] [2022-02-11 00:45:05,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:05,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:45:05,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:05,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:45:05,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:05,973 INFO L87 Difference]: Start difference. First operand 403 states and 1217 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:06,203 INFO L93 Difference]: Finished difference Result 537 states and 1583 transitions. [2022-02-11 00:45:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:45:06,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:45:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:06,204 INFO L225 Difference]: With dead ends: 537 [2022-02-11 00:45:06,204 INFO L226 Difference]: Without dead ends: 526 [2022-02-11 00:45:06,204 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:45:06,204 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:06,204 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 47 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-02-11 00:45:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-02-11 00:45:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 404. [2022-02-11 00:45:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0248138957816377) internal successors, (1219), 403 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1219 transitions. [2022-02-11 00:45:06,210 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1219 transitions. Word has length 20 [2022-02-11 00:45:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:06,210 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1219 transitions. [2022-02-11 00:45:06,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1219 transitions. [2022-02-11 00:45:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:45:06,210 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:06,210 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:06,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:06,426 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,SelfDestructingSolverStorable68 [2022-02-11 00:45:06,426 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:06,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1555083579, now seen corresponding path program 25 times [2022-02-11 00:45:06,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:06,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886341752] [2022-02-11 00:45:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:06,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:06,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:06,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886341752] [2022-02-11 00:45:06,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886341752] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:06,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154537743] [2022-02-11 00:45:06,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:06,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:06,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:06,496 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) [2022-02-11 00:45:06,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 00:45:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:45:06,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:06,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:06,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:45:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:06,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:06,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:06,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:45:06,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:06,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:45:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:06,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154537743] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:06,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:06,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:45:06,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586711739] [2022-02-11 00:45:06,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:06,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:45:06,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:45:06,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:06,776 INFO L87 Difference]: Start difference. First operand 404 states and 1219 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:07,058 INFO L93 Difference]: Finished difference Result 553 states and 1642 transitions. [2022-02-11 00:45:07,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:45:07,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:45:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:07,059 INFO L225 Difference]: With dead ends: 553 [2022-02-11 00:45:07,059 INFO L226 Difference]: Without dead ends: 542 [2022-02-11 00:45:07,059 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:45:07,060 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:07,060 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 61 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 577 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-02-11 00:45:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-02-11 00:45:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 400. [2022-02-11 00:45:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0325814536340854) internal successors, (1210), 399 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1210 transitions. [2022-02-11 00:45:07,066 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1210 transitions. Word has length 20 [2022-02-11 00:45:07,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:07,066 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1210 transitions. [2022-02-11 00:45:07,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,066 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1210 transitions. [2022-02-11 00:45:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:45:07,066 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:07,066 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:07,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:07,278 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,SelfDestructingSolverStorable69 [2022-02-11 00:45:07,278 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash -426527609, now seen corresponding path program 26 times [2022-02-11 00:45:07,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:07,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254060914] [2022-02-11 00:45:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:07,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:07,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:07,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254060914] [2022-02-11 00:45:07,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254060914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:07,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791165079] [2022-02-11 00:45:07,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:07,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:07,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:07,343 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) [2022-02-11 00:45:07,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 00:45:07,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:07,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:45:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:07,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:07,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:45:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:07,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:07,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:07,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:45:07,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:07,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:45:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:07,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791165079] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:07,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:07,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:45:07,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660848144] [2022-02-11 00:45:07,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:07,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:45:07,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:45:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:07,599 INFO L87 Difference]: Start difference. First operand 400 states and 1210 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:07,988 INFO L93 Difference]: Finished difference Result 616 states and 1815 transitions. [2022-02-11 00:45:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:45:07,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:45:07,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:07,990 INFO L225 Difference]: With dead ends: 616 [2022-02-11 00:45:07,990 INFO L226 Difference]: Without dead ends: 605 [2022-02-11 00:45:07,990 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:45:07,990 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:07,990 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 105 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 872 Invalid, 0 Unknown, 183 Unchecked, 0.3s Time] [2022-02-11 00:45:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-02-11 00:45:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 408. [2022-02-11 00:45:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.022113022113022) internal successors, (1230), 407 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1230 transitions. [2022-02-11 00:45:07,996 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1230 transitions. Word has length 20 [2022-02-11 00:45:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:07,996 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1230 transitions. [2022-02-11 00:45:07,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1230 transitions. [2022-02-11 00:45:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:45:07,997 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:07,997 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:08,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-11 00:45:08,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:08,197 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash -493705572, now seen corresponding path program 25 times [2022-02-11 00:45:08,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:08,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265209519] [2022-02-11 00:45:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:08,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:08,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:08,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265209519] [2022-02-11 00:45:08,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265209519] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:08,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74539038] [2022-02-11 00:45:08,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:08,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:08,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:08,270 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) [2022-02-11 00:45:08,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 00:45:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:45:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:08,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:08,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-02-11 00:45:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:08,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:08,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:08,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-02-11 00:45:08,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:08,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 00:45:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:08,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74539038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:08,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:08,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:45:08,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916951034] [2022-02-11 00:45:08,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:08,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:45:08,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:45:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:08,534 INFO L87 Difference]: Start difference. First operand 408 states and 1230 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:08,910 INFO L93 Difference]: Finished difference Result 607 states and 1791 transitions. [2022-02-11 00:45:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:45:08,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:45:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:08,912 INFO L225 Difference]: With dead ends: 607 [2022-02-11 00:45:08,912 INFO L226 Difference]: Without dead ends: 596 [2022-02-11 00:45:08,912 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:45:08,912 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:08,912 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 96 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 764 Invalid, 0 Unknown, 277 Unchecked, 0.3s Time] [2022-02-11 00:45:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-02-11 00:45:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 402. [2022-02-11 00:45:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.027431421446384) internal successors, (1214), 401 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1214 transitions. [2022-02-11 00:45:08,918 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1214 transitions. Word has length 20 [2022-02-11 00:45:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:08,918 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1214 transitions. [2022-02-11 00:45:08,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1214 transitions. [2022-02-11 00:45:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:08,919 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:08,919 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:08,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-11 00:45:09,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:09,119 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash 940655469, now seen corresponding path program 27 times [2022-02-11 00:45:09,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:09,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771053780] [2022-02-11 00:45:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:09,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:09,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:09,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771053780] [2022-02-11 00:45:09,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771053780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:09,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219567531] [2022-02-11 00:45:09,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:09,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:09,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:09,148 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) [2022-02-11 00:45:09,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 00:45:09,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:09,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:09,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:09,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:09,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:09,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219567531] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:09,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:09,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-11 00:45:09,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017958437] [2022-02-11 00:45:09,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:09,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:45:09,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:45:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:45:09,248 INFO L87 Difference]: Start difference. First operand 402 states and 1214 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:09,334 INFO L93 Difference]: Finished difference Result 599 states and 1760 transitions. [2022-02-11 00:45:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:45:09,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:09,335 INFO L225 Difference]: With dead ends: 599 [2022-02-11 00:45:09,335 INFO L226 Difference]: Without dead ends: 599 [2022-02-11 00:45:09,335 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:45:09,337 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:09,337 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 59 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-02-11 00:45:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 335. [2022-02-11 00:45:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.086826347305389) internal successors, (1031), 334 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2022-02-11 00:45:09,342 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 22 [2022-02-11 00:45:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:09,342 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2022-02-11 00:45:09,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2022-02-11 00:45:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:09,343 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:09,343 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:09,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-11 00:45:09,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:09,550 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:09,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:09,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1281362867, now seen corresponding path program 28 times [2022-02-11 00:45:09,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:09,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422978703] [2022-02-11 00:45:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:09,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:09,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:09,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422978703] [2022-02-11 00:45:09,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422978703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:09,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174833491] [2022-02-11 00:45:09,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:09,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:09,575 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) [2022-02-11 00:45:09,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 00:45:09,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:09,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:09,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:09,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:09,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:09,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174833491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:09,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:09,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-11 00:45:09,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335142358] [2022-02-11 00:45:09,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:09,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:45:09,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:09,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:45:09,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:45:09,671 INFO L87 Difference]: Start difference. First operand 335 states and 1031 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:09,798 INFO L93 Difference]: Finished difference Result 500 states and 1455 transitions. [2022-02-11 00:45:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:45:09,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:09,799 INFO L225 Difference]: With dead ends: 500 [2022-02-11 00:45:09,799 INFO L226 Difference]: Without dead ends: 441 [2022-02-11 00:45:09,800 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:09,800 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 99 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:09,800 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 80 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-02-11 00:45:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 335. [2022-02-11 00:45:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.05688622754491) internal successors, (1021), 334 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1021 transitions. [2022-02-11 00:45:09,804 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1021 transitions. Word has length 22 [2022-02-11 00:45:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:09,804 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1021 transitions. [2022-02-11 00:45:09,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1021 transitions. [2022-02-11 00:45:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:09,805 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:09,805 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:09,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:10,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:10,005 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:10,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:10,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1556134201, now seen corresponding path program 29 times [2022-02-11 00:45:10,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:10,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320218065] [2022-02-11 00:45:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:10,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:10,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:10,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320218065] [2022-02-11 00:45:10,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320218065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:10,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952752100] [2022-02-11 00:45:10,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:10,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:10,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:10,029 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) [2022-02-11 00:45:10,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 00:45:10,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:10,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:10,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:10,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:10,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:10,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952752100] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:10,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:10,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:10,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983592856] [2022-02-11 00:45:10,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:10,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:10,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:10,168 INFO L87 Difference]: Start difference. First operand 335 states and 1021 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:10,296 INFO L93 Difference]: Finished difference Result 661 states and 1944 transitions. [2022-02-11 00:45:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:45:10,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:10,297 INFO L225 Difference]: With dead ends: 661 [2022-02-11 00:45:10,298 INFO L226 Difference]: Without dead ends: 661 [2022-02-11 00:45:10,298 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:45:10,298 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 153 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:10,298 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 68 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-02-11 00:45:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 389. [2022-02-11 00:45:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.1211340206185567) internal successors, (1211), 388 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1211 transitions. [2022-02-11 00:45:10,303 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1211 transitions. Word has length 22 [2022-02-11 00:45:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:10,303 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1211 transitions. [2022-02-11 00:45:10,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1211 transitions. [2022-02-11 00:45:10,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:10,304 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:10,304 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:10,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-11 00:45:10,504 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,SelfDestructingSolverStorable74 [2022-02-11 00:45:10,505 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:10,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1860149017, now seen corresponding path program 30 times [2022-02-11 00:45:10,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:10,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665393934] [2022-02-11 00:45:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:10,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:10,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:10,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665393934] [2022-02-11 00:45:10,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665393934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:10,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234659640] [2022-02-11 00:45:10,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:10,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:10,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:10,527 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) [2022-02-11 00:45:10,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 00:45:10,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:10,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:10,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:10,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:10,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234659640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:10,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:10,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:10,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802087073] [2022-02-11 00:45:10,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:10,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:10,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:10,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:10,636 INFO L87 Difference]: Start difference. First operand 389 states and 1211 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:10,852 INFO L93 Difference]: Finished difference Result 721 states and 2031 transitions. [2022-02-11 00:45:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:45:10,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:10,854 INFO L225 Difference]: With dead ends: 721 [2022-02-11 00:45:10,854 INFO L226 Difference]: Without dead ends: 685 [2022-02-11 00:45:10,854 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:10,854 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 173 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:10,854 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 112 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:45:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-02-11 00:45:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 493. [2022-02-11 00:45:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.0792682926829267) internal successors, (1515), 492 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1515 transitions. [2022-02-11 00:45:10,861 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1515 transitions. Word has length 22 [2022-02-11 00:45:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:10,861 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1515 transitions. [2022-02-11 00:45:10,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1515 transitions. [2022-02-11 00:45:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:10,862 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:10,862 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:10,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:11,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:11,075 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1623645695, now seen corresponding path program 31 times [2022-02-11 00:45:11,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:11,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024917657] [2022-02-11 00:45:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:11,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:11,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024917657] [2022-02-11 00:45:11,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024917657] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:11,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000501021] [2022-02-11 00:45:11,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:11,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:11,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:11,100 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) [2022-02-11 00:45:11,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 00:45:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:11,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:11,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:11,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:11,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000501021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:11,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:11,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:11,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344410456] [2022-02-11 00:45:11,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:11,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:11,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:11,213 INFO L87 Difference]: Start difference. First operand 493 states and 1515 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:11,360 INFO L93 Difference]: Finished difference Result 955 states and 2765 transitions. [2022-02-11 00:45:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:45:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:11,362 INFO L225 Difference]: With dead ends: 955 [2022-02-11 00:45:11,362 INFO L226 Difference]: Without dead ends: 955 [2022-02-11 00:45:11,362 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:45:11,362 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 140 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:11,362 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 90 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-02-11 00:45:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 537. [2022-02-11 00:45:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.173507462686567) internal successors, (1701), 536 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1701 transitions. [2022-02-11 00:45:11,370 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1701 transitions. Word has length 22 [2022-02-11 00:45:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:11,370 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1701 transitions. [2022-02-11 00:45:11,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1701 transitions. [2022-02-11 00:45:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:11,371 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:11,371 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:11,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:11,571 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,SelfDestructingSolverStorable76 [2022-02-11 00:45:11,572 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:11,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1746864421, now seen corresponding path program 32 times [2022-02-11 00:45:11,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:11,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21982817] [2022-02-11 00:45:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:11,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:11,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:11,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21982817] [2022-02-11 00:45:11,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21982817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:11,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913224012] [2022-02-11 00:45:11,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:11,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:11,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:11,594 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) [2022-02-11 00:45:11,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 00:45:11,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:11,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:11,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:11,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:11,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913224012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:11,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:11,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:11,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231280759] [2022-02-11 00:45:11,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:11,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:11,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:11,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:11,718 INFO L87 Difference]: Start difference. First operand 537 states and 1701 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:11,933 INFO L93 Difference]: Finished difference Result 855 states and 2523 transitions. [2022-02-11 00:45:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:45:11,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:11,934 INFO L225 Difference]: With dead ends: 855 [2022-02-11 00:45:11,934 INFO L226 Difference]: Without dead ends: 831 [2022-02-11 00:45:11,934 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:11,935 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 158 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:11,935 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 117 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:45:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-02-11 00:45:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 569. [2022-02-11 00:45:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.214788732394366) internal successors, (1826), 568 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1826 transitions. [2022-02-11 00:45:11,943 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1826 transitions. Word has length 22 [2022-02-11 00:45:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:11,943 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1826 transitions. [2022-02-11 00:45:11,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1826 transitions. [2022-02-11 00:45:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:11,944 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:11,944 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:11,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:12,144 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,SelfDestructingSolverStorable77 [2022-02-11 00:45:12,144 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:12,145 INFO L85 PathProgramCache]: Analyzing trace with hash 676108133, now seen corresponding path program 33 times [2022-02-11 00:45:12,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:12,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160185980] [2022-02-11 00:45:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:12,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:12,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160185980] [2022-02-11 00:45:12,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160185980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:12,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723549238] [2022-02-11 00:45:12,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:12,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:12,169 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:12,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 00:45:12,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:12,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:12,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:12,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723549238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:12,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:12,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:12,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948816790] [2022-02-11 00:45:12,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:12,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:12,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:12,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:12,269 INFO L87 Difference]: Start difference. First operand 569 states and 1826 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:12,414 INFO L93 Difference]: Finished difference Result 818 states and 2433 transitions. [2022-02-11 00:45:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:45:12,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:12,416 INFO L225 Difference]: With dead ends: 818 [2022-02-11 00:45:12,416 INFO L226 Difference]: Without dead ends: 797 [2022-02-11 00:45:12,416 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:12,416 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 122 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:12,416 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 97 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-02-11 00:45:12,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 538. [2022-02-11 00:45:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 3.2309124767225326) internal successors, (1735), 537 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1735 transitions. [2022-02-11 00:45:12,427 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1735 transitions. Word has length 22 [2022-02-11 00:45:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:12,427 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1735 transitions. [2022-02-11 00:45:12,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1735 transitions. [2022-02-11 00:45:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:12,428 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:12,428 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:12,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-11 00:45:12,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-11 00:45:12,629 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1388287935, now seen corresponding path program 34 times [2022-02-11 00:45:12,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:12,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312220403] [2022-02-11 00:45:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:12,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:12,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312220403] [2022-02-11 00:45:12,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312220403] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:12,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679428680] [2022-02-11 00:45:12,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:12,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:12,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:12,664 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:12,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 00:45:12,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:12,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:12,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:12,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:12,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679428680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:12,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:12,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:12,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685376272] [2022-02-11 00:45:12,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:12,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:12,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:12,762 INFO L87 Difference]: Start difference. First operand 538 states and 1735 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:12,941 INFO L93 Difference]: Finished difference Result 813 states and 2443 transitions. [2022-02-11 00:45:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:45:12,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:12,942 INFO L225 Difference]: With dead ends: 813 [2022-02-11 00:45:12,942 INFO L226 Difference]: Without dead ends: 803 [2022-02-11 00:45:12,943 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:45:12,943 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:12,943 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 115 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-02-11 00:45:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 544. [2022-02-11 00:45:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.2081031307550645) internal successors, (1742), 543 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1742 transitions. [2022-02-11 00:45:12,962 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1742 transitions. Word has length 22 [2022-02-11 00:45:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:12,962 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1742 transitions. [2022-02-11 00:45:12,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1742 transitions. [2022-02-11 00:45:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:12,963 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:12,963 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:12,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:13,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-11 00:45:13,163 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:13,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1312956920, now seen corresponding path program 3 times [2022-02-11 00:45:13,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:13,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864295071] [2022-02-11 00:45:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:13,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:13,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:13,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864295071] [2022-02-11 00:45:13,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864295071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:13,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732058990] [2022-02-11 00:45:13,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:13,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:13,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:13,190 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:13,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 00:45:13,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:13,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:13,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:13,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:13,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732058990] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:13,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:13,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 00:45:13,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774007354] [2022-02-11 00:45:13,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:13,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:45:13,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:45:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:45:13,313 INFO L87 Difference]: Start difference. First operand 544 states and 1742 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:13,505 INFO L93 Difference]: Finished difference Result 1170 states and 3502 transitions. [2022-02-11 00:45:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:45:13,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:13,507 INFO L225 Difference]: With dead ends: 1170 [2022-02-11 00:45:13,507 INFO L226 Difference]: Without dead ends: 1170 [2022-02-11 00:45:13,507 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:13,507 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 163 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:13,507 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 120 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-02-11 00:45:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 535. [2022-02-11 00:45:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 3.254681647940075) internal successors, (1738), 534 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1738 transitions. [2022-02-11 00:45:13,516 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1738 transitions. Word has length 22 [2022-02-11 00:45:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:13,516 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1738 transitions. [2022-02-11 00:45:13,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1738 transitions. [2022-02-11 00:45:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:13,517 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:13,517 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:13,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-11 00:45:13,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:13,717 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash 660903613, now seen corresponding path program 35 times [2022-02-11 00:45:13,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:13,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153213187] [2022-02-11 00:45:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:13,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:13,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:13,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153213187] [2022-02-11 00:45:13,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153213187] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:13,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524408453] [2022-02-11 00:45:13,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:13,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:13,737 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:13,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 00:45:13,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:45:13,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:13,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:13,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:13,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524408453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:13,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:13,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-11 00:45:13,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315521778] [2022-02-11 00:45:13,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:13,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:13,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:13,858 INFO L87 Difference]: Start difference. First operand 535 states and 1738 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:14,024 INFO L93 Difference]: Finished difference Result 1254 states and 3793 transitions. [2022-02-11 00:45:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:45:14,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:14,027 INFO L225 Difference]: With dead ends: 1254 [2022-02-11 00:45:14,027 INFO L226 Difference]: Without dead ends: 1254 [2022-02-11 00:45:14,027 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:45:14,027 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:14,027 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 114 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-02-11 00:45:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 651. [2022-02-11 00:45:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.3784615384615386) internal successors, (2196), 650 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2196 transitions. [2022-02-11 00:45:14,037 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2196 transitions. Word has length 22 [2022-02-11 00:45:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:14,037 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 2196 transitions. [2022-02-11 00:45:14,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2196 transitions. [2022-02-11 00:45:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:14,038 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:14,038 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:14,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-02-11 00:45:14,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:14,239 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash 896261373, now seen corresponding path program 36 times [2022-02-11 00:45:14,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:14,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178140429] [2022-02-11 00:45:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:14,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:14,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:14,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178140429] [2022-02-11 00:45:14,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178140429] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:14,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260977108] [2022-02-11 00:45:14,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:14,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:14,267 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:14,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 00:45:14,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:45:14,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:14,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:14,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:14,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:14,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260977108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:14,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:14,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-11 00:45:14,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24544151] [2022-02-11 00:45:14,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:14,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:14,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:14,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:14,406 INFO L87 Difference]: Start difference. First operand 651 states and 2196 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:14,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:14,616 INFO L93 Difference]: Finished difference Result 1121 states and 3415 transitions. [2022-02-11 00:45:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:45:14,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:14,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:14,618 INFO L225 Difference]: With dead ends: 1121 [2022-02-11 00:45:14,618 INFO L226 Difference]: Without dead ends: 1116 [2022-02-11 00:45:14,618 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:45:14,619 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 167 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:14,619 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 110 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-02-11 00:45:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 651. [2022-02-11 00:45:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.370769230769231) internal successors, (2191), 650 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2191 transitions. [2022-02-11 00:45:14,628 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2191 transitions. Word has length 22 [2022-02-11 00:45:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:14,629 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 2191 transitions. [2022-02-11 00:45:14,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:14,629 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2191 transitions. [2022-02-11 00:45:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:14,630 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:14,630 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:14,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:14,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:14,830 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:14,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:14,830 INFO L85 PathProgramCache]: Analyzing trace with hash 412104765, now seen corresponding path program 37 times [2022-02-11 00:45:14,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:14,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260158864] [2022-02-11 00:45:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:14,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:14,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:14,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260158864] [2022-02-11 00:45:14,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260158864] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:14,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63407516] [2022-02-11 00:45:14,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:14,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:14,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:14,856 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:14,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 00:45:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:14,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:14,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:14,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63407516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:14,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:14,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 00:45:14,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936201588] [2022-02-11 00:45:14,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:14,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:45:14,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:45:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:45:14,970 INFO L87 Difference]: Start difference. First operand 651 states and 2191 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:15,142 INFO L93 Difference]: Finished difference Result 1135 states and 3572 transitions. [2022-02-11 00:45:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:45:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:15,144 INFO L225 Difference]: With dead ends: 1135 [2022-02-11 00:45:15,144 INFO L226 Difference]: Without dead ends: 1127 [2022-02-11 00:45:15,144 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:45:15,144 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:15,145 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 92 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-02-11 00:45:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 732. [2022-02-11 00:45:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.4254445964432283) internal successors, (2504), 731 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2504 transitions. [2022-02-11 00:45:15,155 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2504 transitions. Word has length 22 [2022-02-11 00:45:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:15,156 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2504 transitions. [2022-02-11 00:45:15,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2504 transitions. [2022-02-11 00:45:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:15,157 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:15,157 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:15,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:15,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-02-11 00:45:15,357 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:15,358 INFO L85 PathProgramCache]: Analyzing trace with hash -235488933, now seen corresponding path program 38 times [2022-02-11 00:45:15,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:15,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110078797] [2022-02-11 00:45:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:15,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:15,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:15,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110078797] [2022-02-11 00:45:15,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110078797] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:15,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813669169] [2022-02-11 00:45:15,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:15,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:15,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:15,383 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:15,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 00:45:15,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:15,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:15,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:15,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:15,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:15,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813669169] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:15,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:15,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 00:45:15,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456022251] [2022-02-11 00:45:15,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:15,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:45:15,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:45:15,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:45:15,509 INFO L87 Difference]: Start difference. First operand 732 states and 2504 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:15,725 INFO L93 Difference]: Finished difference Result 1172 states and 3674 transitions. [2022-02-11 00:45:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:45:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:15,727 INFO L225 Difference]: With dead ends: 1172 [2022-02-11 00:45:15,730 INFO L226 Difference]: Without dead ends: 1172 [2022-02-11 00:45:15,730 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:45:15,730 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:15,730 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 200 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:45:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-02-11 00:45:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 754. [2022-02-11 00:45:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.4648074369189907) internal successors, (2609), 753 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2609 transitions. [2022-02-11 00:45:15,741 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2609 transitions. Word has length 22 [2022-02-11 00:45:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:15,741 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2609 transitions. [2022-02-11 00:45:15,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2609 transitions. [2022-02-11 00:45:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:15,743 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:15,743 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:15,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:15,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:15,943 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:15,943 INFO L85 PathProgramCache]: Analyzing trace with hash 824275693, now seen corresponding path program 39 times [2022-02-11 00:45:15,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:15,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418358582] [2022-02-11 00:45:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:15,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:15,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:15,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418358582] [2022-02-11 00:45:15,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418358582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:15,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925796210] [2022-02-11 00:45:15,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:15,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:15,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:15,969 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:15,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 00:45:15,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:16,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:16,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925796210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:16,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:16,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 00:45:16,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621413053] [2022-02-11 00:45:16,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:16,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:45:16,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:45:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:45:16,090 INFO L87 Difference]: Start difference. First operand 754 states and 2609 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:16,324 INFO L93 Difference]: Finished difference Result 1178 states and 3692 transitions. [2022-02-11 00:45:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:45:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:16,327 INFO L225 Difference]: With dead ends: 1178 [2022-02-11 00:45:16,327 INFO L226 Difference]: Without dead ends: 1118 [2022-02-11 00:45:16,327 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:45:16,327 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:16,327 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 127 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-02-11 00:45:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 855. [2022-02-11 00:45:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.4531615925058547) internal successors, (2949), 854 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2949 transitions. [2022-02-11 00:45:16,340 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2949 transitions. Word has length 22 [2022-02-11 00:45:16,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:16,340 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 2949 transitions. [2022-02-11 00:45:16,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2949 transitions. [2022-02-11 00:45:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:16,342 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:16,342 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:16,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-11 00:45:16,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:16,542 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:16,543 INFO L85 PathProgramCache]: Analyzing trace with hash 673068563, now seen corresponding path program 40 times [2022-02-11 00:45:16,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:16,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949710197] [2022-02-11 00:45:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:16,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:16,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:16,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949710197] [2022-02-11 00:45:16,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949710197] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:16,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601342121] [2022-02-11 00:45:16,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:16,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:16,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:16,564 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:16,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 00:45:16,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:16,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:16,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:16,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:16,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601342121] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:16,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:16,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-11 00:45:16,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092516654] [2022-02-11 00:45:16,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:16,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:16,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:16,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:16,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:16,688 INFO L87 Difference]: Start difference. First operand 855 states and 2949 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:16,872 INFO L93 Difference]: Finished difference Result 1384 states and 4343 transitions. [2022-02-11 00:45:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:45:16,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:16,875 INFO L225 Difference]: With dead ends: 1384 [2022-02-11 00:45:16,875 INFO L226 Difference]: Without dead ends: 1342 [2022-02-11 00:45:16,875 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:45:16,875 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:16,875 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 131 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-02-11 00:45:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1001. [2022-02-11 00:45:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.436) internal successors, (3436), 1000 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3436 transitions. [2022-02-11 00:45:16,893 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3436 transitions. Word has length 22 [2022-02-11 00:45:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:16,893 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 3436 transitions. [2022-02-11 00:45:16,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3436 transitions. [2022-02-11 00:45:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:16,895 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:16,895 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:16,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:17,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-02-11 00:45:17,103 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:17,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1391327505, now seen corresponding path program 41 times [2022-02-11 00:45:17,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:17,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374526045] [2022-02-11 00:45:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:17,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:17,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:17,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374526045] [2022-02-11 00:45:17,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374526045] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:17,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687136836] [2022-02-11 00:45:17,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:17,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:17,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:17,124 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:17,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 00:45:17,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:45:17,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:17,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:17,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:17,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687136836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:17,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:17,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-11 00:45:17,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687181602] [2022-02-11 00:45:17,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:17,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:17,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:17,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:17,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:17,238 INFO L87 Difference]: Start difference. First operand 1001 states and 3436 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:17,436 INFO L93 Difference]: Finished difference Result 1359 states and 4366 transitions. [2022-02-11 00:45:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:45:17,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:17,438 INFO L225 Difference]: With dead ends: 1359 [2022-02-11 00:45:17,439 INFO L226 Difference]: Without dead ends: 1354 [2022-02-11 00:45:17,439 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:45:17,439 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:17,439 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 174 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:45:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-02-11 00:45:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 953. [2022-02-11 00:45:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.4044117647058822) internal successors, (3241), 952 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3241 transitions. [2022-02-11 00:45:17,453 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3241 transitions. Word has length 22 [2022-02-11 00:45:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:17,453 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3241 transitions. [2022-02-11 00:45:17,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3241 transitions. [2022-02-11 00:45:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:17,454 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:17,454 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:17,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-11 00:45:17,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-11 00:45:17,667 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash -28111141, now seen corresponding path program 42 times [2022-02-11 00:45:17,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:17,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955052738] [2022-02-11 00:45:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:17,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:17,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:17,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955052738] [2022-02-11 00:45:17,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955052738] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:17,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360024940] [2022-02-11 00:45:17,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:17,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:17,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:17,687 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:17,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 00:45:17,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:45:17,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:17,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:17,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360024940] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:17,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:17,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-11 00:45:17,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909725709] [2022-02-11 00:45:17,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:17,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:17,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:17,809 INFO L87 Difference]: Start difference. First operand 953 states and 3241 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:17,971 INFO L93 Difference]: Finished difference Result 1661 states and 5281 transitions. [2022-02-11 00:45:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:45:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:17,974 INFO L225 Difference]: With dead ends: 1661 [2022-02-11 00:45:17,974 INFO L226 Difference]: Without dead ends: 1661 [2022-02-11 00:45:17,974 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:45:17,974 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 128 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:17,974 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 120 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-02-11 00:45:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1070. [2022-02-11 00:45:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.4752104770813843) internal successors, (3715), 1069 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3715 transitions. [2022-02-11 00:45:17,991 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3715 transitions. Word has length 22 [2022-02-11 00:45:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:17,991 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 3715 transitions. [2022-02-11 00:45:17,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3715 transitions. [2022-02-11 00:45:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:17,992 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:17,993 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:18,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-11 00:45:18,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:18,206 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1520137261, now seen corresponding path program 43 times [2022-02-11 00:45:18,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:18,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147021212] [2022-02-11 00:45:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:18,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:18,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147021212] [2022-02-11 00:45:18,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147021212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:18,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769438566] [2022-02-11 00:45:18,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:18,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:18,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:18,228 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:18,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 00:45:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:18,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:18,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:18,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769438566] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:18,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:18,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-11 00:45:18,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33421578] [2022-02-11 00:45:18,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:18,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:18,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:18,348 INFO L87 Difference]: Start difference. First operand 1070 states and 3715 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:18,546 INFO L93 Difference]: Finished difference Result 1318 states and 4372 transitions. [2022-02-11 00:45:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:45:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:18,548 INFO L225 Difference]: With dead ends: 1318 [2022-02-11 00:45:18,548 INFO L226 Difference]: Without dead ends: 1294 [2022-02-11 00:45:18,548 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:45:18,548 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 124 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:18,548 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 136 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-02-11 00:45:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1112. [2022-02-11 00:45:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.532853285328533) internal successors, (3925), 1111 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3925 transitions. [2022-02-11 00:45:18,565 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3925 transitions. Word has length 22 [2022-02-11 00:45:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:18,565 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3925 transitions. [2022-02-11 00:45:18,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3925 transitions. [2022-02-11 00:45:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:18,567 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:18,567 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:18,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:18,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:18,782 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:18,782 INFO L85 PathProgramCache]: Analyzing trace with hash -360322321, now seen corresponding path program 44 times [2022-02-11 00:45:18,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:18,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43799013] [2022-02-11 00:45:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:18,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:18,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:18,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43799013] [2022-02-11 00:45:18,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43799013] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:18,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449411188] [2022-02-11 00:45:18,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:18,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:18,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:18,806 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:18,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 00:45:18,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:18,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:18,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:18,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:18,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:18,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449411188] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:18,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:18,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-11 00:45:18,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406356816] [2022-02-11 00:45:18,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:18,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:18,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:18,919 INFO L87 Difference]: Start difference. First operand 1112 states and 3925 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:19,105 INFO L93 Difference]: Finished difference Result 1655 states and 5369 transitions. [2022-02-11 00:45:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:45:19,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:19,109 INFO L225 Difference]: With dead ends: 1655 [2022-02-11 00:45:19,109 INFO L226 Difference]: Without dead ends: 1650 [2022-02-11 00:45:19,109 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:45:19,109 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 154 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:19,109 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 123 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-02-11 00:45:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1058. [2022-02-11 00:45:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.501419110690634) internal successors, (3701), 1057 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3701 transitions. [2022-02-11 00:45:19,155 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3701 transitions. Word has length 22 [2022-02-11 00:45:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:19,155 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3701 transitions. [2022-02-11 00:45:19,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3701 transitions. [2022-02-11 00:45:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:19,157 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:19,157 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:19,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-02-11 00:45:19,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:19,363 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:19,364 INFO L85 PathProgramCache]: Analyzing trace with hash -844478929, now seen corresponding path program 45 times [2022-02-11 00:45:19,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:19,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014944897] [2022-02-11 00:45:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:19,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:19,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:19,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014944897] [2022-02-11 00:45:19,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014944897] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:19,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429366905] [2022-02-11 00:45:19,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:19,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:19,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:19,388 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:19,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-11 00:45:19,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:19,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:19,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:19,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:19,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:19,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429366905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:19,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:19,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 00:45:19,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046175936] [2022-02-11 00:45:19,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:19,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:45:19,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:19,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:45:19,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:45:19,501 INFO L87 Difference]: Start difference. First operand 1058 states and 3701 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:19,690 INFO L93 Difference]: Finished difference Result 1629 states and 5300 transitions. [2022-02-11 00:45:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:45:19,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:19,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:19,693 INFO L225 Difference]: With dead ends: 1629 [2022-02-11 00:45:19,693 INFO L226 Difference]: Without dead ends: 1621 [2022-02-11 00:45:19,693 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:45:19,693 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 143 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:19,693 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 137 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-02-11 00:45:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1058. [2022-02-11 00:45:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.498580889309366) internal successors, (3698), 1057 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3698 transitions. [2022-02-11 00:45:19,717 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3698 transitions. Word has length 22 [2022-02-11 00:45:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:19,717 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3698 transitions. [2022-02-11 00:45:19,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3698 transitions. [2022-02-11 00:45:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:19,718 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:19,718 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:19,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:19,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:19,935 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1228711595, now seen corresponding path program 46 times [2022-02-11 00:45:19,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:19,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945248310] [2022-02-11 00:45:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:19,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:19,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:19,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945248310] [2022-02-11 00:45:19,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945248310] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:19,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331629633] [2022-02-11 00:45:19,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:19,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:19,957 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:19,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-11 00:45:19,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:19,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:19,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:19,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:20,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:20,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331629633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:20,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:20,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:20,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168241657] [2022-02-11 00:45:20,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:20,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:20,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:20,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:20,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:20,074 INFO L87 Difference]: Start difference. First operand 1058 states and 3698 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) [2022-02-11 00:45:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:20,230 INFO L93 Difference]: Finished difference Result 1982 states and 6436 transitions. [2022-02-11 00:45:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:45:20,230 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 22 [2022-02-11 00:45:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:20,233 INFO L225 Difference]: With dead ends: 1982 [2022-02-11 00:45:20,234 INFO L226 Difference]: Without dead ends: 1982 [2022-02-11 00:45:20,234 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:45:20,234 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 167 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:20,234 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 100 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2022-02-11 00:45:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1118. [2022-02-11 00:45:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.5380483437779766) internal successors, (3952), 1117 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3952 transitions. [2022-02-11 00:45:20,253 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3952 transitions. Word has length 22 [2022-02-11 00:45:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:20,253 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3952 transitions. [2022-02-11 00:45:20,253 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) [2022-02-11 00:45:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3952 transitions. [2022-02-11 00:45:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:20,254 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:20,255 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:20,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:20,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:20,455 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1936642699, now seen corresponding path program 47 times [2022-02-11 00:45:20,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:20,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146741326] [2022-02-11 00:45:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:20,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:20,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:20,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146741326] [2022-02-11 00:45:20,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146741326] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:20,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884936907] [2022-02-11 00:45:20,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:20,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:20,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:20,488 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:20,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-11 00:45:20,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:20,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:20,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:20,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:20,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884936907] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:20,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:20,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:20,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458710915] [2022-02-11 00:45:20,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:20,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:20,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:20,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:20,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:20,601 INFO L87 Difference]: Start difference. First operand 1118 states and 3952 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:20,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:20,829 INFO L93 Difference]: Finished difference Result 1528 states and 5019 transitions. [2022-02-11 00:45:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:45:20,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:20,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:20,833 INFO L225 Difference]: With dead ends: 1528 [2022-02-11 00:45:20,833 INFO L226 Difference]: Without dead ends: 1504 [2022-02-11 00:45:20,833 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:45:20,833 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:20,833 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 162 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:45:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-02-11 00:45:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1118. [2022-02-11 00:45:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.5290957923008057) internal successors, (3942), 1117 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3942 transitions. [2022-02-11 00:45:20,852 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3942 transitions. Word has length 22 [2022-02-11 00:45:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:20,852 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3942 transitions. [2022-02-11 00:45:20,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3942 transitions. [2022-02-11 00:45:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:20,854 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:20,854 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:20,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:21,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-02-11 00:45:21,067 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1339423245, now seen corresponding path program 48 times [2022-02-11 00:45:21,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:21,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178889257] [2022-02-11 00:45:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:21,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:21,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178889257] [2022-02-11 00:45:21,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178889257] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:21,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923236596] [2022-02-11 00:45:21,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:21,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:21,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:21,089 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:21,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-11 00:45:21,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:21,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:21,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:21,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:21,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923236596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:21,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:21,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:21,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101823745] [2022-02-11 00:45:21,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:21,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:21,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:21,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:21,192 INFO L87 Difference]: Start difference. First operand 1118 states and 3942 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:21,360 INFO L93 Difference]: Finished difference Result 1348 states and 4465 transitions. [2022-02-11 00:45:21,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:45:21,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:21,362 INFO L225 Difference]: With dead ends: 1348 [2022-02-11 00:45:21,362 INFO L226 Difference]: Without dead ends: 1348 [2022-02-11 00:45:21,362 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:45:21,362 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:21,363 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 114 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-02-11 00:45:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1081. [2022-02-11 00:45:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.4935185185185187) internal successors, (3773), 1080 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3773 transitions. [2022-02-11 00:45:21,378 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3773 transitions. Word has length 22 [2022-02-11 00:45:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:21,378 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 3773 transitions. [2022-02-11 00:45:21,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3773 transitions. [2022-02-11 00:45:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:21,380 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:21,380 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:21,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:21,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:21,597 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash -724972823, now seen corresponding path program 49 times [2022-02-11 00:45:21,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:21,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439007588] [2022-02-11 00:45:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:21,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:21,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:21,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439007588] [2022-02-11 00:45:21,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439007588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:21,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646482112] [2022-02-11 00:45:21,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:21,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:21,623 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:21,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-11 00:45:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:21,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:21,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:21,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646482112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:21,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:21,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:21,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037511715] [2022-02-11 00:45:21,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:21,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:21,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:21,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:21,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:21,738 INFO L87 Difference]: Start difference. First operand 1081 states and 3773 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:21,957 INFO L93 Difference]: Finished difference Result 1884 states and 6113 transitions. [2022-02-11 00:45:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:45:21,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:21,961 INFO L225 Difference]: With dead ends: 1884 [2022-02-11 00:45:21,961 INFO L226 Difference]: Without dead ends: 1879 [2022-02-11 00:45:21,961 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:21,961 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:21,961 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 132 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:45:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-02-11 00:45:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1045. [2022-02-11 00:45:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4655172413793105) internal successors, (3618), 1044 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3618 transitions. [2022-02-11 00:45:21,980 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3618 transitions. Word has length 22 [2022-02-11 00:45:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:21,980 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3618 transitions. [2022-02-11 00:45:21,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3618 transitions. [2022-02-11 00:45:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:21,982 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:21,982 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:21,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:22,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:22,197 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:22,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1044869595, now seen corresponding path program 50 times [2022-02-11 00:45:22,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:22,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899560207] [2022-02-11 00:45:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:22,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:22,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:22,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899560207] [2022-02-11 00:45:22,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899560207] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:22,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917906] [2022-02-11 00:45:22,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:22,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:22,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:22,224 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:22,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-11 00:45:22,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:22,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:22,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:22,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:22,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:22,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917906] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:22,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:22,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:45:22,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386999009] [2022-02-11 00:45:22,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:22,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:45:22,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:22,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:45:22,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:45:22,333 INFO L87 Difference]: Start difference. First operand 1045 states and 3618 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:22,505 INFO L93 Difference]: Finished difference Result 1515 states and 4939 transitions. [2022-02-11 00:45:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:45:22,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:22,508 INFO L225 Difference]: With dead ends: 1515 [2022-02-11 00:45:22,508 INFO L226 Difference]: Without dead ends: 1507 [2022-02-11 00:45:22,508 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:45:22,508 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 129 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:22,508 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 120 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-02-11 00:45:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1045. [2022-02-11 00:45:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4626436781609193) internal successors, (3615), 1044 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3615 transitions. [2022-02-11 00:45:22,522 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3615 transitions. Word has length 22 [2022-02-11 00:45:22,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:22,522 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3615 transitions. [2022-02-11 00:45:22,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3615 transitions. [2022-02-11 00:45:22,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:22,524 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:22,524 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:22,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-11 00:45:22,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:22,725 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:22,725 INFO L85 PathProgramCache]: Analyzing trace with hash 562039857, now seen corresponding path program 51 times [2022-02-11 00:45:22,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:22,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576289595] [2022-02-11 00:45:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:22,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:22,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:22,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576289595] [2022-02-11 00:45:22,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576289595] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:22,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436739139] [2022-02-11 00:45:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:22,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:22,747 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:22,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-11 00:45:22,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:45:22,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:22,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:22,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436739139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:22,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:22,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-11 00:45:22,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482079967] [2022-02-11 00:45:22,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:22,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:45:22,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:45:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:45:22,861 INFO L87 Difference]: Start difference. First operand 1045 states and 3615 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:22,984 INFO L93 Difference]: Finished difference Result 1319 states and 4427 transitions. [2022-02-11 00:45:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:45:22,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:22,987 INFO L225 Difference]: With dead ends: 1319 [2022-02-11 00:45:22,987 INFO L226 Difference]: Without dead ends: 1319 [2022-02-11 00:45:22,987 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:45:22,987 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:22,987 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 99 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-02-11 00:45:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1053. [2022-02-11 00:45:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.467680608365019) internal successors, (3648), 1052 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3648 transitions. [2022-02-11 00:45:23,001 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3648 transitions. Word has length 22 [2022-02-11 00:45:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:23,001 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3648 transitions. [2022-02-11 00:45:23,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3648 transitions. [2022-02-11 00:45:23,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:45:23,003 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:23,003 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:23,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-02-11 00:45:23,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:23,203 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:23,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:23,203 INFO L85 PathProgramCache]: Analyzing trace with hash 280304051, now seen corresponding path program 52 times [2022-02-11 00:45:23,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:23,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317047123] [2022-02-11 00:45:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:23,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:23,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:23,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317047123] [2022-02-11 00:45:23,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317047123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:23,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837377715] [2022-02-11 00:45:23,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:23,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:23,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:23,227 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:23,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-11 00:45:23,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:23,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:23,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:45:23,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:23,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:23,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837377715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:23,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:23,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-11 00:45:23,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593187617] [2022-02-11 00:45:23,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:23,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:45:23,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:45:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:45:23,321 INFO L87 Difference]: Start difference. First operand 1053 states and 3648 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:23,411 INFO L93 Difference]: Finished difference Result 1256 states and 4266 transitions. [2022-02-11 00:45:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:45:23,411 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:45:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:23,413 INFO L225 Difference]: With dead ends: 1256 [2022-02-11 00:45:23,413 INFO L226 Difference]: Without dead ends: 1247 [2022-02-11 00:45:23,413 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:45:23,414 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:23,414 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 56 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:45:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-02-11 00:45:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1053. [2022-02-11 00:45:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.466730038022814) internal successors, (3647), 1052 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3647 transitions. [2022-02-11 00:45:23,426 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3647 transitions. Word has length 22 [2022-02-11 00:45:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:23,426 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3647 transitions. [2022-02-11 00:45:23,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3647 transitions. [2022-02-11 00:45:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:23,428 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:23,428 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:23,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-11 00:45:23,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:23,639 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1982381327, now seen corresponding path program 53 times [2022-02-11 00:45:23,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:23,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552269665] [2022-02-11 00:45:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:23,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:23,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552269665] [2022-02-11 00:45:23,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552269665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:23,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045197120] [2022-02-11 00:45:23,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:23,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:23,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:23,849 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:23,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-11 00:45:23,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:23,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:24,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:24,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:24,132 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 37 treesize of output 21 [2022-02-11 00:45:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:24,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:24,418 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:45:24,418 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 20 treesize of output 43 [2022-02-11 00:45:24,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:24,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:24,474 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 20 treesize of output 3 [2022-02-11 00:45:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:24,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045197120] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:24,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:24,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:45:24,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470011864] [2022-02-11 00:45:24,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:24,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:24,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:24,489 INFO L87 Difference]: Start difference. First operand 1053 states and 3647 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:26,394 INFO L93 Difference]: Finished difference Result 2238 states and 7334 transitions. [2022-02-11 00:45:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:45:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:45:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:26,398 INFO L225 Difference]: With dead ends: 2238 [2022-02-11 00:45:26,398 INFO L226 Difference]: Without dead ends: 2218 [2022-02-11 00:45:26,398 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=3345, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:45:26,398 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 340 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 2725 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 828 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:26,399 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 295 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2725 Invalid, 0 Unknown, 828 Unchecked, 1.0s Time] [2022-02-11 00:45:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-02-11 00:45:26,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1144. [2022-02-11 00:45:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.41907261592301) internal successors, (3908), 1143 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3908 transitions. [2022-02-11 00:45:26,418 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3908 transitions. Word has length 24 [2022-02-11 00:45:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:26,418 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 3908 transitions. [2022-02-11 00:45:26,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3908 transitions. [2022-02-11 00:45:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:26,420 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:26,420 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:26,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-11 00:45:26,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-11 00:45:26,621 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:26,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1203543731, now seen corresponding path program 54 times [2022-02-11 00:45:26,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:26,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209547681] [2022-02-11 00:45:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:26,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:26,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:26,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209547681] [2022-02-11 00:45:26,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209547681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:26,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548513391] [2022-02-11 00:45:26,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:26,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:26,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:26,814 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:26,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-11 00:45:26,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:26,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:26,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:45:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:27,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:27,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:27,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:27,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:27,387 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 31 treesize of output 43 [2022-02-11 00:45:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:27,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:28,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:28,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:28,131 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 41 treesize of output 7 [2022-02-11 00:45:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:28,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548513391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:28,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:28,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:45:28,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806641857] [2022-02-11 00:45:28,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:28,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:45:28,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:45:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:45:28,160 INFO L87 Difference]: Start difference. First operand 1144 states and 3908 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:45:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:29,661 INFO L93 Difference]: Finished difference Result 2453 states and 8302 transitions. [2022-02-11 00:45:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:45:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-02-11 00:45:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:29,665 INFO L225 Difference]: With dead ends: 2453 [2022-02-11 00:45:29,665 INFO L226 Difference]: Without dead ends: 2451 [2022-02-11 00:45:29,666 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=405, Invalid=3501, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:45:29,666 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 209 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1761 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:29,666 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 227 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 936 Invalid, 0 Unknown, 1761 Unchecked, 0.4s Time] [2022-02-11 00:45:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-02-11 00:45:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1173. [2022-02-11 00:45:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.409556313993174) internal successors, (3996), 1172 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3996 transitions. [2022-02-11 00:45:29,687 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3996 transitions. Word has length 24 [2022-02-11 00:45:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:29,687 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 3996 transitions. [2022-02-11 00:45:29,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:45:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3996 transitions. [2022-02-11 00:45:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:29,688 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:29,688 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:29,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:29,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-11 00:45:29,889 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:29,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1332626450, now seen corresponding path program 4 times [2022-02-11 00:45:29,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:29,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371495208] [2022-02-11 00:45:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:29,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:30,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:30,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371495208] [2022-02-11 00:45:30,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371495208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:30,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889056876] [2022-02-11 00:45:30,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:30,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:30,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:30,094 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:30,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-11 00:45:30,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:30,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:30,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:30,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:30,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:30,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:30,377 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 37 treesize of output 21 [2022-02-11 00:45:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:30,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:30,649 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:45:30,649 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 20 treesize of output 43 [2022-02-11 00:45:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:30,698 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 20 treesize of output 3 [2022-02-11 00:45:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:30,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889056876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:30,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:30,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:45:30,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558916928] [2022-02-11 00:45:30,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:30,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:30,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:30,713 INFO L87 Difference]: Start difference. First operand 1173 states and 3996 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:32,289 INFO L93 Difference]: Finished difference Result 2258 states and 7228 transitions. [2022-02-11 00:45:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:45:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:45:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:32,293 INFO L225 Difference]: With dead ends: 2258 [2022-02-11 00:45:32,293 INFO L226 Difference]: Without dead ends: 2248 [2022-02-11 00:45:32,294 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=2312, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:45:32,294 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 332 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 3537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1044 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:32,294 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 208 Invalid, 3537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2451 Invalid, 0 Unknown, 1044 Unchecked, 0.9s Time] [2022-02-11 00:45:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2022-02-11 00:45:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1125. [2022-02-11 00:45:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.4412811387900355) internal successors, (3868), 1124 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) [2022-02-11 00:45:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3868 transitions. [2022-02-11 00:45:32,313 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3868 transitions. Word has length 24 [2022-02-11 00:45:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:32,313 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3868 transitions. [2022-02-11 00:45:32,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3868 transitions. [2022-02-11 00:45:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:32,315 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:32,315 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:32,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-11 00:45:32,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-02-11 00:45:32,515 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:32,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1328662509, now seen corresponding path program 55 times [2022-02-11 00:45:32,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:32,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974781821] [2022-02-11 00:45:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:32,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:32,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:32,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974781821] [2022-02-11 00:45:32,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974781821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:32,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980019026] [2022-02-11 00:45:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:32,710 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:32,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-11 00:45:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:32,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:32,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:32,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:32,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:32,972 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 37 treesize of output 21 [2022-02-11 00:45:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:33,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:33,248 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:45:33,248 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 20 treesize of output 43 [2022-02-11 00:45:33,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:33,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:33,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:33,294 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 20 treesize of output 3 [2022-02-11 00:45:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:33,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980019026] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:33,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:33,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:45:33,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28450576] [2022-02-11 00:45:33,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:33,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:33,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:33,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:33,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:33,309 INFO L87 Difference]: Start difference. First operand 1125 states and 3868 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:34,962 INFO L93 Difference]: Finished difference Result 2108 states and 6761 transitions. [2022-02-11 00:45:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:45:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:45:34,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:34,966 INFO L225 Difference]: With dead ends: 2108 [2022-02-11 00:45:34,966 INFO L226 Difference]: Without dead ends: 2101 [2022-02-11 00:45:34,967 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=2588, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:45:34,967 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 224 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:34,967 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 201 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2104 Invalid, 0 Unknown, 475 Unchecked, 0.8s Time] [2022-02-11 00:45:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2022-02-11 00:45:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1165. [2022-02-11 00:45:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.4140893470790377) internal successors, (3974), 1164 states have internal predecessors, (3974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3974 transitions. [2022-02-11 00:45:34,985 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3974 transitions. Word has length 24 [2022-02-11 00:45:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:34,985 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3974 transitions. [2022-02-11 00:45:34,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3974 transitions. [2022-02-11 00:45:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:34,987 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:34,987 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:35,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-11 00:45:35,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-11 00:45:35,187 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:35,188 INFO L85 PathProgramCache]: Analyzing trace with hash -825385579, now seen corresponding path program 56 times [2022-02-11 00:45:35,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:35,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124711850] [2022-02-11 00:45:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:35,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:35,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:35,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124711850] [2022-02-11 00:45:35,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124711850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:35,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827801459] [2022-02-11 00:45:35,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:35,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:35,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:35,380 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:35,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-11 00:45:35,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:35,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:45:35,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:35,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:35,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:35,894 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 29 treesize of output 17 [2022-02-11 00:45:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:35,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:36,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:36,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:36,276 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 37 treesize of output 56 [2022-02-11 00:45:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:36,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827801459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:36,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:36,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-02-11 00:45:36,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527594780] [2022-02-11 00:45:36,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:36,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:45:36,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:36,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:45:36,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:45:36,439 INFO L87 Difference]: Start difference. First operand 1165 states and 3974 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:38,395 INFO L93 Difference]: Finished difference Result 2244 states and 7154 transitions. [2022-02-11 00:45:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 00:45:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:38,399 INFO L225 Difference]: With dead ends: 2244 [2022-02-11 00:45:38,399 INFO L226 Difference]: Without dead ends: 2227 [2022-02-11 00:45:38,399 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=558, Invalid=4992, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:45:38,399 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 233 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:38,400 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 344 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1670 Invalid, 0 Unknown, 545 Unchecked, 0.6s Time] [2022-02-11 00:45:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2022-02-11 00:45:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1216. [2022-02-11 00:45:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.3810699588477364) internal successors, (4108), 1215 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4108 transitions. [2022-02-11 00:45:38,419 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4108 transitions. Word has length 24 [2022-02-11 00:45:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:38,419 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 4108 transitions. [2022-02-11 00:45:38,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4108 transitions. [2022-02-11 00:45:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:38,420 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:38,420 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:38,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-11 00:45:38,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:38,621 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash -696302860, now seen corresponding path program 5 times [2022-02-11 00:45:38,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:38,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750555811] [2022-02-11 00:45:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:38,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:38,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750555811] [2022-02-11 00:45:38,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750555811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:38,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442121783] [2022-02-11 00:45:38,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:38,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:38,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:38,809 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:38,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-11 00:45:38,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:38,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:38,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:38,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:39,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:39,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:39,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:39,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:39,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:45:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:39,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:39,345 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:45:39,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:45:39,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:39,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:39,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:45:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:39,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442121783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:39,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:39,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:45:39,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025243955] [2022-02-11 00:45:39,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:39,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:39,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:39,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:39,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:39,427 INFO L87 Difference]: Start difference. First operand 1216 states and 4108 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:41,057 INFO L93 Difference]: Finished difference Result 2489 states and 8068 transitions. [2022-02-11 00:45:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:45:41,058 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:45:41,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:41,062 INFO L225 Difference]: With dead ends: 2489 [2022-02-11 00:45:41,062 INFO L226 Difference]: Without dead ends: 2482 [2022-02-11 00:45:41,062 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=279, Invalid=2583, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:45:41,063 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 233 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 719 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:41,063 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 233 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2050 Invalid, 0 Unknown, 719 Unchecked, 0.8s Time] [2022-02-11 00:45:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2022-02-11 00:45:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1182. [2022-02-11 00:45:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.4106689246401354) internal successors, (4028), 1181 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 4028 transitions. [2022-02-11 00:45:41,084 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 4028 transitions. Word has length 24 [2022-02-11 00:45:41,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:41,084 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 4028 transitions. [2022-02-11 00:45:41,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 4028 transitions. [2022-02-11 00:45:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:41,085 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:41,085 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:41,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-02-11 00:45:41,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:41,286 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:41,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1876273715, now seen corresponding path program 57 times [2022-02-11 00:45:41,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:41,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732519029] [2022-02-11 00:45:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:41,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:41,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:41,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732519029] [2022-02-11 00:45:41,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732519029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:41,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526123294] [2022-02-11 00:45:41,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:41,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:41,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:41,478 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:41,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-11 00:45:41,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:41,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:41,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:45:41,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:42,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:42,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:42,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:42,019 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 29 treesize of output 17 [2022-02-11 00:45:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:42,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:42,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:42,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:42,408 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 37 treesize of output 56 [2022-02-11 00:45:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:42,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526123294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:42,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:42,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-02-11 00:45:42,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232099615] [2022-02-11 00:45:42,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:42,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:45:42,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:42,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:45:42,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:45:42,485 INFO L87 Difference]: Start difference. First operand 1182 states and 4028 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:43,738 INFO L93 Difference]: Finished difference Result 2242 states and 7149 transitions. [2022-02-11 00:45:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:45:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:43,742 INFO L225 Difference]: With dead ends: 2242 [2022-02-11 00:45:43,742 INFO L226 Difference]: Without dead ends: 2232 [2022-02-11 00:45:43,742 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=2985, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:45:43,742 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 624 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:43,743 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 319 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1287 Invalid, 0 Unknown, 624 Unchecked, 0.5s Time] [2022-02-11 00:45:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-02-11 00:45:43,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1224. [2022-02-11 00:45:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.3810302534750614) internal successors, (4135), 1223 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4135 transitions. [2022-02-11 00:45:43,762 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4135 transitions. Word has length 24 [2022-02-11 00:45:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:43,763 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 4135 transitions. [2022-02-11 00:45:43,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4135 transitions. [2022-02-11 00:45:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:43,764 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:43,764 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:43,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-11 00:45:43,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-02-11 00:45:43,965 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:43,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1043483089, now seen corresponding path program 58 times [2022-02-11 00:45:43,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:43,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240571903] [2022-02-11 00:45:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:43,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:44,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:44,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240571903] [2022-02-11 00:45:44,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240571903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:44,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639519697] [2022-02-11 00:45:44,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:44,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:44,160 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:44,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-11 00:45:44,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:44,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:44,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:44,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:44,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:44,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:44,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:44,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:44,438 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 37 treesize of output 21 [2022-02-11 00:45:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:44,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:44,708 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:45:44,709 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 20 treesize of output 43 [2022-02-11 00:45:44,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:44,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:44,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:44,748 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 20 treesize of output 3 [2022-02-11 00:45:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:44,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639519697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:44,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:44,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:45:44,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082610257] [2022-02-11 00:45:44,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:44,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:44,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:44,764 INFO L87 Difference]: Start difference. First operand 1224 states and 4135 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:46,792 INFO L93 Difference]: Finished difference Result 2323 states and 7425 transitions. [2022-02-11 00:45:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 00:45:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:45:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:46,796 INFO L225 Difference]: With dead ends: 2323 [2022-02-11 00:45:46,797 INFO L226 Difference]: Without dead ends: 2312 [2022-02-11 00:45:46,797 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=4055, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:45:46,797 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 278 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 3636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:46,797 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 364 Invalid, 3636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2533 Invalid, 0 Unknown, 1064 Unchecked, 1.0s Time] [2022-02-11 00:45:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-02-11 00:45:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1189. [2022-02-11 00:45:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.4116161616161618) internal successors, (4053), 1188 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 4053 transitions. [2022-02-11 00:45:46,818 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 4053 transitions. Word has length 24 [2022-02-11 00:45:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:46,818 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 4053 transitions. [2022-02-11 00:45:46,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 4053 transitions. [2022-02-11 00:45:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:46,820 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:46,820 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:46,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-02-11 00:45:47,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-02-11 00:45:47,020 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash 79322356, now seen corresponding path program 6 times [2022-02-11 00:45:47,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:47,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705251987] [2022-02-11 00:45:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:47,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:47,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:47,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705251987] [2022-02-11 00:45:47,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705251987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:47,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111245506] [2022-02-11 00:45:47,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:47,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:47,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:47,240 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:47,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-11 00:45:47,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:47,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:45:47,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:47,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:47,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:47,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:47,676 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 22 treesize of output 14 [2022-02-11 00:45:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:47,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:47,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:48,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:48,010 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 17 treesize of output 42 [2022-02-11 00:45:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:48,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111245506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:48,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:48,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 34 [2022-02-11 00:45:48,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875918017] [2022-02-11 00:45:48,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:48,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:45:48,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:45:48,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:45:48,130 INFO L87 Difference]: Start difference. First operand 1189 states and 4053 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 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) [2022-02-11 00:45:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:49,584 INFO L93 Difference]: Finished difference Result 2483 states and 8473 transitions. [2022-02-11 00:45:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:45:49,584 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 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 24 [2022-02-11 00:45:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:49,588 INFO L225 Difference]: With dead ends: 2483 [2022-02-11 00:45:49,588 INFO L226 Difference]: Without dead ends: 2473 [2022-02-11 00:45:49,589 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=439, Invalid=3851, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:45:49,589 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 271 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 751 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:49,589 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 216 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1709 Invalid, 0 Unknown, 751 Unchecked, 0.7s Time] [2022-02-11 00:45:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-02-11 00:45:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1210. [2022-02-11 00:45:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.3928866832092637) internal successors, (4102), 1209 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4102 transitions. [2022-02-11 00:45:49,609 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4102 transitions. Word has length 24 [2022-02-11 00:45:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:49,609 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 4102 transitions. [2022-02-11 00:45:49,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 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) [2022-02-11 00:45:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4102 transitions. [2022-02-11 00:45:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:49,611 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:49,611 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:49,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-11 00:45:49,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-11 00:45:49,812 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1185123218, now seen corresponding path program 7 times [2022-02-11 00:45:49,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:49,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366721439] [2022-02-11 00:45:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:49,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:50,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:50,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366721439] [2022-02-11 00:45:50,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366721439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:50,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568835661] [2022-02-11 00:45:50,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:50,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:50,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:50,019 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:50,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-11 00:45:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:50,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:50,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:50,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:50,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:45:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:50,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:50,610 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:45:50,610 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 20 treesize of output 43 [2022-02-11 00:45:50,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:50,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:50,673 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 20 treesize of output 3 [2022-02-11 00:45:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:50,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568835661] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:50,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:50,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:45:50,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542474555] [2022-02-11 00:45:50,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:50,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:50,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:50,688 INFO L87 Difference]: Start difference. First operand 1210 states and 4102 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:52,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:52,664 INFO L93 Difference]: Finished difference Result 2218 states and 7165 transitions. [2022-02-11 00:45:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:45:52,664 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:45:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:52,668 INFO L225 Difference]: With dead ends: 2218 [2022-02-11 00:45:52,668 INFO L226 Difference]: Without dead ends: 2213 [2022-02-11 00:45:52,669 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=2990, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:45:52,669 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 2227 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 4059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1378 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:52,669 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 298 Invalid, 4059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2650 Invalid, 0 Unknown, 1378 Unchecked, 1.0s Time] [2022-02-11 00:45:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2022-02-11 00:45:52,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1167. [2022-02-11 00:45:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 3.4219554030874786) internal successors, (3990), 1166 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3990 transitions. [2022-02-11 00:45:52,689 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3990 transitions. Word has length 24 [2022-02-11 00:45:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:52,690 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 3990 transitions. [2022-02-11 00:45:52,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3990 transitions. [2022-02-11 00:45:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:52,691 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:52,691 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:52,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-02-11 00:45:52,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:52,895 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:52,895 INFO L85 PathProgramCache]: Analyzing trace with hash 608816537, now seen corresponding path program 59 times [2022-02-11 00:45:52,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:52,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709487647] [2022-02-11 00:45:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:52,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:53,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:53,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709487647] [2022-02-11 00:45:53,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709487647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:53,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357503717] [2022-02-11 00:45:53,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:53,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:53,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:53,120 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:53,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-11 00:45:53,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:53,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:53,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:53,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:53,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:53,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:53,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:53,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:53,410 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 33 treesize of output 17 [2022-02-11 00:45:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:53,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:53,696 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:45:53,697 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 20 treesize of output 43 [2022-02-11 00:45:53,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:53,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:53,752 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 20 treesize of output 3 [2022-02-11 00:45:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:53,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357503717] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:53,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:53,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:45:53,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572916679] [2022-02-11 00:45:53,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:53,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:53,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:53,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:53,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:53,770 INFO L87 Difference]: Start difference. First operand 1167 states and 3990 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:55,108 INFO L93 Difference]: Finished difference Result 1768 states and 5895 transitions. [2022-02-11 00:45:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:45:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:45:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:55,111 INFO L225 Difference]: With dead ends: 1768 [2022-02-11 00:45:55,111 INFO L226 Difference]: Without dead ends: 1761 [2022-02-11 00:45:55,111 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:45:55,111 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 181 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:55,111 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 144 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1658 Invalid, 0 Unknown, 373 Unchecked, 0.6s Time] [2022-02-11 00:45:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-02-11 00:45:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1187. [2022-02-11 00:45:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 3.4106239460370995) internal successors, (4045), 1186 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 4045 transitions. [2022-02-11 00:45:55,128 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 4045 transitions. Word has length 24 [2022-02-11 00:45:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:55,128 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 4045 transitions. [2022-02-11 00:45:55,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:45:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 4045 transitions. [2022-02-11 00:45:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:55,129 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:55,129 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:55,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:55,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:55,343 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -655629037, now seen corresponding path program 60 times [2022-02-11 00:45:55,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:55,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255572855] [2022-02-11 00:45:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:55,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:55,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255572855] [2022-02-11 00:45:55,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255572855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:55,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718826239] [2022-02-11 00:45:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:55,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:55,536 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:55,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-11 00:45:55,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:55,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:45:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:56,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:56,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:56,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:56,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-02-11 00:45:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:56,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:56,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:56,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:56,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-02-11 00:45:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:56,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718826239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:56,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:56,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:45:56,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246784404] [2022-02-11 00:45:56,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:56,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:45:56,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:45:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:45:56,792 INFO L87 Difference]: Start difference. First operand 1187 states and 4045 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:45:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:58,682 INFO L93 Difference]: Finished difference Result 2469 states and 8328 transitions. [2022-02-11 00:45:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:45:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-02-11 00:45:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:58,687 INFO L225 Difference]: With dead ends: 2469 [2022-02-11 00:45:58,687 INFO L226 Difference]: Without dead ends: 2467 [2022-02-11 00:45:58,687 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=444, Invalid=4812, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 00:45:58,687 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 279 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 4045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:58,687 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 231 Invalid, 4045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 842 Invalid, 0 Unknown, 3165 Unchecked, 0.3s Time] [2022-02-11 00:45:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-02-11 00:45:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 1214. [2022-02-11 00:45:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.3940643033800493) internal successors, (4117), 1213 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4117 transitions. [2022-02-11 00:45:58,707 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4117 transitions. Word has length 24 [2022-02-11 00:45:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:58,707 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 4117 transitions. [2022-02-11 00:45:58,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:45:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4117 transitions. [2022-02-11 00:45:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:58,709 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:58,709 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:58,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:58,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:58,909 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:45:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash 577333074, now seen corresponding path program 8 times [2022-02-11 00:45:58,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:58,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49709478] [2022-02-11 00:45:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:59,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:59,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49709478] [2022-02-11 00:45:59,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49709478] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:59,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301638447] [2022-02-11 00:45:59,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:59,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:59,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:59,110 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:59,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-11 00:45:59,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:59,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:59,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:59,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:59,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:59,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:59,414 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 35 treesize of output 47 [2022-02-11 00:45:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:59,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:59,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:59,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:59,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:00,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:00,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-02-11 00:46:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:00,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301638447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:00,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:00,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-02-11 00:46:00,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519081241] [2022-02-11 00:46:00,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:00,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:00,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:00,094 INFO L87 Difference]: Start difference. First operand 1214 states and 4117 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:46:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:04,865 INFO L93 Difference]: Finished difference Result 3512 states and 12210 transitions. [2022-02-11 00:46:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-11 00:46:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:46:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:04,872 INFO L225 Difference]: With dead ends: 3512 [2022-02-11 00:46:04,873 INFO L226 Difference]: Without dead ends: 3500 [2022-02-11 00:46:04,873 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1081, Invalid=8425, Unknown=0, NotChecked=0, Total=9506 [2022-02-11 00:46:04,874 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 359 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 3729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2185 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:04,874 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 247 Invalid, 3729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1491 Invalid, 0 Unknown, 2185 Unchecked, 0.6s Time] [2022-02-11 00:46:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2022-02-11 00:46:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1290. [2022-02-11 00:46:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 3.3622963537626065) internal successors, (4334), 1289 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 4334 transitions. [2022-02-11 00:46:04,916 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 4334 transitions. Word has length 24 [2022-02-11 00:46:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:04,916 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 4334 transitions. [2022-02-11 00:46:04,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:46:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 4334 transitions. [2022-02-11 00:46:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:04,918 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:04,918 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:04,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-11 00:46:05,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:05,124 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:05,125 INFO L85 PathProgramCache]: Analyzing trace with hash 532275187, now seen corresponding path program 61 times [2022-02-11 00:46:05,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:05,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300846919] [2022-02-11 00:46:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:05,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:05,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:05,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300846919] [2022-02-11 00:46:05,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300846919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:05,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891582730] [2022-02-11 00:46:05,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:46:05,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:05,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:05,324 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:05,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-11 00:46:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:05,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:05,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:05,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:05,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:05,599 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 33 treesize of output 17 [2022-02-11 00:46:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:05,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:05,852 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:46:05,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:46:05,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:05,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:05,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:05,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:05,902 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 20 treesize of output 3 [2022-02-11 00:46:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:05,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891582730] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:05,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:05,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:46:05,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903815729] [2022-02-11 00:46:05,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:05,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:46:05,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:46:05,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:46:05,918 INFO L87 Difference]: Start difference. First operand 1290 states and 4334 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:07,102 INFO L93 Difference]: Finished difference Result 2314 states and 7727 transitions. [2022-02-11 00:46:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:46:07,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:07,106 INFO L225 Difference]: With dead ends: 2314 [2022-02-11 00:46:07,107 INFO L226 Difference]: Without dead ends: 2307 [2022-02-11 00:46:07,107 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=2073, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:46:07,107 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:07,107 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 156 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1531 Invalid, 0 Unknown, 483 Unchecked, 0.6s Time] [2022-02-11 00:46:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2022-02-11 00:46:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1339. [2022-02-11 00:46:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.3520179372197307) internal successors, (4485), 1338 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4485 transitions. [2022-02-11 00:46:07,129 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4485 transitions. Word has length 24 [2022-02-11 00:46:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:07,129 INFO L470 AbstractCegarLoop]: Abstraction has 1339 states and 4485 transitions. [2022-02-11 00:46:07,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4485 transitions. [2022-02-11 00:46:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:07,131 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:07,131 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:07,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-02-11 00:46:07,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-11 00:46:07,346 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:07,347 INFO L85 PathProgramCache]: Analyzing trace with hash 335761682, now seen corresponding path program 9 times [2022-02-11 00:46:07,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:07,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685981980] [2022-02-11 00:46:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:07,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:07,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:07,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685981980] [2022-02-11 00:46:07,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685981980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:07,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202924607] [2022-02-11 00:46:07,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:46:07,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:07,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:07,543 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:07,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-11 00:46:07,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:46:07,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:07,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:46:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:07,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:07,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:07,987 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 33 treesize of output 21 [2022-02-11 00:46:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:08,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:08,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:08,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:08,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-02-11 00:46:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:08,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202924607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:08,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:08,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:46:08,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309796030] [2022-02-11 00:46:08,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:08,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:08,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:08,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:08,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:08,496 INFO L87 Difference]: Start difference. First operand 1339 states and 4485 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:46:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:10,943 INFO L93 Difference]: Finished difference Result 2562 states and 8265 transitions. [2022-02-11 00:46:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 00:46:10,945 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:46:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:10,949 INFO L225 Difference]: With dead ends: 2562 [2022-02-11 00:46:10,949 INFO L226 Difference]: Without dead ends: 2543 [2022-02-11 00:46:10,950 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=581, Invalid=4969, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:46:10,950 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 389 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1065 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:10,950 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 308 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2076 Invalid, 0 Unknown, 1065 Unchecked, 0.9s Time] [2022-02-11 00:46:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-02-11 00:46:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1371. [2022-02-11 00:46:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.3445255474452553) internal successors, (4582), 1370 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4582 transitions. [2022-02-11 00:46:10,973 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4582 transitions. Word has length 24 [2022-02-11 00:46:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:10,973 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 4582 transitions. [2022-02-11 00:46:10,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:46:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4582 transitions. [2022-02-11 00:46:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:10,975 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:10,975 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:10,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-02-11 00:46:11,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-11 00:46:11,175 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:11,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:11,175 INFO L85 PathProgramCache]: Analyzing trace with hash 911530733, now seen corresponding path program 62 times [2022-02-11 00:46:11,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:11,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542366784] [2022-02-11 00:46:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:11,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:11,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:11,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542366784] [2022-02-11 00:46:11,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542366784] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:11,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010288922] [2022-02-11 00:46:11,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:46:11,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:11,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:11,400 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:11,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-11 00:46:11,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:46:11,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:11,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:46:11,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:11,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:11,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:11,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:11,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:46:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:11,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:12,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:12,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:12,405 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 41 treesize of output 56 [2022-02-11 00:46:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:12,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010288922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:12,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:12,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:46:12,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206805295] [2022-02-11 00:46:12,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:12,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:46:12,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:12,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:46:12,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:46:12,533 INFO L87 Difference]: Start difference. First operand 1371 states and 4582 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:13,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:13,931 INFO L93 Difference]: Finished difference Result 3295 states and 11576 transitions. [2022-02-11 00:46:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:46:13,931 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:13,937 INFO L225 Difference]: With dead ends: 3295 [2022-02-11 00:46:13,937 INFO L226 Difference]: Without dead ends: 3283 [2022-02-11 00:46:13,937 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=407, Invalid=3133, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:46:13,938 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 183 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 982 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:13,938 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 117 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 696 Invalid, 0 Unknown, 982 Unchecked, 0.3s Time] [2022-02-11 00:46:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2022-02-11 00:46:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 1421. [2022-02-11 00:46:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.3422535211267608) internal successors, (4746), 1420 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4746 transitions. [2022-02-11 00:46:13,967 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4746 transitions. Word has length 24 [2022-02-11 00:46:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:13,967 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 4746 transitions. [2022-02-11 00:46:13,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4746 transitions. [2022-02-11 00:46:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:13,969 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:13,969 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:13,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-11 00:46:14,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-11 00:46:14,169 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:14,170 INFO L85 PathProgramCache]: Analyzing trace with hash -743780497, now seen corresponding path program 63 times [2022-02-11 00:46:14,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:14,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618987907] [2022-02-11 00:46:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:14,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:14,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:14,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618987907] [2022-02-11 00:46:14,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618987907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:14,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628012229] [2022-02-11 00:46:14,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:46:14,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:14,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:14,405 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:14,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-11 00:46:14,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:46:14,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:14,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:46:14,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:14,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:14,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:14,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:14,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:14,888 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 29 treesize of output 17 [2022-02-11 00:46:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:14,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:15,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:15,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:15,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-02-11 00:46:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:15,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628012229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:15,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:15,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:46:15,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077497520] [2022-02-11 00:46:15,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:15,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:15,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:15,416 INFO L87 Difference]: Start difference. First operand 1421 states and 4746 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:18,256 INFO L93 Difference]: Finished difference Result 2354 states and 7764 transitions. [2022-02-11 00:46:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 00:46:18,256 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:18,260 INFO L225 Difference]: With dead ends: 2354 [2022-02-11 00:46:18,260 INFO L226 Difference]: Without dead ends: 2342 [2022-02-11 00:46:18,262 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=579, Invalid=5121, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:46:18,262 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 391 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 4193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1867 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:18,262 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 234 Invalid, 4193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2258 Invalid, 0 Unknown, 1867 Unchecked, 0.9s Time] [2022-02-11 00:46:18,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-02-11 00:46:18,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1445. [2022-02-11 00:46:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.335872576177285) internal successors, (4817), 1444 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4817 transitions. [2022-02-11 00:46:18,283 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4817 transitions. Word has length 24 [2022-02-11 00:46:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:18,284 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 4817 transitions. [2022-02-11 00:46:18,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4817 transitions. [2022-02-11 00:46:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:18,285 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:18,285 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:18,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-11 00:46:18,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:18,486 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:18,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1925562905, now seen corresponding path program 64 times [2022-02-11 00:46:18,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:18,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160810654] [2022-02-11 00:46:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:18,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:18,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:18,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160810654] [2022-02-11 00:46:18,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160810654] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:18,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471192583] [2022-02-11 00:46:18,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:18,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:18,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:18,701 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:18,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-11 00:46:18,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:18,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:18,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:18,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:18,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:18,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:18,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:18,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:46:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:19,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:19,242 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:46:19,242 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 20 treesize of output 43 [2022-02-11 00:46:19,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:19,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:19,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:19,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:19,294 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 20 treesize of output 3 [2022-02-11 00:46:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:19,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471192583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:19,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:19,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:46:19,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937650243] [2022-02-11 00:46:19,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:19,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:46:19,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:46:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:46:19,310 INFO L87 Difference]: Start difference. First operand 1445 states and 4817 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:46:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:20,815 INFO L93 Difference]: Finished difference Result 2494 states and 8183 transitions. [2022-02-11 00:46:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:46:20,815 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:46:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:20,819 INFO L225 Difference]: With dead ends: 2494 [2022-02-11 00:46:20,819 INFO L226 Difference]: Without dead ends: 2487 [2022-02-11 00:46:20,820 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=287, Invalid=2163, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:46:20,820 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 201 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:20,820 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 174 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1860 Invalid, 0 Unknown, 500 Unchecked, 0.7s Time] [2022-02-11 00:46:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2022-02-11 00:46:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1474. [2022-02-11 00:46:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.3346911065852) internal successors, (4912), 1473 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4912 transitions. [2022-02-11 00:46:20,842 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4912 transitions. Word has length 24 [2022-02-11 00:46:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:20,842 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 4912 transitions. [2022-02-11 00:46:20,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:46:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4912 transitions. [2022-02-11 00:46:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:20,844 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:20,844 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:20,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-02-11 00:46:21,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-02-11 00:46:21,045 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1055124371, now seen corresponding path program 65 times [2022-02-11 00:46:21,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:21,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200737586] [2022-02-11 00:46:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:21,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:21,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:21,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200737586] [2022-02-11 00:46:21,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200737586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:21,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719513314] [2022-02-11 00:46:21,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:46:21,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:21,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:21,286 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:21,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-11 00:46:21,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:46:21,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:21,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:21,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:21,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:21,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:21,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:21,528 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 37 treesize of output 21 [2022-02-11 00:46:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:21,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:21,817 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:46:21,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:46:21,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:21,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:21,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:21,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:21,862 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 20 treesize of output 3 [2022-02-11 00:46:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:21,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719513314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:21,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:21,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:46:21,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45917720] [2022-02-11 00:46:21,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:21,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:46:21,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:46:21,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:46:21,878 INFO L87 Difference]: Start difference. First operand 1474 states and 4912 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:23,516 INFO L93 Difference]: Finished difference Result 2507 states and 8478 transitions. [2022-02-11 00:46:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:46:23,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:23,521 INFO L225 Difference]: With dead ends: 2507 [2022-02-11 00:46:23,521 INFO L226 Difference]: Without dead ends: 2500 [2022-02-11 00:46:23,521 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=2029, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:46:23,522 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 733 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:23,522 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 124 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2248 Invalid, 0 Unknown, 733 Unchecked, 0.8s Time] [2022-02-11 00:46:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2022-02-11 00:46:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 1492. [2022-02-11 00:46:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3333333333333335) internal successors, (4970), 1491 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4970 transitions. [2022-02-11 00:46:23,543 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4970 transitions. Word has length 24 [2022-02-11 00:46:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:23,543 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 4970 transitions. [2022-02-11 00:46:23,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4970 transitions. [2022-02-11 00:46:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:23,546 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:23,546 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:23,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:23,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-02-11 00:46:23,746 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2135632231, now seen corresponding path program 66 times [2022-02-11 00:46:23,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:23,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099130374] [2022-02-11 00:46:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:23,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:23,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:23,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099130374] [2022-02-11 00:46:23,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099130374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:23,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423609025] [2022-02-11 00:46:23,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:46:23,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:23,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:23,966 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:23,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-11 00:46:23,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:46:23,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:23,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:46:23,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:24,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:24,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-02-11 00:46:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:24,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:25,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:25,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:25,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:25,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:25,201 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 41 treesize of output 7 [2022-02-11 00:46:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:25,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423609025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:25,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:25,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:46:25,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571886646] [2022-02-11 00:46:25,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:25,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:46:25,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:25,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:46:25,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:46:25,234 INFO L87 Difference]: Start difference. First operand 1492 states and 4970 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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) [2022-02-11 00:46:26,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:26,700 INFO L93 Difference]: Finished difference Result 2317 states and 7712 transitions. [2022-02-11 00:46:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:46:26,700 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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 [2022-02-11 00:46:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:26,705 INFO L225 Difference]: With dead ends: 2317 [2022-02-11 00:46:26,705 INFO L226 Difference]: Without dead ends: 2311 [2022-02-11 00:46:26,705 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=282, Invalid=2688, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:46:26,705 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:26,705 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 163 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1183 Invalid, 0 Unknown, 700 Unchecked, 0.5s Time] [2022-02-11 00:46:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2022-02-11 00:46:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1503. [2022-02-11 00:46:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.3302263648468706) internal successors, (5002), 1502 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5002 transitions. [2022-02-11 00:46:26,748 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5002 transitions. Word has length 24 [2022-02-11 00:46:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:26,748 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 5002 transitions. [2022-02-11 00:46:26,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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) [2022-02-11 00:46:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5002 transitions. [2022-02-11 00:46:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:26,750 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:26,750 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:26,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:26,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:26,950 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash 658794093, now seen corresponding path program 67 times [2022-02-11 00:46:26,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:26,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664920167] [2022-02-11 00:46:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:26,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:27,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:27,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664920167] [2022-02-11 00:46:27,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664920167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:27,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267907156] [2022-02-11 00:46:27,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:46:27,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:27,186 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:27,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-11 00:46:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:27,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:27,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:27,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:27,424 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 33 treesize of output 17 [2022-02-11 00:46:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:27,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:27,714 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:46:27,714 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 20 treesize of output 43 [2022-02-11 00:46:27,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:27,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:27,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:46:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:27,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267907156] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:27,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:27,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:46:27,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456980291] [2022-02-11 00:46:27,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:27,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:46:27,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:46:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:46:27,781 INFO L87 Difference]: Start difference. First operand 1503 states and 5002 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:28,909 INFO L93 Difference]: Finished difference Result 1956 states and 6536 transitions. [2022-02-11 00:46:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:46:28,909 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:46:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:28,912 INFO L225 Difference]: With dead ends: 1956 [2022-02-11 00:46:28,913 INFO L226 Difference]: Without dead ends: 1946 [2022-02-11 00:46:28,913 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:46:28,913 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 135 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:28,913 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 78 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1275 Invalid, 0 Unknown, 358 Unchecked, 0.5s Time] [2022-02-11 00:46:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-02-11 00:46:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1484. [2022-02-11 00:46:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.3391773432231964) internal successors, (4952), 1483 states have internal predecessors, (4952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4952 transitions. [2022-02-11 00:46:28,932 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4952 transitions. Word has length 24 [2022-02-11 00:46:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:28,932 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 4952 transitions. [2022-02-11 00:46:28,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4952 transitions. [2022-02-11 00:46:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:28,934 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:28,934 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:28,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:29,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:29,134 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1996948091, now seen corresponding path program 68 times [2022-02-11 00:46:29,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:29,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613910965] [2022-02-11 00:46:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:29,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:29,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:29,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613910965] [2022-02-11 00:46:29,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613910965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:29,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163442412] [2022-02-11 00:46:29,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:46:29,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:29,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:29,349 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:29,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-11 00:46:29,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:46:29,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:29,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:46:29,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:29,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:29,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:29,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:29,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:29,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:46:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:29,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:30,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:30,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:30,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:30,313 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 41 treesize of output 56 [2022-02-11 00:46:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:30,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163442412] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:30,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:30,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:46:30,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158236048] [2022-02-11 00:46:30,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:30,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:46:30,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:46:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:46:30,426 INFO L87 Difference]: Start difference. First operand 1484 states and 4952 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:33,238 INFO L93 Difference]: Finished difference Result 3982 states and 14201 transitions. [2022-02-11 00:46:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 00:46:33,238 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:33,246 INFO L225 Difference]: With dead ends: 3982 [2022-02-11 00:46:33,246 INFO L226 Difference]: Without dead ends: 3971 [2022-02-11 00:46:33,246 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=747, Invalid=5733, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 00:46:33,247 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 211 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1347 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:33,247 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 166 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 739 Invalid, 0 Unknown, 1347 Unchecked, 0.3s Time] [2022-02-11 00:46:33,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2022-02-11 00:46:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 1505. [2022-02-11 00:46:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.3397606382978724) internal successors, (5023), 1504 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5023 transitions. [2022-02-11 00:46:33,280 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5023 transitions. Word has length 24 [2022-02-11 00:46:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:33,281 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 5023 transitions. [2022-02-11 00:46:33,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5023 transitions. [2022-02-11 00:46:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:33,283 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:33,283 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:33,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:33,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-02-11 00:46:33,483 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash -682668071, now seen corresponding path program 69 times [2022-02-11 00:46:33,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:33,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091483204] [2022-02-11 00:46:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:33,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:33,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:33,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091483204] [2022-02-11 00:46:33,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091483204] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:33,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344788821] [2022-02-11 00:46:33,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:46:33,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:33,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:33,699 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:33,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-11 00:46:33,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:46:33,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:46:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:34,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:34,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:34,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:34,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:34,037 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 29 treesize of output 17 [2022-02-11 00:46:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:34,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:34,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:34,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:34,411 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 37 treesize of output 54 [2022-02-11 00:46:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:34,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344788821] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:34,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:34,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:46:34,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321252048] [2022-02-11 00:46:34,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:34,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:46:34,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:46:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:46:34,507 INFO L87 Difference]: Start difference. First operand 1505 states and 5023 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:35,484 INFO L93 Difference]: Finished difference Result 1914 states and 6410 transitions. [2022-02-11 00:46:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:46:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:35,487 INFO L225 Difference]: With dead ends: 1914 [2022-02-11 00:46:35,487 INFO L226 Difference]: Without dead ends: 1909 [2022-02-11 00:46:35,488 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:46:35,488 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:35,488 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 104 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1242 Invalid, 0 Unknown, 190 Unchecked, 0.5s Time] [2022-02-11 00:46:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-02-11 00:46:35,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1506. [2022-02-11 00:46:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.338870431893688) internal successors, (5025), 1505 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5025 transitions. [2022-02-11 00:46:35,507 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5025 transitions. Word has length 24 [2022-02-11 00:46:35,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:35,507 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 5025 transitions. [2022-02-11 00:46:35,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5025 transitions. [2022-02-11 00:46:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:35,509 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:35,509 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:35,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-11 00:46:35,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:35,709 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2004616198, now seen corresponding path program 2 times [2022-02-11 00:46:35,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:35,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468183772] [2022-02-11 00:46:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:35,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:35,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:35,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468183772] [2022-02-11 00:46:35,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468183772] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:35,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975002297] [2022-02-11 00:46:35,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:46:35,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:35,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:35,930 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:35,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-11 00:46:35,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:46:35,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:35,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:46:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:36,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:36,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:36,257 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:46:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:36,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:36,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:36,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:36,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:36,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-02-11 00:46:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:37,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975002297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:37,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:37,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:46:37,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488958144] [2022-02-11 00:46:37,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:37,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:46:37,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:37,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:46:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:46:37,009 INFO L87 Difference]: Start difference. First operand 1506 states and 5025 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:39,151 INFO L93 Difference]: Finished difference Result 4648 states and 16987 transitions. [2022-02-11 00:46:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:46:39,151 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:39,161 INFO L225 Difference]: With dead ends: 4648 [2022-02-11 00:46:39,161 INFO L226 Difference]: Without dead ends: 4646 [2022-02-11 00:46:39,162 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=738, Invalid=3818, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:46:39,162 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 163 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1502 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:39,162 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 198 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 919 Invalid, 0 Unknown, 1502 Unchecked, 0.4s Time] [2022-02-11 00:46:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2022-02-11 00:46:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 1557. [2022-02-11 00:46:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3553984575835476) internal successors, (5221), 1556 states have internal predecessors, (5221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5221 transitions. [2022-02-11 00:46:39,202 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5221 transitions. Word has length 24 [2022-02-11 00:46:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:39,202 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 5221 transitions. [2022-02-11 00:46:39,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5221 transitions. [2022-02-11 00:46:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:39,204 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:39,204 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:39,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:39,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-11 00:46:39,404 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1429097984, now seen corresponding path program 3 times [2022-02-11 00:46:39,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:39,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583480909] [2022-02-11 00:46:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:39,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:39,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:39,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583480909] [2022-02-11 00:46:39,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583480909] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:39,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414183725] [2022-02-11 00:46:39,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:46:39,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:39,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:39,651 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:39,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-11 00:46:39,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:46:39,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:39,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:46:39,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:40,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:40,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:40,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:40,097 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 29 treesize of output 17 [2022-02-11 00:46:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:40,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:40,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:40,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:40,468 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 37 treesize of output 56 [2022-02-11 00:46:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:40,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414183725] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:40,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:40,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:46:40,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771075332] [2022-02-11 00:46:40,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:40,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:40,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:40,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:40,564 INFO L87 Difference]: Start difference. First operand 1557 states and 5221 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:46:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:42,888 INFO L93 Difference]: Finished difference Result 2310 states and 7511 transitions. [2022-02-11 00:46:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:46:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:46:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:42,892 INFO L225 Difference]: With dead ends: 2310 [2022-02-11 00:46:42,892 INFO L226 Difference]: Without dead ends: 2298 [2022-02-11 00:46:42,892 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=420, Invalid=3740, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:46:42,892 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 265 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 875 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:42,892 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 242 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2338 Invalid, 0 Unknown, 875 Unchecked, 0.9s Time] [2022-02-11 00:46:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-02-11 00:46:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1566. [2022-02-11 00:46:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3501597444089457) internal successors, (5243), 1565 states have internal predecessors, (5243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5243 transitions. [2022-02-11 00:46:42,915 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5243 transitions. Word has length 24 [2022-02-11 00:46:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:42,915 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5243 transitions. [2022-02-11 00:46:42,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:46:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5243 transitions. [2022-02-11 00:46:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:42,917 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:42,917 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:42,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-02-11 00:46:43,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-11 00:46:43,118 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash -976071078, now seen corresponding path program 4 times [2022-02-11 00:46:43,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:43,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920339899] [2022-02-11 00:46:43,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:43,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:43,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:43,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920339899] [2022-02-11 00:46:43,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920339899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:43,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627340900] [2022-02-11 00:46:43,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:43,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:43,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:43,341 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:43,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-11 00:46:43,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:43,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:43,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:43,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:43,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:43,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:43,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:43,582 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 33 treesize of output 17 [2022-02-11 00:46:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:43,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:43,871 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:46:43,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:46:43,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:43,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:43,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:43,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:43,920 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 20 treesize of output 3 [2022-02-11 00:46:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:43,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627340900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:43,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:43,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:46:43,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704928810] [2022-02-11 00:46:43,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:43,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:46:43,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:46:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:46:43,935 INFO L87 Difference]: Start difference. First operand 1566 states and 5243 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:45,106 INFO L93 Difference]: Finished difference Result 2263 states and 7642 transitions. [2022-02-11 00:46:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:46:45,106 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:45,111 INFO L225 Difference]: With dead ends: 2263 [2022-02-11 00:46:45,111 INFO L226 Difference]: Without dead ends: 2256 [2022-02-11 00:46:45,111 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:46:45,111 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:45,111 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 107 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1401 Invalid, 0 Unknown, 659 Unchecked, 0.5s Time] [2022-02-11 00:46:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-02-11 00:46:45,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1559. [2022-02-11 00:46:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.3581514762516047) internal successors, (5232), 1558 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5232 transitions. [2022-02-11 00:46:45,141 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5232 transitions. Word has length 24 [2022-02-11 00:46:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:45,141 INFO L470 AbstractCegarLoop]: Abstraction has 1559 states and 5232 transitions. [2022-02-11 00:46:45,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5232 transitions. [2022-02-11 00:46:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:45,143 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:45,144 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:45,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-11 00:46:45,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:45,344 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1659655765, now seen corresponding path program 70 times [2022-02-11 00:46:45,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:45,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569808147] [2022-02-11 00:46:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:45,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:45,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569808147] [2022-02-11 00:46:45,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569808147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:45,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724362623] [2022-02-11 00:46:45,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:45,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:45,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:45,568 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:45,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-11 00:46:45,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:45,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:45,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:45,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:45,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:45,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:45,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:45,815 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 33 treesize of output 17 [2022-02-11 00:46:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:45,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:46,107 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:46:46,108 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 20 treesize of output 43 [2022-02-11 00:46:46,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:46,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:46,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:46,159 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 20 treesize of output 3 [2022-02-11 00:46:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:46,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724362623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:46,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:46,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:46:46,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433942849] [2022-02-11 00:46:46,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:46,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:46:46,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:46:46,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:46:46,175 INFO L87 Difference]: Start difference. First operand 1559 states and 5232 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:47,363 INFO L93 Difference]: Finished difference Result 2081 states and 6948 transitions. [2022-02-11 00:46:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:46:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:47,367 INFO L225 Difference]: With dead ends: 2081 [2022-02-11 00:46:47,367 INFO L226 Difference]: Without dead ends: 2074 [2022-02-11 00:46:47,367 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:46:47,367 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 123 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:47,367 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 101 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1404 Invalid, 0 Unknown, 500 Unchecked, 0.5s Time] [2022-02-11 00:46:47,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-02-11 00:46:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1560. [2022-02-11 00:46:47,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.3598460551635663) internal successors, (5238), 1559 states have internal predecessors, (5238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5238 transitions. [2022-02-11 00:46:47,388 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5238 transitions. Word has length 24 [2022-02-11 00:46:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:47,389 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 5238 transitions. [2022-02-11 00:46:47,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5238 transitions. [2022-02-11 00:46:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:47,391 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:47,391 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:47,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-11 00:46:47,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-11 00:46:47,591 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:47,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash 579147905, now seen corresponding path program 71 times [2022-02-11 00:46:47,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:47,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359686113] [2022-02-11 00:46:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:47,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:47,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:47,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359686113] [2022-02-11 00:46:47,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359686113] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:47,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225743856] [2022-02-11 00:46:47,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:46:47,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:47,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:47,842 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:47,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-11 00:46:47,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:46:47,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:48,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:48,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:48,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:48,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:48,084 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 37 treesize of output 21 [2022-02-11 00:46:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:48,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:48,373 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:46:48,374 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 20 treesize of output 43 [2022-02-11 00:46:48,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:48,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:48,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:48,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:48,426 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 20 treesize of output 3 [2022-02-11 00:46:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:48,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225743856] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:48,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:48,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:46:48,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569728193] [2022-02-11 00:46:48,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:48,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:46:48,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:46:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:46:48,442 INFO L87 Difference]: Start difference. First operand 1560 states and 5238 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:49,954 INFO L93 Difference]: Finished difference Result 2500 states and 8502 transitions. [2022-02-11 00:46:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:46:49,954 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:49,958 INFO L225 Difference]: With dead ends: 2500 [2022-02-11 00:46:49,958 INFO L226 Difference]: Without dead ends: 2490 [2022-02-11 00:46:49,958 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:46:49,959 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 157 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:49,959 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 115 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1705 Invalid, 0 Unknown, 697 Unchecked, 0.8s Time] [2022-02-11 00:46:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2022-02-11 00:46:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1558. [2022-02-11 00:46:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.3538856775850996) internal successors, (5222), 1557 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5222 transitions. [2022-02-11 00:46:49,983 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5222 transitions. Word has length 24 [2022-02-11 00:46:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:49,983 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 5222 transitions. [2022-02-11 00:46:49,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:49,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5222 transitions. [2022-02-11 00:46:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:49,985 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:49,985 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:50,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-11 00:46:50,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-11 00:46:50,195 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1192444841, now seen corresponding path program 72 times [2022-02-11 00:46:50,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:50,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325020119] [2022-02-11 00:46:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:50,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:50,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:50,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325020119] [2022-02-11 00:46:50,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325020119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:50,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781171363] [2022-02-11 00:46:50,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:46:50,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:50,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:50,409 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:50,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-11 00:46:50,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:46:50,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:50,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:46:50,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:50,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:50,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:50,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:50,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-02-11 00:46:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:51,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:51,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:51,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:51,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:51,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-02-11 00:46:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:51,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781171363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:51,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:51,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:46:51,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723753765] [2022-02-11 00:46:51,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:51,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:51,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:51,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:51,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:51,717 INFO L87 Difference]: Start difference. First operand 1558 states and 5222 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:46:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:53,131 INFO L93 Difference]: Finished difference Result 2404 states and 7972 transitions. [2022-02-11 00:46:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:46:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-02-11 00:46:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:53,135 INFO L225 Difference]: With dead ends: 2404 [2022-02-11 00:46:53,135 INFO L226 Difference]: Without dead ends: 2394 [2022-02-11 00:46:53,136 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=301, Invalid=3121, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:46:53,136 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 193 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1294 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:53,136 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 215 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1083 Invalid, 0 Unknown, 1294 Unchecked, 0.4s Time] [2022-02-11 00:46:53,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2022-02-11 00:46:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1577. [2022-02-11 00:46:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 3.350253807106599) internal successors, (5280), 1576 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 5280 transitions. [2022-02-11 00:46:53,160 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 5280 transitions. Word has length 24 [2022-02-11 00:46:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:53,160 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 5280 transitions. [2022-02-11 00:46:53,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:46:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 5280 transitions. [2022-02-11 00:46:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:53,162 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:53,162 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:53,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-02-11 00:46:53,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:53,363 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -604506518, now seen corresponding path program 10 times [2022-02-11 00:46:53,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:53,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599712695] [2022-02-11 00:46:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:53,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:53,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:53,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599712695] [2022-02-11 00:46:53,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599712695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:53,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560811986] [2022-02-11 00:46:53,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:53,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:53,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:53,569 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:53,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-11 00:46:53,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:53,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:53,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:53,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:53,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:53,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:53,859 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 33 treesize of output 17 [2022-02-11 00:46:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:53,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:54,132 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:46:54,132 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 20 treesize of output 43 [2022-02-11 00:46:54,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:54,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:54,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:54,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:54,185 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 20 treesize of output 3 [2022-02-11 00:46:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:54,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560811986] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:54,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:54,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:46:54,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795369698] [2022-02-11 00:46:54,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:54,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:46:54,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:46:54,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:46:54,201 INFO L87 Difference]: Start difference. First operand 1577 states and 5280 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:46:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:56,111 INFO L93 Difference]: Finished difference Result 2733 states and 9077 transitions. [2022-02-11 00:46:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:46:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:46:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:56,117 INFO L225 Difference]: With dead ends: 2733 [2022-02-11 00:46:56,117 INFO L226 Difference]: Without dead ends: 2726 [2022-02-11 00:46:56,117 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=302, Invalid=2890, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:46:56,118 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 231 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1306 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:56,118 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 207 Invalid, 3949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2607 Invalid, 0 Unknown, 1306 Unchecked, 1.0s Time] [2022-02-11 00:46:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-02-11 00:46:56,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1484. [2022-02-11 00:46:56,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.390424814565071) internal successors, (5028), 1483 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 5028 transitions. [2022-02-11 00:46:56,152 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 5028 transitions. Word has length 24 [2022-02-11 00:46:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:56,152 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 5028 transitions. [2022-02-11 00:46:56,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:46:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 5028 transitions. [2022-02-11 00:46:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:56,154 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:56,154 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:56,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:56,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:56,368 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:46:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1535362685, now seen corresponding path program 73 times [2022-02-11 00:46:56,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:56,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779825614] [2022-02-11 00:46:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:56,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:56,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:56,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779825614] [2022-02-11 00:46:56,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779825614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:56,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41207463] [2022-02-11 00:46:56,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:46:56,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:56,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:56,568 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:56,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-11 00:46:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:56,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:56,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:56,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:56,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:56,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:56,846 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:46:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:56,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:57,097 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:46:57,098 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 20 treesize of output 43 [2022-02-11 00:46:57,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:57,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:57,146 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 20 treesize of output 3 [2022-02-11 00:46:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:57,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41207463] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:57,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:57,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:46:57,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731047984] [2022-02-11 00:46:57,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:57,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:46:57,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:46:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:46:57,161 INFO L87 Difference]: Start difference. First operand 1484 states and 5028 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:00,545 INFO L93 Difference]: Finished difference Result 4104 states and 14266 transitions. [2022-02-11 00:47:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 00:47:00,546 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:47:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:00,553 INFO L225 Difference]: With dead ends: 4104 [2022-02-11 00:47:00,554 INFO L226 Difference]: Without dead ends: 4097 [2022-02-11 00:47:00,554 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=874, Invalid=6266, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 00:47:00,554 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:00,554 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 158 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2538 Invalid, 0 Unknown, 824 Unchecked, 1.1s Time] [2022-02-11 00:47:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2022-02-11 00:47:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 1460. [2022-02-11 00:47:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.3927347498286498) internal successors, (4950), 1459 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4950 transitions. [2022-02-11 00:47:00,590 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4950 transitions. Word has length 24 [2022-02-11 00:47:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:00,590 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 4950 transitions. [2022-02-11 00:47:00,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4950 transitions. [2022-02-11 00:47:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:00,592 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:00,592 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:00,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-11 00:47:00,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-11 00:47:00,807 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:00,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash -521330513, now seen corresponding path program 74 times [2022-02-11 00:47:00,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:00,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583814126] [2022-02-11 00:47:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:01,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:01,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583814126] [2022-02-11 00:47:01,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583814126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:01,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124305530] [2022-02-11 00:47:01,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:01,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:01,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:01,021 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:01,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-11 00:47:01,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:01,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:01,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:47:01,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:01,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:01,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:01,340 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:47:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:01,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:01,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:01,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:01,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:01,991 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 41 treesize of output 56 [2022-02-11 00:47:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:02,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124305530] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:02,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:02,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:47:02,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094992892] [2022-02-11 00:47:02,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:02,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:47:02,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:02,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:47:02,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:47:02,101 INFO L87 Difference]: Start difference. First operand 1460 states and 4950 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:04,261 INFO L93 Difference]: Finished difference Result 3094 states and 11094 transitions. [2022-02-11 00:47:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:47:04,261 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:47:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:04,267 INFO L225 Difference]: With dead ends: 3094 [2022-02-11 00:47:04,267 INFO L226 Difference]: Without dead ends: 3084 [2022-02-11 00:47:04,267 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=600, Invalid=4370, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:47:04,267 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 204 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1359 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:04,267 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 156 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 749 Invalid, 0 Unknown, 1359 Unchecked, 0.3s Time] [2022-02-11 00:47:04,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2022-02-11 00:47:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1504. [2022-02-11 00:47:04,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.4105123087159015) internal successors, (5126), 1503 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) [2022-02-11 00:47:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5126 transitions. [2022-02-11 00:47:04,294 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5126 transitions. Word has length 24 [2022-02-11 00:47:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:04,294 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 5126 transitions. [2022-02-11 00:47:04,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:04,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5126 transitions. [2022-02-11 00:47:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:04,296 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:04,296 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:04,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-11 00:47:04,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:04,496 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash 792949507, now seen corresponding path program 75 times [2022-02-11 00:47:04,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:04,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267853422] [2022-02-11 00:47:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:04,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:04,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:04,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267853422] [2022-02-11 00:47:04,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267853422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:04,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426914739] [2022-02-11 00:47:04,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:47:04,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:04,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:04,718 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:04,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-11 00:47:04,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:47:04,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:04,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:47:04,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:04,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:04,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:04,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:04,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:04,995 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:47:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:05,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:05,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:05,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:05,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:05,677 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 41 treesize of output 56 [2022-02-11 00:47:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:05,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426914739] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:05,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:05,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:47:05,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689230476] [2022-02-11 00:47:05,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:05,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:47:05,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:05,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:47:05,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:47:05,791 INFO L87 Difference]: Start difference. First operand 1504 states and 5126 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:47:08,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:08,778 INFO L93 Difference]: Finished difference Result 3055 states and 10444 transitions. [2022-02-11 00:47:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:47:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 [2022-02-11 00:47:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:08,784 INFO L225 Difference]: With dead ends: 3055 [2022-02-11 00:47:08,784 INFO L226 Difference]: Without dead ends: 3042 [2022-02-11 00:47:08,785 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 33 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:47:08,785 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 320 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2509 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:08,785 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 176 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1102 Invalid, 0 Unknown, 2509 Unchecked, 0.5s Time] [2022-02-11 00:47:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-02-11 00:47:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1552. [2022-02-11 00:47:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.4165054803352675) internal successors, (5299), 1551 states have internal predecessors, (5299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5299 transitions. [2022-02-11 00:47:08,814 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5299 transitions. Word has length 24 [2022-02-11 00:47:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:08,814 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5299 transitions. [2022-02-11 00:47:08,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:47:08,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5299 transitions. [2022-02-11 00:47:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:08,816 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:08,816 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:08,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-02-11 00:47:09,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:09,017 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash -239064859, now seen corresponding path program 76 times [2022-02-11 00:47:09,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:09,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806512678] [2022-02-11 00:47:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:09,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:09,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:09,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806512678] [2022-02-11 00:47:09,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806512678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:09,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028267903] [2022-02-11 00:47:09,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:47:09,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:09,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:09,249 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:09,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-11 00:47:09,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:47:09,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:09,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:09,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:09,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:09,527 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 33 treesize of output 17 [2022-02-11 00:47:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:09,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:09,796 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:47:09,796 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 20 treesize of output 43 [2022-02-11 00:47:09,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:09,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:09,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:09,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:09,847 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 20 treesize of output 3 [2022-02-11 00:47:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:09,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028267903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:09,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:09,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:47:09,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899553031] [2022-02-11 00:47:09,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:09,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:47:09,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:47:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:47:09,862 INFO L87 Difference]: Start difference. First operand 1552 states and 5299 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:12,161 INFO L93 Difference]: Finished difference Result 3034 states and 10291 transitions. [2022-02-11 00:47:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:47:12,161 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:47:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:12,167 INFO L225 Difference]: With dead ends: 3034 [2022-02-11 00:47:12,167 INFO L226 Difference]: Without dead ends: 3026 [2022-02-11 00:47:12,167 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:47:12,168 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 184 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:12,168 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 174 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2181 Invalid, 0 Unknown, 339 Unchecked, 0.9s Time] [2022-02-11 00:47:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2022-02-11 00:47:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 1563. [2022-02-11 00:47:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.4161331626120357) internal successors, (5336), 1562 states have internal predecessors, (5336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5336 transitions. [2022-02-11 00:47:12,194 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5336 transitions. Word has length 24 [2022-02-11 00:47:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:12,195 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 5336 transitions. [2022-02-11 00:47:12,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5336 transitions. [2022-02-11 00:47:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:12,197 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:12,197 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:12,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:12,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:12,397 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:12,398 INFO L85 PathProgramCache]: Analyzing trace with hash -5292699, now seen corresponding path program 77 times [2022-02-11 00:47:12,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:12,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972628449] [2022-02-11 00:47:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:12,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:12,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:12,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972628449] [2022-02-11 00:47:12,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972628449] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:12,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692298551] [2022-02-11 00:47:12,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:47:12,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:12,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:12,652 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:12,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-11 00:47:12,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:47:12,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:12,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:12,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:12,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:12,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:12,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:12,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:12,915 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 33 treesize of output 17 [2022-02-11 00:47:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:12,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:13,211 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:47:13,211 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 20 treesize of output 43 [2022-02-11 00:47:13,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:13,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:13,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:13,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:13,256 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 20 treesize of output 3 [2022-02-11 00:47:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:13,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692298551] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:13,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:13,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:47:13,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023507980] [2022-02-11 00:47:13,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:13,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:47:13,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:13,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:47:13,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:47:13,271 INFO L87 Difference]: Start difference. First operand 1563 states and 5336 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:14,906 INFO L93 Difference]: Finished difference Result 2326 states and 7964 transitions. [2022-02-11 00:47:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:47:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:47:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:14,910 INFO L225 Difference]: With dead ends: 2326 [2022-02-11 00:47:14,910 INFO L226 Difference]: Without dead ends: 2318 [2022-02-11 00:47:14,910 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:47:14,911 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 149 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 952 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:14,911 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 106 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1743 Invalid, 0 Unknown, 952 Unchecked, 0.7s Time] [2022-02-11 00:47:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-02-11 00:47:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1564. [2022-02-11 00:47:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.417786308381318) internal successors, (5342), 1563 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5342 transitions. [2022-02-11 00:47:14,933 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5342 transitions. Word has length 24 [2022-02-11 00:47:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:14,934 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 5342 transitions. [2022-02-11 00:47:14,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5342 transitions. [2022-02-11 00:47:14,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:14,936 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:14,936 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:14,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-02-11 00:47:15,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:15,147 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:15,147 INFO L85 PathProgramCache]: Analyzing trace with hash -109982140, now seen corresponding path program 5 times [2022-02-11 00:47:15,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:15,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351932133] [2022-02-11 00:47:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:15,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:15,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:15,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351932133] [2022-02-11 00:47:15,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351932133] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:15,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459226319] [2022-02-11 00:47:15,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:47:15,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:15,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:15,375 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:15,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-11 00:47:15,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:47:15,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:15,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:15,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:15,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:15,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:15,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:15,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:15,667 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 33 treesize of output 17 [2022-02-11 00:47:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:15,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:15,924 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:47:15,924 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 20 treesize of output 43 [2022-02-11 00:47:15,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:15,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:15,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:15,971 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 20 treesize of output 3 [2022-02-11 00:47:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:15,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459226319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:15,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:15,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:47:15,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085097859] [2022-02-11 00:47:15,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:15,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:47:15,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:47:15,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:47:15,988 INFO L87 Difference]: Start difference. First operand 1564 states and 5342 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:19,008 INFO L93 Difference]: Finished difference Result 3582 states and 12461 transitions. [2022-02-11 00:47:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:47:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:47:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:19,015 INFO L225 Difference]: With dead ends: 3582 [2022-02-11 00:47:19,016 INFO L226 Difference]: Without dead ends: 3574 [2022-02-11 00:47:19,016 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=697, Invalid=5003, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:47:19,016 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 225 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 734 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:19,016 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 180 Invalid, 3426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2560 Invalid, 0 Unknown, 734 Unchecked, 1.1s Time] [2022-02-11 00:47:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2022-02-11 00:47:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 1543. [2022-02-11 00:47:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.4163424124513617) internal successors, (5268), 1542 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 5268 transitions. [2022-02-11 00:47:19,046 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 5268 transitions. Word has length 24 [2022-02-11 00:47:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:19,046 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 5268 transitions. [2022-02-11 00:47:19,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 5268 transitions. [2022-02-11 00:47:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:19,049 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:19,049 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:19,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:19,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-11 00:47:19,265 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1904300301, now seen corresponding path program 78 times [2022-02-11 00:47:19,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:19,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866408160] [2022-02-11 00:47:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:19,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:19,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:19,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866408160] [2022-02-11 00:47:19,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866408160] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:19,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260559467] [2022-02-11 00:47:19,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:47:19,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:19,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:19,491 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:19,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-11 00:47:19,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:47:19,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:19,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:47:19,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:19,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:19,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:19,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:19,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:19,995 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-02-11 00:47:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:20,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:20,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:20,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:20,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:20,905 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 37 treesize of output 7 [2022-02-11 00:47:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:20,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260559467] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:20,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:20,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:47:20,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650200445] [2022-02-11 00:47:20,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:20,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:47:20,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:47:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:47:20,946 INFO L87 Difference]: Start difference. First operand 1543 states and 5268 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:22,027 INFO L93 Difference]: Finished difference Result 1958 states and 6704 transitions. [2022-02-11 00:47:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:47:22,028 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:47:22,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:22,031 INFO L225 Difference]: With dead ends: 1958 [2022-02-11 00:47:22,031 INFO L226 Difference]: Without dead ends: 1952 [2022-02-11 00:47:22,032 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=378, Invalid=2274, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:47:22,032 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 136 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1076 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:22,032 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 173 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 493 Invalid, 0 Unknown, 1076 Unchecked, 0.2s Time] [2022-02-11 00:47:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2022-02-11 00:47:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1625. [2022-02-11 00:47:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.4538177339901477) internal successors, (5609), 1624 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5609 transitions. [2022-02-11 00:47:22,058 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5609 transitions. Word has length 24 [2022-02-11 00:47:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:22,058 INFO L470 AbstractCegarLoop]: Abstraction has 1625 states and 5609 transitions. [2022-02-11 00:47:22,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5609 transitions. [2022-02-11 00:47:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:22,060 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:22,060 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:22,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-02-11 00:47:22,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-11 00:47:22,261 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:22,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1475585507, now seen corresponding path program 79 times [2022-02-11 00:47:22,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:22,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357782000] [2022-02-11 00:47:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:22,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:22,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:22,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357782000] [2022-02-11 00:47:22,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357782000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:22,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975151532] [2022-02-11 00:47:22,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:47:22,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:22,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:22,490 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:22,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-11 00:47:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:22,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:22,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:22,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:22,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:22,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:22,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:22,787 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 37 treesize of output 21 [2022-02-11 00:47:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:22,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:23,043 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:47:23,044 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 20 treesize of output 43 [2022-02-11 00:47:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:23,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:47:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:23,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975151532] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:23,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:23,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:47:23,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213227029] [2022-02-11 00:47:23,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:23,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:47:23,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:23,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:47:23,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:47:23,105 INFO L87 Difference]: Start difference. First operand 1625 states and 5609 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:25,967 INFO L93 Difference]: Finished difference Result 3914 states and 13821 transitions. [2022-02-11 00:47:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:47:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:47:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:25,976 INFO L225 Difference]: With dead ends: 3914 [2022-02-11 00:47:25,976 INFO L226 Difference]: Without dead ends: 3907 [2022-02-11 00:47:25,976 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=608, Invalid=4362, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:47:25,977 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:25,977 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 159 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2208 Invalid, 0 Unknown, 711 Unchecked, 1.0s Time] [2022-02-11 00:47:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-02-11 00:47:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 1562. [2022-02-11 00:47:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.4228058936579115) internal successors, (5343), 1561 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5343 transitions. [2022-02-11 00:47:26,016 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5343 transitions. Word has length 24 [2022-02-11 00:47:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:26,016 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 5343 transitions. [2022-02-11 00:47:26,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5343 transitions. [2022-02-11 00:47:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:26,018 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:26,018 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:26,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:26,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-11 00:47:26,219 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:26,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1011927326, now seen corresponding path program 11 times [2022-02-11 00:47:26,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:26,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487688084] [2022-02-11 00:47:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:26,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:26,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:26,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487688084] [2022-02-11 00:47:26,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487688084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:26,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683716536] [2022-02-11 00:47:26,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:47:26,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:26,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:26,472 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:26,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-11 00:47:26,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:47:26,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:26,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:26,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:26,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:26,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:26,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:26,780 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 37 treesize of output 21 [2022-02-11 00:47:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:26,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:27,064 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:47:27,064 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 20 treesize of output 43 [2022-02-11 00:47:27,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:27,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:27,118 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 20 treesize of output 3 [2022-02-11 00:47:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:27,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683716536] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:27,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:27,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:47:27,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406552896] [2022-02-11 00:47:27,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:27,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:47:27,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:27,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:47:27,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:47:27,135 INFO L87 Difference]: Start difference. First operand 1562 states and 5343 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:28,750 INFO L93 Difference]: Finished difference Result 2864 states and 10083 transitions. [2022-02-11 00:47:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:47:28,751 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:47:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:28,756 INFO L225 Difference]: With dead ends: 2864 [2022-02-11 00:47:28,756 INFO L226 Difference]: Without dead ends: 2860 [2022-02-11 00:47:28,757 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:47:28,757 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:28,757 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 186 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1956 Invalid, 0 Unknown, 700 Unchecked, 0.8s Time] [2022-02-11 00:47:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-02-11 00:47:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1483. [2022-02-11 00:47:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 3.3920377867746287) internal successors, (5027), 1482 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 5027 transitions. [2022-02-11 00:47:28,784 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 5027 transitions. Word has length 24 [2022-02-11 00:47:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:28,784 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 5027 transitions. [2022-02-11 00:47:28,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 5027 transitions. [2022-02-11 00:47:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:28,786 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:28,786 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:28,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-02-11 00:47:28,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:28,999 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash 50753249, now seen corresponding path program 80 times [2022-02-11 00:47:29,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:29,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892016675] [2022-02-11 00:47:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:29,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:29,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892016675] [2022-02-11 00:47:29,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892016675] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:29,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844786645] [2022-02-11 00:47:29,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:29,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:29,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:29,188 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:29,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-11 00:47:29,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:29,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:29,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:47:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:29,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:29,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:29,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:29,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:29,656 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 33 treesize of output 21 [2022-02-11 00:47:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:29,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:30,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:30,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:30,056 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 37 treesize of output 56 [2022-02-11 00:47:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:30,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844786645] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:30,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:30,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-02-11 00:47:30,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735274333] [2022-02-11 00:47:30,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:30,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:47:30,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:47:30,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:47:30,199 INFO L87 Difference]: Start difference. First operand 1483 states and 5027 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:31,526 INFO L93 Difference]: Finished difference Result 2603 states and 8217 transitions. [2022-02-11 00:47:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:47:31,526 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:47:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:31,531 INFO L225 Difference]: With dead ends: 2603 [2022-02-11 00:47:31,532 INFO L226 Difference]: Without dead ends: 2591 [2022-02-11 00:47:31,532 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=352, Invalid=3430, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:47:31,532 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 703 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:31,532 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 366 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1309 Invalid, 0 Unknown, 703 Unchecked, 0.5s Time] [2022-02-11 00:47:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-02-11 00:47:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1556. [2022-02-11 00:47:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.347909967845659) internal successors, (5206), 1555 states have internal predecessors, (5206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5206 transitions. [2022-02-11 00:47:31,562 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5206 transitions. Word has length 24 [2022-02-11 00:47:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:31,562 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 5206 transitions. [2022-02-11 00:47:31,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5206 transitions. [2022-02-11 00:47:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:31,572 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:31,572 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:31,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-02-11 00:47:31,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:31,772 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2103294839, now seen corresponding path program 81 times [2022-02-11 00:47:31,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:31,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032486071] [2022-02-11 00:47:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:31,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:31,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032486071] [2022-02-11 00:47:31,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032486071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:31,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307830388] [2022-02-11 00:47:31,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:47:31,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:31,959 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:31,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-11 00:47:31,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:47:31,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:47:31,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:32,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:32,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:32,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:32,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:32,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:47:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:32,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:32,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:32,875 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 37 treesize of output 56 [2022-02-11 00:47:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:33,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307830388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:33,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:33,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-02-11 00:47:33,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291136891] [2022-02-11 00:47:33,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:33,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:47:33,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:47:33,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:47:33,033 INFO L87 Difference]: Start difference. First operand 1556 states and 5206 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:33,771 INFO L93 Difference]: Finished difference Result 2391 states and 7715 transitions. [2022-02-11 00:47:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:47:33,772 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:47:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:33,776 INFO L225 Difference]: With dead ends: 2391 [2022-02-11 00:47:33,776 INFO L226 Difference]: Without dead ends: 2380 [2022-02-11 00:47:33,777 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=2197, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:47:33,777 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 169 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:33,777 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 219 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 715 Invalid, 0 Unknown, 567 Unchecked, 0.3s Time] [2022-02-11 00:47:33,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2022-02-11 00:47:33,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1604. [2022-02-11 00:47:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.315658140985652) internal successors, (5315), 1603 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 5315 transitions. [2022-02-11 00:47:33,803 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 5315 transitions. Word has length 24 [2022-02-11 00:47:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:33,804 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 5315 transitions. [2022-02-11 00:47:33,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 5315 transitions. [2022-02-11 00:47:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:33,806 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:33,806 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:33,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:34,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-02-11 00:47:34,007 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:34,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:34,007 INFO L85 PathProgramCache]: Analyzing trace with hash 927226883, now seen corresponding path program 82 times [2022-02-11 00:47:34,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:34,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480493276] [2022-02-11 00:47:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:34,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:34,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:34,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480493276] [2022-02-11 00:47:34,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480493276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:34,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519003578] [2022-02-11 00:47:34,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:47:34,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:34,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:34,196 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:34,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-11 00:47:34,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:47:34,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:34,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:34,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:34,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:34,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:34,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:34,476 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 37 treesize of output 21 [2022-02-11 00:47:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:34,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:34,754 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:47:34,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:47:34,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:34,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:34,802 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 20 treesize of output 3 [2022-02-11 00:47:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:34,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519003578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:34,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:34,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:47:34,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927894803] [2022-02-11 00:47:34,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:34,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:47:34,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:47:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:47:34,817 INFO L87 Difference]: Start difference. First operand 1604 states and 5315 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:47:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:36,274 INFO L93 Difference]: Finished difference Result 2451 states and 7860 transitions. [2022-02-11 00:47:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:47:36,274 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:47:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:36,279 INFO L225 Difference]: With dead ends: 2451 [2022-02-11 00:47:36,279 INFO L226 Difference]: Without dead ends: 2444 [2022-02-11 00:47:36,279 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:47:36,280 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:36,280 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 244 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2232 Invalid, 0 Unknown, 1199 Unchecked, 0.8s Time] [2022-02-11 00:47:36,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-02-11 00:47:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1555. [2022-02-11 00:47:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 3.3474903474903477) internal successors, (5202), 1554 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 5202 transitions. [2022-02-11 00:47:36,304 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 5202 transitions. Word has length 24 [2022-02-11 00:47:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:36,304 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 5202 transitions. [2022-02-11 00:47:36,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:47:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 5202 transitions. [2022-02-11 00:47:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:36,307 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:36,307 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:36,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:36,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:36,511 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:36,511 INFO L85 PathProgramCache]: Analyzing trace with hash -295155111, now seen corresponding path program 83 times [2022-02-11 00:47:36,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:36,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027412324] [2022-02-11 00:47:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:36,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:36,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:36,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027412324] [2022-02-11 00:47:36,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027412324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:36,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394319739] [2022-02-11 00:47:36,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:47:36,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:36,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:36,732 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:36,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-11 00:47:36,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:47:36,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:36,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:36,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:37,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:37,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:37,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:47:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:37,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:37,353 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:47:37,353 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 20 treesize of output 43 [2022-02-11 00:47:37,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:37,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:37,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:37,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:37,399 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 20 treesize of output 3 [2022-02-11 00:47:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:37,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394319739] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:37,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:37,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:47:37,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575369658] [2022-02-11 00:47:37,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:37,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:47:37,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:37,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:47:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:47:37,415 INFO L87 Difference]: Start difference. First operand 1555 states and 5202 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:47:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:38,682 INFO L93 Difference]: Finished difference Result 2045 states and 6666 transitions. [2022-02-11 00:47:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:47:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:47:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:38,686 INFO L225 Difference]: With dead ends: 2045 [2022-02-11 00:47:38,686 INFO L226 Difference]: Without dead ends: 2038 [2022-02-11 00:47:38,687 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:47:38,687 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1338 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:38,687 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 198 Invalid, 3167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1799 Invalid, 0 Unknown, 1338 Unchecked, 0.7s Time] [2022-02-11 00:47:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2022-02-11 00:47:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1566. [2022-02-11 00:47:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3405750798722043) internal successors, (5228), 1565 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5228 transitions. [2022-02-11 00:47:38,709 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5228 transitions. Word has length 24 [2022-02-11 00:47:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:38,709 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5228 transitions. [2022-02-11 00:47:38,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:47:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5228 transitions. [2022-02-11 00:47:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:38,712 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:38,712 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:38,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-02-11 00:47:38,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:38,912 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1559600685, now seen corresponding path program 84 times [2022-02-11 00:47:38,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:38,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306921290] [2022-02-11 00:47:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:38,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:39,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:39,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306921290] [2022-02-11 00:47:39,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306921290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:39,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191494087] [2022-02-11 00:47:39,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:47:39,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:39,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:39,121 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:39,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-11 00:47:39,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:47:39,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:47:39,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:39,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:39,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:39,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:39,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:39,658 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-02-11 00:47:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:39,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:40,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:40,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:40,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:40,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:40,245 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 37 treesize of output 7 [2022-02-11 00:47:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:40,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191494087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:40,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:40,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:47:40,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499265626] [2022-02-11 00:47:40,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:40,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:47:40,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:40,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:47:40,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:47:40,285 INFO L87 Difference]: Start difference. First operand 1566 states and 5228 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:47:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:43,120 INFO L93 Difference]: Finished difference Result 2641 states and 8716 transitions. [2022-02-11 00:47:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-11 00:47:43,120 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-02-11 00:47:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:43,125 INFO L225 Difference]: With dead ends: 2641 [2022-02-11 00:47:43,125 INFO L226 Difference]: Without dead ends: 2637 [2022-02-11 00:47:43,125 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=877, Invalid=6779, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 00:47:43,125 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 224 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 721 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:43,125 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 145 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1187 Invalid, 0 Unknown, 721 Unchecked, 0.6s Time] [2022-02-11 00:47:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-02-11 00:47:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1591. [2022-02-11 00:47:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3276729559748426) internal successors, (5291), 1590 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5291 transitions. [2022-02-11 00:47:43,152 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5291 transitions. Word has length 24 [2022-02-11 00:47:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:43,152 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 5291 transitions. [2022-02-11 00:47:43,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:47:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5291 transitions. [2022-02-11 00:47:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:43,154 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:43,154 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:43,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-02-11 00:47:43,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:43,355 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:43,355 INFO L85 PathProgramCache]: Analyzing trace with hash 938415252, now seen corresponding path program 12 times [2022-02-11 00:47:43,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:43,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941770908] [2022-02-11 00:47:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:43,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:43,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:43,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941770908] [2022-02-11 00:47:43,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941770908] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:43,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929887473] [2022-02-11 00:47:43,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:47:43,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:43,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:43,585 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:43,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-11 00:47:43,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:47:43,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:43,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:47:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:44,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:44,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:44,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:44,125 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-02-11 00:47:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:44,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:44,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:44,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:44,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:44,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:44,721 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 37 treesize of output 7 [2022-02-11 00:47:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:44,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929887473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:44,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:44,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:47:44,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349493181] [2022-02-11 00:47:44,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:44,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:47:44,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:47:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:47:44,764 INFO L87 Difference]: Start difference. First operand 1591 states and 5291 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:47:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:48,975 INFO L93 Difference]: Finished difference Result 3196 states and 10645 transitions. [2022-02-11 00:47:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-11 00:47:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-02-11 00:47:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:48,981 INFO L225 Difference]: With dead ends: 3196 [2022-02-11 00:47:48,982 INFO L226 Difference]: Without dead ends: 3192 [2022-02-11 00:47:48,982 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3439 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1267, Invalid=9239, Unknown=0, NotChecked=0, Total=10506 [2022-02-11 00:47:48,982 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 311 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1606 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:48,982 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 155 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1517 Invalid, 0 Unknown, 1606 Unchecked, 0.7s Time] [2022-02-11 00:47:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2022-02-11 00:47:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 1614. [2022-02-11 00:47:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 3.3161810291382516) internal successors, (5349), 1613 states have internal predecessors, (5349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5349 transitions. [2022-02-11 00:47:49,011 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5349 transitions. Word has length 24 [2022-02-11 00:47:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:49,011 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 5349 transitions. [2022-02-11 00:47:49,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:47:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5349 transitions. [2022-02-11 00:47:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:49,014 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:49,014 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:49,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-02-11 00:47:49,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-02-11 00:47:49,230 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash 893357365, now seen corresponding path program 85 times [2022-02-11 00:47:49,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:49,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183992571] [2022-02-11 00:47:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:49,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:49,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183992571] [2022-02-11 00:47:49,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183992571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:49,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764138183] [2022-02-11 00:47:49,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:47:49,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:49,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:49,428 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:49,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-11 00:47:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:49,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:49,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:49,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:49,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:49,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:49,710 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 37 treesize of output 21 [2022-02-11 00:47:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:49,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:49,970 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:47:49,971 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 20 treesize of output 43 [2022-02-11 00:47:50,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:50,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:50,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:50,010 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 20 treesize of output 3 [2022-02-11 00:47:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:50,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764138183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:50,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:50,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:47:50,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431328464] [2022-02-11 00:47:50,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:50,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:47:50,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:50,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:47:50,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:47:50,025 INFO L87 Difference]: Start difference. First operand 1614 states and 5349 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:50,730 INFO L93 Difference]: Finished difference Result 2011 states and 6574 transitions. [2022-02-11 00:47:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:47:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:47:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:50,734 INFO L225 Difference]: With dead ends: 2011 [2022-02-11 00:47:50,734 INFO L226 Difference]: Without dead ends: 2005 [2022-02-11 00:47:50,735 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:47:50,735 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 140 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:50,735 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 132 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1036 Invalid, 0 Unknown, 858 Unchecked, 0.4s Time] [2022-02-11 00:47:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-02-11 00:47:50,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1605. [2022-02-11 00:47:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.321695760598504) internal successors, (5328), 1604 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5328 transitions. [2022-02-11 00:47:50,760 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5328 transitions. Word has length 24 [2022-02-11 00:47:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:50,760 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 5328 transitions. [2022-02-11 00:47:50,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5328 transitions. [2022-02-11 00:47:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:50,762 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:50,762 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:50,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:50,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-02-11 00:47:50,975 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash -761953865, now seen corresponding path program 86 times [2022-02-11 00:47:50,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:50,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458291899] [2022-02-11 00:47:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:50,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:51,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:51,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458291899] [2022-02-11 00:47:51,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458291899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:51,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844678859] [2022-02-11 00:47:51,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:51,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:51,174 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:51,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-11 00:47:51,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:51,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:47:51,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:51,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:51,492 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:47:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:51,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:52,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:52,120 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 41 treesize of output 56 [2022-02-11 00:47:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:52,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844678859] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:52,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:52,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:47:52,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753823556] [2022-02-11 00:47:52,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:52,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:47:52,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:52,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:47:52,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:47:52,224 INFO L87 Difference]: Start difference. First operand 1605 states and 5328 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:52,981 INFO L93 Difference]: Finished difference Result 3053 states and 10320 transitions. [2022-02-11 00:47:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:47:52,981 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:47:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:52,987 INFO L225 Difference]: With dead ends: 3053 [2022-02-11 00:47:52,987 INFO L226 Difference]: Without dead ends: 3044 [2022-02-11 00:47:52,987 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=1942, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:47:52,988 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 807 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:52,988 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 163 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 448 Invalid, 0 Unknown, 807 Unchecked, 0.2s Time] [2022-02-11 00:47:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-02-11 00:47:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 1643. [2022-02-11 00:47:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 3.302070645554202) internal successors, (5422), 1642 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5422 transitions. [2022-02-11 00:47:53,016 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5422 transitions. Word has length 24 [2022-02-11 00:47:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:53,016 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 5422 transitions. [2022-02-11 00:47:53,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5422 transitions. [2022-02-11 00:47:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:53,018 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:53,018 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:53,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-02-11 00:47:53,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-02-11 00:47:53,218 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash -958467370, now seen corresponding path program 13 times [2022-02-11 00:47:53,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:53,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638918542] [2022-02-11 00:47:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:53,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:53,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:53,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638918542] [2022-02-11 00:47:53,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638918542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:53,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660385760] [2022-02-11 00:47:53,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:47:53,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:53,425 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:53,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-11 00:47:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:53,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:53,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:53,710 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 33 treesize of output 17 [2022-02-11 00:47:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:53,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:53,969 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:47:53,969 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 20 treesize of output 43 [2022-02-11 00:47:54,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:54,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:54,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:54,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:54,008 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 20 treesize of output 3 [2022-02-11 00:47:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:54,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660385760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:54,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:54,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:47:54,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773610671] [2022-02-11 00:47:54,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:54,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:47:54,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:47:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:47:54,024 INFO L87 Difference]: Start difference. First operand 1643 states and 5422 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:54,815 INFO L93 Difference]: Finished difference Result 2100 states and 6811 transitions. [2022-02-11 00:47:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:47:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:47:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:54,820 INFO L225 Difference]: With dead ends: 2100 [2022-02-11 00:47:54,820 INFO L226 Difference]: Without dead ends: 2096 [2022-02-11 00:47:54,820 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:47:54,820 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 239 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 787 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:54,820 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 126 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1069 Invalid, 0 Unknown, 787 Unchecked, 0.4s Time] [2022-02-11 00:47:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2022-02-11 00:47:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1624. [2022-02-11 00:47:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.311152187307455) internal successors, (5374), 1623 states have internal predecessors, (5374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5374 transitions. [2022-02-11 00:47:54,843 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5374 transitions. Word has length 24 [2022-02-11 00:47:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:54,843 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 5374 transitions. [2022-02-11 00:47:54,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:47:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5374 transitions. [2022-02-11 00:47:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:47:54,846 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:54,846 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:54,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-02-11 00:47:55,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-11 00:47:55,046 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:47:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash -199377759, now seen corresponding path program 87 times [2022-02-11 00:47:55,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:55,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754961617] [2022-02-11 00:47:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:55,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:55,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:55,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754961617] [2022-02-11 00:47:55,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754961617] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:55,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629448678] [2022-02-11 00:47:55,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:47:55,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:55,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:55,271 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:47:55,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-11 00:47:55,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:47:55,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:55,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:55,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:55,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:55,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:55,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:55,616 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 35 treesize of output 47 [2022-02-11 00:47:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:55,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:56,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:56,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:56,184 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 45 treesize of output 7 [2022-02-11 00:47:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:56,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629448678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:56,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:56,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:47:56,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878860594] [2022-02-11 00:47:56,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:56,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:47:56,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:56,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:47:56,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:47:56,213 INFO L87 Difference]: Start difference. First operand 1624 states and 5374 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:59,977 INFO L93 Difference]: Finished difference Result 2836 states and 9082 transitions. [2022-02-11 00:47:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-11 00:47:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:47:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:59,982 INFO L225 Difference]: With dead ends: 2836 [2022-02-11 00:47:59,983 INFO L226 Difference]: Without dead ends: 2804 [2022-02-11 00:47:59,983 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=862, Invalid=7510, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 00:47:59,983 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 564 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1582 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:59,983 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 175 Invalid, 4140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2308 Invalid, 0 Unknown, 1582 Unchecked, 1.1s Time] [2022-02-11 00:47:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-02-11 00:48:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1642. [2022-02-11 00:48:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.3132236441194394) internal successors, (5437), 1641 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5437 transitions. [2022-02-11 00:48:00,009 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5437 transitions. Word has length 24 [2022-02-11 00:48:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:00,009 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 5437 transitions. [2022-02-11 00:48:00,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5437 transitions. [2022-02-11 00:48:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:00,011 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:00,011 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:00,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-02-11 00:48:00,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-11 00:48:00,212 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:00,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1736865753, now seen corresponding path program 88 times [2022-02-11 00:48:00,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:00,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369481375] [2022-02-11 00:48:00,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:00,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:00,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:00,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369481375] [2022-02-11 00:48:00,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369481375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:00,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000837903] [2022-02-11 00:48:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:48:00,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:00,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:00,444 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:00,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-11 00:48:00,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:48:00,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:00,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:00,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:00,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:00,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:00,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:48:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:00,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:00,984 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:00,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:48:01,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:01,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:01,027 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 20 treesize of output 3 [2022-02-11 00:48:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:01,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000837903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:01,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:01,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:01,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126009846] [2022-02-11 00:48:01,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:01,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:01,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:01,042 INFO L87 Difference]: Start difference. First operand 1642 states and 5437 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:02,280 INFO L93 Difference]: Finished difference Result 2119 states and 7012 transitions. [2022-02-11 00:48:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:48:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:48:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:02,284 INFO L225 Difference]: With dead ends: 2119 [2022-02-11 00:48:02,284 INFO L226 Difference]: Without dead ends: 2112 [2022-02-11 00:48:02,284 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=2074, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:48:02,285 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:02,285 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 154 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1532 Invalid, 0 Unknown, 637 Unchecked, 0.6s Time] [2022-02-11 00:48:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-02-11 00:48:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1642. [2022-02-11 00:48:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.3132236441194394) internal successors, (5437), 1641 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5437 transitions. [2022-02-11 00:48:02,309 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5437 transitions. Word has length 24 [2022-02-11 00:48:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:02,309 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 5437 transitions. [2022-02-11 00:48:02,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5437 transitions. [2022-02-11 00:48:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:02,311 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:02,311 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:02,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-02-11 00:48:02,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-02-11 00:48:02,512 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1459870753, now seen corresponding path program 89 times [2022-02-11 00:48:02,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:02,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115766474] [2022-02-11 00:48:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:02,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:02,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:02,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115766474] [2022-02-11 00:48:02,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115766474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:02,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607594323] [2022-02-11 00:48:02,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:48:02,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:02,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:02,744 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:02,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-11 00:48:02,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:48:02,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:02,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:02,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:03,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:03,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:03,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:03,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2022-02-11 00:48:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:03,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:03,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:03,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:03,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:03,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:03,787 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 37 treesize of output 7 [2022-02-11 00:48:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:03,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607594323] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:03,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:03,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:48:03,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701311169] [2022-02-11 00:48:03,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:03,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:48:03,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:03,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:48:03,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:48:03,826 INFO L87 Difference]: Start difference. First operand 1642 states and 5437 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:04,611 INFO L93 Difference]: Finished difference Result 2348 states and 7751 transitions. [2022-02-11 00:48:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:48:04,611 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:04,615 INFO L225 Difference]: With dead ends: 2348 [2022-02-11 00:48:04,615 INFO L226 Difference]: Without dead ends: 2341 [2022-02-11 00:48:04,616 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:48:04,616 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 813 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:04,616 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 127 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 616 Invalid, 0 Unknown, 813 Unchecked, 0.2s Time] [2022-02-11 00:48:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-02-11 00:48:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 1653. [2022-02-11 00:48:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.305084745762712) internal successors, (5460), 1652 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5460 transitions. [2022-02-11 00:48:04,638 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5460 transitions. Word has length 24 [2022-02-11 00:48:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:04,639 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 5460 transitions. [2022-02-11 00:48:04,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5460 transitions. [2022-02-11 00:48:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:04,641 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:04,641 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:04,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:04,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-02-11 00:48:04,857 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:04,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:04,857 INFO L85 PathProgramCache]: Analyzing trace with hash 988875043, now seen corresponding path program 90 times [2022-02-11 00:48:04,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:04,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436785965] [2022-02-11 00:48:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:04,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:05,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:05,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436785965] [2022-02-11 00:48:05,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436785965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:05,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156001725] [2022-02-11 00:48:05,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:48:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:05,089 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:05,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-11 00:48:05,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:48:05,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:05,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:05,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:05,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:05,334 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:48:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:05,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:05,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:05,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:05,888 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 37 treesize of output 54 [2022-02-11 00:48:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:06,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156001725] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:06,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:06,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:48:06,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615228536] [2022-02-11 00:48:06,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:06,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:48:06,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:06,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:48:06,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:48:06,022 INFO L87 Difference]: Start difference. First operand 1653 states and 5460 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:07,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:07,173 INFO L93 Difference]: Finished difference Result 1924 states and 6308 transitions. [2022-02-11 00:48:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:48:07,173 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:07,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:07,177 INFO L225 Difference]: With dead ends: 1924 [2022-02-11 00:48:07,177 INFO L226 Difference]: Without dead ends: 1918 [2022-02-11 00:48:07,177 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:48:07,177 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:07,177 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 116 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1553 Invalid, 0 Unknown, 262 Unchecked, 0.6s Time] [2022-02-11 00:48:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-02-11 00:48:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1654. [2022-02-11 00:48:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.3042952208106473) internal successors, (5462), 1653 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5462 transitions. [2022-02-11 00:48:07,198 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5462 transitions. Word has length 24 [2022-02-11 00:48:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:07,198 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 5462 transitions. [2022-02-11 00:48:07,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5462 transitions. [2022-02-11 00:48:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:07,201 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:07,201 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:07,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-02-11 00:48:07,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-02-11 00:48:07,401 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash 626132313, now seen corresponding path program 91 times [2022-02-11 00:48:07,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:07,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317932912] [2022-02-11 00:48:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:07,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:07,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:07,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317932912] [2022-02-11 00:48:07,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317932912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:07,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282152521] [2022-02-11 00:48:07,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:48:07,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:07,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:07,639 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:07,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-11 00:48:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:07,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:07,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:07,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:07,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:07,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:07,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:07,858 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 30 treesize of output 16 [2022-02-11 00:48:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:07,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:08,156 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:08,157 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 20 treesize of output 43 [2022-02-11 00:48:08,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:08,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:08,203 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 20 treesize of output 3 [2022-02-11 00:48:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:08,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282152521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:08,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:08,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:08,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701007729] [2022-02-11 00:48:08,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:08,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:08,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:08,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:08,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:08,219 INFO L87 Difference]: Start difference. First operand 1654 states and 5462 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:48:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:09,222 INFO L93 Difference]: Finished difference Result 1970 states and 6486 transitions. [2022-02-11 00:48:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:48:09,222 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:48:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:09,226 INFO L225 Difference]: With dead ends: 1970 [2022-02-11 00:48:09,226 INFO L226 Difference]: Without dead ends: 1966 [2022-02-11 00:48:09,226 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:48:09,226 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:09,226 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 94 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1418 Invalid, 0 Unknown, 196 Unchecked, 0.5s Time] [2022-02-11 00:48:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-02-11 00:48:09,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1662. [2022-02-11 00:48:09,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.299819385912101) internal successors, (5481), 1661 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5481 transitions. [2022-02-11 00:48:09,250 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5481 transitions. Word has length 24 [2022-02-11 00:48:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:09,250 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 5481 transitions. [2022-02-11 00:48:09,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:48:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5481 transitions. [2022-02-11 00:48:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:09,253 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:09,253 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:09,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-02-11 00:48:09,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:09,453 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1513635994, now seen corresponding path program 14 times [2022-02-11 00:48:09,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:09,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57553545] [2022-02-11 00:48:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:09,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:09,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:09,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57553545] [2022-02-11 00:48:09,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57553545] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:09,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066663037] [2022-02-11 00:48:09,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:48:09,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:09,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:09,722 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:09,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-11 00:48:09,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:48:09,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:09,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:09,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:09,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:09,987 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-02-11 00:48:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:10,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:10,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:10,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:10,651 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 38 treesize of output 55 [2022-02-11 00:48:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:10,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066663037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:10,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:10,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:48:10,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853881847] [2022-02-11 00:48:10,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:10,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:48:10,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:10,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:48:10,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:48:10,766 INFO L87 Difference]: Start difference. First operand 1662 states and 5481 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:48:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:12,331 INFO L93 Difference]: Finished difference Result 1974 states and 6440 transitions. [2022-02-11 00:48:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:48:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 [2022-02-11 00:48:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:12,335 INFO L225 Difference]: With dead ends: 1974 [2022-02-11 00:48:12,335 INFO L226 Difference]: Without dead ends: 1960 [2022-02-11 00:48:12,335 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:48:12,335 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:12,335 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 129 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2035 Invalid, 0 Unknown, 416 Unchecked, 0.8s Time] [2022-02-11 00:48:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2022-02-11 00:48:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1657. [2022-02-11 00:48:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.301328502415459) internal successors, (5467), 1656 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5467 transitions. [2022-02-11 00:48:12,356 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5467 transitions. Word has length 24 [2022-02-11 00:48:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:12,356 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 5467 transitions. [2022-02-11 00:48:12,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:48:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5467 transitions. [2022-02-11 00:48:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:12,358 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:12,358 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:12,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-11 00:48:12,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:12,559 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:12,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1320486233, now seen corresponding path program 92 times [2022-02-11 00:48:12,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:12,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53049982] [2022-02-11 00:48:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:12,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:12,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:12,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53049982] [2022-02-11 00:48:12,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53049982] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:12,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810868146] [2022-02-11 00:48:12,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:48:12,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:12,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:12,754 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:12,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-11 00:48:12,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:48:12,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:12,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:13,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:13,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:13,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:13,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:48:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:13,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:13,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:13,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:13,667 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 37 treesize of output 56 [2022-02-11 00:48:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:13,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810868146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:13,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:13,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-02-11 00:48:13,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746386578] [2022-02-11 00:48:13,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:13,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:48:13,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:48:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:48:13,741 INFO L87 Difference]: Start difference. First operand 1657 states and 5467 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:15,712 INFO L93 Difference]: Finished difference Result 2230 states and 7183 transitions. [2022-02-11 00:48:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:48:15,712 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:15,716 INFO L225 Difference]: With dead ends: 2230 [2022-02-11 00:48:15,716 INFO L226 Difference]: Without dead ends: 2226 [2022-02-11 00:48:15,717 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=5099, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:48:15,717 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 262 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1149 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:15,717 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 231 Invalid, 3086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1862 Invalid, 0 Unknown, 1149 Unchecked, 0.8s Time] [2022-02-11 00:48:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-02-11 00:48:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1705. [2022-02-11 00:48:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.2822769953051645) internal successors, (5593), 1704 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5593 transitions. [2022-02-11 00:48:15,740 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5593 transitions. Word has length 24 [2022-02-11 00:48:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:15,740 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 5593 transitions. [2022-02-11 00:48:15,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5593 transitions. [2022-02-11 00:48:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:15,742 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:15,742 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:15,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-02-11 00:48:15,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:15,943 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:15,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1710035489, now seen corresponding path program 93 times [2022-02-11 00:48:15,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:15,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552751803] [2022-02-11 00:48:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:15,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:16,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:16,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552751803] [2022-02-11 00:48:16,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552751803] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:16,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68569405] [2022-02-11 00:48:16,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:48:16,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:16,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:16,140 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:16,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-11 00:48:16,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:48:16,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:16,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:16,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:16,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:16,434 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 37 treesize of output 21 [2022-02-11 00:48:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:16,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:16,709 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:16,709 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 20 treesize of output 43 [2022-02-11 00:48:16,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:16,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:16,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:16,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:16,750 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 20 treesize of output 3 [2022-02-11 00:48:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:16,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68569405] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:16,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:16,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:48:16,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193587656] [2022-02-11 00:48:16,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:16,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:48:16,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:48:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:48:16,766 INFO L87 Difference]: Start difference. First operand 1705 states and 5593 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:48:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:17,818 INFO L93 Difference]: Finished difference Result 2122 states and 6832 transitions. [2022-02-11 00:48:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:48:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:48:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:17,822 INFO L225 Difference]: With dead ends: 2122 [2022-02-11 00:48:17,822 INFO L226 Difference]: Without dead ends: 2115 [2022-02-11 00:48:17,823 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:48:17,823 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 731 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:17,823 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 169 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1657 Invalid, 0 Unknown, 731 Unchecked, 0.6s Time] [2022-02-11 00:48:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2022-02-11 00:48:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1722. [2022-02-11 00:48:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 3.2783265543288787) internal successors, (5642), 1721 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 5642 transitions. [2022-02-11 00:48:17,846 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 5642 transitions. Word has length 24 [2022-02-11 00:48:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:17,846 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 5642 transitions. [2022-02-11 00:48:17,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:48:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 5642 transitions. [2022-02-11 00:48:17,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:17,848 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:17,848 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:17,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-02-11 00:48:18,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:18,049 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash -131973757, now seen corresponding path program 94 times [2022-02-11 00:48:18,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:18,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446416918] [2022-02-11 00:48:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:18,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:18,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:18,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446416918] [2022-02-11 00:48:18,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446416918] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:18,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521104282] [2022-02-11 00:48:18,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:48:18,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:18,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:18,249 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:18,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-11 00:48:18,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:48:18,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:18,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:18,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:18,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:18,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:18,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:18,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:18,532 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 33 treesize of output 17 [2022-02-11 00:48:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:18,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:18,795 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:18,795 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 20 treesize of output 43 [2022-02-11 00:48:18,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:18,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:18,846 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:48:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:18,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521104282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:18,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:18,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:18,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832149977] [2022-02-11 00:48:18,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:18,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:18,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:18,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:18,862 INFO L87 Difference]: Start difference. First operand 1722 states and 5642 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:19,578 INFO L93 Difference]: Finished difference Result 2155 states and 7039 transitions. [2022-02-11 00:48:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:48:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:48:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:19,582 INFO L225 Difference]: With dead ends: 2155 [2022-02-11 00:48:19,582 INFO L226 Difference]: Without dead ends: 2149 [2022-02-11 00:48:19,582 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:48:19,582 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 187 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1184 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:19,582 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 129 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1085 Invalid, 0 Unknown, 1184 Unchecked, 0.4s Time] [2022-02-11 00:48:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2022-02-11 00:48:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1710. [2022-02-11 00:48:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.2826214160327676) internal successors, (5610), 1709 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5610 transitions. [2022-02-11 00:48:19,605 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5610 transitions. Word has length 24 [2022-02-11 00:48:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:19,605 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 5610 transitions. [2022-02-11 00:48:19,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5610 transitions. [2022-02-11 00:48:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:19,607 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:19,607 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:19,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-02-11 00:48:19,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-02-11 00:48:19,808 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1017772037, now seen corresponding path program 95 times [2022-02-11 00:48:19,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:19,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278586060] [2022-02-11 00:48:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:19,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:20,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:20,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278586060] [2022-02-11 00:48:20,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278586060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:20,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745199696] [2022-02-11 00:48:20,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:48:20,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:20,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:20,030 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:20,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-11 00:48:20,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:48:20,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:20,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:20,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:20,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:20,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:20,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:20,324 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 33 treesize of output 17 [2022-02-11 00:48:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:20,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:20,579 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:20,579 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 20 treesize of output 43 [2022-02-11 00:48:20,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:20,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:20,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:20,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:20,632 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 20 treesize of output 3 [2022-02-11 00:48:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:20,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745199696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:20,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:20,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:20,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036395392] [2022-02-11 00:48:20,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:20,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:20,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:20,648 INFO L87 Difference]: Start difference. First operand 1710 states and 5610 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:21,371 INFO L93 Difference]: Finished difference Result 2050 states and 6701 transitions. [2022-02-11 00:48:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:48:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:48:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:21,375 INFO L225 Difference]: With dead ends: 2050 [2022-02-11 00:48:21,375 INFO L226 Difference]: Without dead ends: 2043 [2022-02-11 00:48:21,376 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:48:21,376 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:21,376 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 127 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1090 Invalid, 0 Unknown, 295 Unchecked, 0.4s Time] [2022-02-11 00:48:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-02-11 00:48:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1730. [2022-02-11 00:48:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.282244071717756) internal successors, (5675), 1729 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5675 transitions. [2022-02-11 00:48:21,398 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5675 transitions. Word has length 24 [2022-02-11 00:48:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:21,398 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5675 transitions. [2022-02-11 00:48:21,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:21,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5675 transitions. [2022-02-11 00:48:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:21,400 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:21,400 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:21,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-02-11 00:48:21,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:21,601 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1621884029, now seen corresponding path program 96 times [2022-02-11 00:48:21,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:21,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155669307] [2022-02-11 00:48:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:21,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:21,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:21,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155669307] [2022-02-11 00:48:21,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155669307] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:21,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565912589] [2022-02-11 00:48:21,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:48:21,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:21,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:21,807 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:21,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-11 00:48:21,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:48:21,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:21,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:48:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:22,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:22,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:22,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:22,334 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-02-11 00:48:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:22,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:23,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:23,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:23,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:23,174 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 37 treesize of output 7 [2022-02-11 00:48:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:23,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565912589] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:23,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:23,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:48:23,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889587441] [2022-02-11 00:48:23,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:23,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:48:23,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:23,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:48:23,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:48:23,215 INFO L87 Difference]: Start difference. First operand 1730 states and 5675 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:24,892 INFO L93 Difference]: Finished difference Result 2441 states and 7966 transitions. [2022-02-11 00:48:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:48:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:24,896 INFO L225 Difference]: With dead ends: 2441 [2022-02-11 00:48:24,896 INFO L226 Difference]: Without dead ends: 2432 [2022-02-11 00:48:24,896 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:48:24,897 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 268 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1732 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:24,897 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 159 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 503 Invalid, 0 Unknown, 1732 Unchecked, 0.2s Time] [2022-02-11 00:48:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-02-11 00:48:24,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1815. [2022-02-11 00:48:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 3.2662624035281147) internal successors, (5925), 1814 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 5925 transitions. [2022-02-11 00:48:24,923 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 5925 transitions. Word has length 24 [2022-02-11 00:48:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:24,923 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 5925 transitions. [2022-02-11 00:48:24,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 5925 transitions. [2022-02-11 00:48:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:24,925 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:24,925 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:24,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-11 00:48:25,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-11 00:48:25,135 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2008343658, now seen corresponding path program 15 times [2022-02-11 00:48:25,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:25,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123483862] [2022-02-11 00:48:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:25,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:25,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:25,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123483862] [2022-02-11 00:48:25,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123483862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:25,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028330616] [2022-02-11 00:48:25,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:48:25,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:25,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:25,368 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:25,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-11 00:48:25,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:48:25,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:25,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:25,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:25,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:25,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:25,807 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 29 treesize of output 17 [2022-02-11 00:48:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:25,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:26,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:26,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:26,193 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 37 treesize of output 56 [2022-02-11 00:48:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:26,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028330616] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:26,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:26,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:48:26,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383693169] [2022-02-11 00:48:26,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:26,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:48:26,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:48:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:48:26,283 INFO L87 Difference]: Start difference. First operand 1815 states and 5925 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:48:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:28,694 INFO L93 Difference]: Finished difference Result 2571 states and 8240 transitions. [2022-02-11 00:48:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:48:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:48:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:28,699 INFO L225 Difference]: With dead ends: 2571 [2022-02-11 00:48:28,699 INFO L226 Difference]: Without dead ends: 2561 [2022-02-11 00:48:28,700 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=531, Invalid=5321, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:48:28,700 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 233 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 951 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:28,700 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 263 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1847 Invalid, 0 Unknown, 951 Unchecked, 0.7s Time] [2022-02-11 00:48:28,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2022-02-11 00:48:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1846. [2022-02-11 00:48:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.2531165311653116) internal successors, (6002), 1845 states have internal predecessors, (6002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6002 transitions. [2022-02-11 00:48:28,740 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6002 transitions. Word has length 24 [2022-02-11 00:48:28,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:28,741 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 6002 transitions. [2022-02-11 00:48:28,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:48:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6002 transitions. [2022-02-11 00:48:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:28,743 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:28,743 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:28,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-02-11 00:48:28,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-11 00:48:28,944 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1008952667, now seen corresponding path program 97 times [2022-02-11 00:48:28,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:28,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774556173] [2022-02-11 00:48:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:28,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:29,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:29,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774556173] [2022-02-11 00:48:29,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774556173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:29,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91058076] [2022-02-11 00:48:29,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:48:29,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:29,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:29,147 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:29,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-11 00:48:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:29,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:29,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:29,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:29,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:29,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:29,424 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 37 treesize of output 21 [2022-02-11 00:48:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:29,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:29,679 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:29,679 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 20 treesize of output 43 [2022-02-11 00:48:29,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:29,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:29,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:29,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:29,729 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 20 treesize of output 3 [2022-02-11 00:48:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:29,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91058076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:29,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:29,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:29,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508269548] [2022-02-11 00:48:29,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:29,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:29,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:29,745 INFO L87 Difference]: Start difference. First operand 1846 states and 6002 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:30,391 INFO L93 Difference]: Finished difference Result 2249 states and 7227 transitions. [2022-02-11 00:48:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:48:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:48:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:30,395 INFO L225 Difference]: With dead ends: 2249 [2022-02-11 00:48:30,395 INFO L226 Difference]: Without dead ends: 2242 [2022-02-11 00:48:30,396 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:48:30,396 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 139 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:30,396 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 98 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 855 Invalid, 0 Unknown, 365 Unchecked, 0.3s Time] [2022-02-11 00:48:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-02-11 00:48:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1858. [2022-02-11 00:48:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.253096392030156) internal successors, (6041), 1857 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6041 transitions. [2022-02-11 00:48:30,427 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6041 transitions. Word has length 24 [2022-02-11 00:48:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:30,428 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6041 transitions. [2022-02-11 00:48:30,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6041 transitions. [2022-02-11 00:48:30,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:30,430 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:30,430 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:30,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-02-11 00:48:30,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:30,631 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:30,631 INFO L85 PathProgramCache]: Analyzing trace with hash -3739865, now seen corresponding path program 98 times [2022-02-11 00:48:30,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:30,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11779540] [2022-02-11 00:48:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:30,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:30,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:30,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11779540] [2022-02-11 00:48:30,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11779540] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:30,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245479639] [2022-02-11 00:48:30,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:48:30,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:30,855 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:30,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-11 00:48:30,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:48:30,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:30,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:31,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:31,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:31,174 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:48:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:31,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:31,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:31,797 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 41 treesize of output 56 [2022-02-11 00:48:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:31,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245479639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:31,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:31,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:48:31,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470086735] [2022-02-11 00:48:31,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:31,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:48:31,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:48:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:48:31,917 INFO L87 Difference]: Start difference. First operand 1858 states and 6041 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:33,561 INFO L93 Difference]: Finished difference Result 2943 states and 9800 transitions. [2022-02-11 00:48:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:48:33,561 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:33,567 INFO L225 Difference]: With dead ends: 2943 [2022-02-11 00:48:33,567 INFO L226 Difference]: Without dead ends: 2933 [2022-02-11 00:48:33,568 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=456, Invalid=2850, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:48:33,568 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 144 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:33,568 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 183 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 535 Invalid, 0 Unknown, 1166 Unchecked, 0.2s Time] [2022-02-11 00:48:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-02-11 00:48:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1873. [2022-02-11 00:48:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 3.2542735042735043) internal successors, (6092), 1872 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6092 transitions. [2022-02-11 00:48:33,597 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6092 transitions. Word has length 24 [2022-02-11 00:48:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:33,597 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 6092 transitions. [2022-02-11 00:48:33,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6092 transitions. [2022-02-11 00:48:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:33,600 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:33,600 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:33,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-02-11 00:48:33,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-02-11 00:48:33,800 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:33,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1310540155, now seen corresponding path program 99 times [2022-02-11 00:48:33,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:33,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366150167] [2022-02-11 00:48:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:34,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:34,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366150167] [2022-02-11 00:48:34,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366150167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:34,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168756980] [2022-02-11 00:48:34,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:48:34,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:34,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:34,059 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:34,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-11 00:48:34,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:48:34,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:34,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:34,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:34,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:34,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:34,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:34,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:34,399 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 33 treesize of output 21 [2022-02-11 00:48:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:34,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:34,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:34,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:34,787 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 37 treesize of output 54 [2022-02-11 00:48:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:34,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168756980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:34,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:34,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:48:34,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696528161] [2022-02-11 00:48:34,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:34,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:48:34,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:34,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:48:34,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:48:34,926 INFO L87 Difference]: Start difference. First operand 1873 states and 6092 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:36,058 INFO L93 Difference]: Finished difference Result 2232 states and 7157 transitions. [2022-02-11 00:48:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:48:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:36,062 INFO L225 Difference]: With dead ends: 2232 [2022-02-11 00:48:36,062 INFO L226 Difference]: Without dead ends: 2226 [2022-02-11 00:48:36,062 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:48:36,062 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 115 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 689 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:36,062 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 148 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1310 Invalid, 0 Unknown, 689 Unchecked, 0.5s Time] [2022-02-11 00:48:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-02-11 00:48:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1877. [2022-02-11 00:48:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.2510660980810235) internal successors, (6099), 1876 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 6099 transitions. [2022-02-11 00:48:36,086 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 6099 transitions. Word has length 24 [2022-02-11 00:48:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:36,086 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 6099 transitions. [2022-02-11 00:48:36,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 6099 transitions. [2022-02-11 00:48:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:36,088 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:36,088 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:36,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:36,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:36,289 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:36,289 INFO L85 PathProgramCache]: Analyzing trace with hash 230032295, now seen corresponding path program 100 times [2022-02-11 00:48:36,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:36,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247519452] [2022-02-11 00:48:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:36,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:36,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247519452] [2022-02-11 00:48:36,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247519452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:36,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754062984] [2022-02-11 00:48:36,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:48:36,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:36,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:36,511 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:36,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-11 00:48:36,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:48:36,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:36,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:36,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:36,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:36,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:36,758 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 33 treesize of output 17 [2022-02-11 00:48:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:36,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:37,060 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:37,060 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 20 treesize of output 43 [2022-02-11 00:48:37,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:37,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:37,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:48:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:37,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754062984] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:37,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:37,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:37,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154287696] [2022-02-11 00:48:37,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:37,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:37,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:37,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:37,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:37,116 INFO L87 Difference]: Start difference. First operand 1877 states and 6099 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:38,191 INFO L93 Difference]: Finished difference Result 2214 states and 7180 transitions. [2022-02-11 00:48:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:48:38,191 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:38,195 INFO L225 Difference]: With dead ends: 2214 [2022-02-11 00:48:38,195 INFO L226 Difference]: Without dead ends: 2204 [2022-02-11 00:48:38,195 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:48:38,196 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:38,196 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 65 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1304 Invalid, 0 Unknown, 654 Unchecked, 0.5s Time] [2022-02-11 00:48:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-02-11 00:48:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1893. [2022-02-11 00:48:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.2510570824524314) internal successors, (6151), 1892 states have internal predecessors, (6151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6151 transitions. [2022-02-11 00:48:38,220 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6151 transitions. Word has length 24 [2022-02-11 00:48:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:38,220 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 6151 transitions. [2022-02-11 00:48:38,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6151 transitions. [2022-02-11 00:48:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:38,222 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:38,222 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:38,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-02-11 00:48:38,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:38,423 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:38,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:38,423 INFO L85 PathProgramCache]: Analyzing trace with hash 715549660, now seen corresponding path program 6 times [2022-02-11 00:48:38,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:38,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021869205] [2022-02-11 00:48:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:38,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:38,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:38,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021869205] [2022-02-11 00:48:38,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021869205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:38,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477284745] [2022-02-11 00:48:38,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:48:38,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:38,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:38,644 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:38,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-11 00:48:38,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:48:38,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:48:38,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:39,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:39,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:39,175 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-02-11 00:48:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:39,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:39,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:39,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:39,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:39,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:39,999 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 37 treesize of output 7 [2022-02-11 00:48:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:40,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477284745] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:40,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:40,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:48:40,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121265240] [2022-02-11 00:48:40,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:40,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:48:40,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:40,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:48:40,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:48:40,039 INFO L87 Difference]: Start difference. First operand 1893 states and 6151 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:40,722 INFO L93 Difference]: Finished difference Result 2227 states and 7098 transitions. [2022-02-11 00:48:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:48:40,722 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:40,726 INFO L225 Difference]: With dead ends: 2227 [2022-02-11 00:48:40,726 INFO L226 Difference]: Without dead ends: 2225 [2022-02-11 00:48:40,726 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=333, Invalid=1923, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:48:40,726 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:40,726 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 129 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 524 Unchecked, 0.1s Time] [2022-02-11 00:48:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2022-02-11 00:48:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1964. [2022-02-11 00:48:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.247580234335201) internal successors, (6375), 1963 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 6375 transitions. [2022-02-11 00:48:40,753 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 6375 transitions. Word has length 24 [2022-02-11 00:48:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:40,754 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 6375 transitions. [2022-02-11 00:48:40,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 6375 transitions. [2022-02-11 00:48:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:40,756 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:40,756 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:40,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-02-11 00:48:40,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:40,971 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:40,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1105807064, now seen corresponding path program 7 times [2022-02-11 00:48:40,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:40,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910908059] [2022-02-11 00:48:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:40,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:41,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:41,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910908059] [2022-02-11 00:48:41,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910908059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:41,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391657463] [2022-02-11 00:48:41,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:48:41,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:41,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:41,179 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:41,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-11 00:48:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:41,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:41,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:41,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:41,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:41,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:41,457 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 37 treesize of output 21 [2022-02-11 00:48:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:41,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:41,716 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:41,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:48:41,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:41,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:41,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:41,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:41,757 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 20 treesize of output 3 [2022-02-11 00:48:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:41,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391657463] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:41,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:41,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:41,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705959030] [2022-02-11 00:48:41,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:41,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:41,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:41,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:41,773 INFO L87 Difference]: Start difference. First operand 1964 states and 6375 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:42,579 INFO L93 Difference]: Finished difference Result 2382 states and 7597 transitions. [2022-02-11 00:48:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:48:42,579 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:42,584 INFO L225 Difference]: With dead ends: 2382 [2022-02-11 00:48:42,584 INFO L226 Difference]: Without dead ends: 2377 [2022-02-11 00:48:42,584 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:48:42,584 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:42,584 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 162 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1288 Invalid, 0 Unknown, 290 Unchecked, 0.5s Time] [2022-02-11 00:48:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-02-11 00:48:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1965. [2022-02-11 00:48:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 3.24847250509165) internal successors, (6380), 1964 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 6380 transitions. [2022-02-11 00:48:42,610 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 6380 transitions. Word has length 24 [2022-02-11 00:48:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:42,610 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 6380 transitions. [2022-02-11 00:48:42,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 6380 transitions. [2022-02-11 00:48:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:42,612 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:42,612 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:42,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:42,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:42,813 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:42,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1091904803, now seen corresponding path program 1 times [2022-02-11 00:48:42,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:42,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185617329] [2022-02-11 00:48:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:42,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:43,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:43,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185617329] [2022-02-11 00:48:43,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185617329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:43,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677813598] [2022-02-11 00:48:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:43,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:43,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:43,014 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:43,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-11 00:48:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:43,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:43,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:43,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:43,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:43,295 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 37 treesize of output 21 [2022-02-11 00:48:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:43,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:43,554 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:43,555 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:48:43,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:43,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:43,595 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 20 treesize of output 3 [2022-02-11 00:48:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:43,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677813598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:43,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:43,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:43,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206170554] [2022-02-11 00:48:43,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:43,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:43,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:43,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:43,610 INFO L87 Difference]: Start difference. First operand 1965 states and 6380 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:44,434 INFO L93 Difference]: Finished difference Result 2285 states and 7368 transitions. [2022-02-11 00:48:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:48:44,434 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:48:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:44,438 INFO L225 Difference]: With dead ends: 2285 [2022-02-11 00:48:44,438 INFO L226 Difference]: Without dead ends: 2281 [2022-02-11 00:48:44,439 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:48:44,439 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:44,439 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 162 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 925 Invalid, 0 Unknown, 272 Unchecked, 0.3s Time] [2022-02-11 00:48:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2022-02-11 00:48:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1963. [2022-02-11 00:48:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.2487257900101936) internal successors, (6374), 1962 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6374 transitions. [2022-02-11 00:48:44,463 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6374 transitions. Word has length 24 [2022-02-11 00:48:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:44,463 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 6374 transitions. [2022-02-11 00:48:44,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6374 transitions. [2022-02-11 00:48:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:44,465 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:44,466 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:44,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:44,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:44,666 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -297142872, now seen corresponding path program 8 times [2022-02-11 00:48:44,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:44,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991126528] [2022-02-11 00:48:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:44,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:44,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991126528] [2022-02-11 00:48:44,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991126528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:44,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90884916] [2022-02-11 00:48:44,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:48:44,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:44,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:44,887 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:44,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-11 00:48:44,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:48:44,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:44,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:44,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:45,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:45,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:45,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:45,208 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:48:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:45,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:45,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:45,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:45,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:45,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-02-11 00:48:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:45,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90884916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:45,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:45,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:48:45,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688369227] [2022-02-11 00:48:45,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:45,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:48:45,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:45,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:48:45,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:48:45,945 INFO L87 Difference]: Start difference. First operand 1963 states and 6374 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:48,123 INFO L93 Difference]: Finished difference Result 3351 states and 11150 transitions. [2022-02-11 00:48:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:48:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:48,130 INFO L225 Difference]: With dead ends: 3351 [2022-02-11 00:48:48,130 INFO L226 Difference]: Without dead ends: 3341 [2022-02-11 00:48:48,130 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=576, Invalid=3456, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:48:48,130 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 179 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1809 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:48,130 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 314 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1027 Invalid, 0 Unknown, 1809 Unchecked, 0.4s Time] [2022-02-11 00:48:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2022-02-11 00:48:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2001. [2022-02-11 00:48:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 3.249) internal successors, (6498), 2000 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 6498 transitions. [2022-02-11 00:48:48,167 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 6498 transitions. Word has length 24 [2022-02-11 00:48:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:48,167 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 6498 transitions. [2022-02-11 00:48:48,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 6498 transitions. [2022-02-11 00:48:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:48,170 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:48,170 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:48,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-02-11 00:48:48,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:48,371 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2104597335, now seen corresponding path program 2 times [2022-02-11 00:48:48,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:48,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038782832] [2022-02-11 00:48:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:48,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:48,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038782832] [2022-02-11 00:48:48,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038782832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:48,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301791685] [2022-02-11 00:48:48,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:48:48,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:48,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:48,610 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:48,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-11 00:48:48,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:48:48,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:48,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:48,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:48,930 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:48:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:49,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:49,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:49,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:49,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:49,561 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 41 treesize of output 56 [2022-02-11 00:48:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:49,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301791685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:49,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:49,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:48:49,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531688141] [2022-02-11 00:48:49,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:49,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:48:49,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:48:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:48:49,672 INFO L87 Difference]: Start difference. First operand 2001 states and 6498 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:50,731 INFO L93 Difference]: Finished difference Result 2462 states and 8050 transitions. [2022-02-11 00:48:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:48:50,732 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:50,745 INFO L225 Difference]: With dead ends: 2462 [2022-02-11 00:48:50,745 INFO L226 Difference]: Without dead ends: 2454 [2022-02-11 00:48:50,745 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:48:50,746 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:50,746 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 176 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 582 Invalid, 0 Unknown, 743 Unchecked, 0.2s Time] [2022-02-11 00:48:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-02-11 00:48:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2003. [2022-02-11 00:48:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.247752247752248) internal successors, (6502), 2002 states have internal predecessors, (6502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6502 transitions. [2022-02-11 00:48:50,772 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6502 transitions. Word has length 24 [2022-02-11 00:48:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:50,772 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 6502 transitions. [2022-02-11 00:48:50,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6502 transitions. [2022-02-11 00:48:50,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:50,775 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:50,775 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:50,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-02-11 00:48:50,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-11 00:48:50,976 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1017137148, now seen corresponding path program 9 times [2022-02-11 00:48:50,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:50,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591347647] [2022-02-11 00:48:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:50,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:51,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:51,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591347647] [2022-02-11 00:48:51,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591347647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:51,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285998477] [2022-02-11 00:48:51,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:48:51,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:51,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:51,196 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:51,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-11 00:48:51,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:48:51,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:51,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:51,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:51,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:51,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:51,535 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 29 treesize of output 17 [2022-02-11 00:48:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:51,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:51,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:51,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:51,924 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 37 treesize of output 54 [2022-02-11 00:48:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:52,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285998477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:52,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:52,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:48:52,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054802377] [2022-02-11 00:48:52,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:52,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:48:52,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:48:52,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:48:52,034 INFO L87 Difference]: Start difference. First operand 2003 states and 6502 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:52,893 INFO L93 Difference]: Finished difference Result 2324 states and 7479 transitions. [2022-02-11 00:48:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:48:52,894 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:48:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:52,898 INFO L225 Difference]: With dead ends: 2324 [2022-02-11 00:48:52,898 INFO L226 Difference]: Without dead ends: 2319 [2022-02-11 00:48:52,898 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:48:52,898 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 96 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:52,898 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 141 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1354 Invalid, 0 Unknown, 821 Unchecked, 0.5s Time] [2022-02-11 00:48:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-02-11 00:48:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2002. [2022-02-11 00:48:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.2478760619690155) internal successors, (6499), 2001 states have internal predecessors, (6499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6499 transitions. [2022-02-11 00:48:52,924 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6499 transitions. Word has length 24 [2022-02-11 00:48:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:52,924 INFO L470 AbstractCegarLoop]: Abstraction has 2002 states and 6499 transitions. [2022-02-11 00:48:52,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6499 transitions. [2022-02-11 00:48:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:52,926 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:52,926 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:52,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:53,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-11 00:48:53,127 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:53,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:53,127 INFO L85 PathProgramCache]: Analyzing trace with hash -516236142, now seen corresponding path program 16 times [2022-02-11 00:48:53,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:53,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716998173] [2022-02-11 00:48:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:53,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:53,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716998173] [2022-02-11 00:48:53,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716998173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:53,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686937072] [2022-02-11 00:48:53,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:48:53,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:53,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:53,333 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:53,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-11 00:48:53,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:48:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:53,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:53,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:53,613 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 33 treesize of output 17 [2022-02-11 00:48:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:53,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:53,867 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:53,867 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 20 treesize of output 43 [2022-02-11 00:48:53,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:53,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:53,905 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 20 treesize of output 3 [2022-02-11 00:48:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:53,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686937072] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:53,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:53,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:53,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755062843] [2022-02-11 00:48:53,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:53,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:53,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:53,920 INFO L87 Difference]: Start difference. First operand 2002 states and 6499 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:54,766 INFO L93 Difference]: Finished difference Result 2438 states and 7772 transitions. [2022-02-11 00:48:54,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:48:54,767 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:48:54,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:54,771 INFO L225 Difference]: With dead ends: 2438 [2022-02-11 00:48:54,771 INFO L226 Difference]: Without dead ends: 2433 [2022-02-11 00:48:54,771 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:48:54,771 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:54,771 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 158 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1180 Invalid, 0 Unknown, 375 Unchecked, 0.4s Time] [2022-02-11 00:48:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2022-02-11 00:48:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2003. [2022-02-11 00:48:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.2472527472527473) internal successors, (6501), 2002 states have internal predecessors, (6501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6501 transitions. [2022-02-11 00:48:54,796 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6501 transitions. Word has length 24 [2022-02-11 00:48:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:54,796 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 6501 transitions. [2022-02-11 00:48:54,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6501 transitions. [2022-02-11 00:48:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:54,798 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:54,798 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:54,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-02-11 00:48:54,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-11 00:48:54,999 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:54,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:54,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1528928674, now seen corresponding path program 17 times [2022-02-11 00:48:54,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:54,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024945001] [2022-02-11 00:48:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:54,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:55,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:55,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024945001] [2022-02-11 00:48:55,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024945001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:55,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316892600] [2022-02-11 00:48:55,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:48:55,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:55,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:55,220 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:55,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-11 00:48:55,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:48:55,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:55,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:55,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:55,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:55,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:55,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:55,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:55,503 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 37 treesize of output 21 [2022-02-11 00:48:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:55,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:55,773 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:48:55,774 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 20 treesize of output 43 [2022-02-11 00:48:55,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:55,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:55,826 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 20 treesize of output 3 [2022-02-11 00:48:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:55,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316892600] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:55,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:55,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:48:55,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118199907] [2022-02-11 00:48:55,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:55,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:48:55,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:48:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:48:55,841 INFO L87 Difference]: Start difference. First operand 2003 states and 6501 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:56,984 INFO L93 Difference]: Finished difference Result 2506 states and 8053 transitions. [2022-02-11 00:48:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:48:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:48:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:56,989 INFO L225 Difference]: With dead ends: 2506 [2022-02-11 00:48:56,989 INFO L226 Difference]: Without dead ends: 2499 [2022-02-11 00:48:56,989 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:48:56,990 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 195 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:56,990 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 161 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1502 Invalid, 0 Unknown, 778 Unchecked, 0.6s Time] [2022-02-11 00:48:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-02-11 00:48:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1997. [2022-02-11 00:48:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 3.2600200400801604) internal successors, (6507), 1996 states have internal predecessors, (6507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 6507 transitions. [2022-02-11 00:48:57,016 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 6507 transitions. Word has length 24 [2022-02-11 00:48:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:57,016 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 6507 transitions. [2022-02-11 00:48:57,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:48:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 6507 transitions. [2022-02-11 00:48:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:48:57,019 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:57,019 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:57,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-02-11 00:48:57,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:57,219 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:48:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash -387153423, now seen corresponding path program 3 times [2022-02-11 00:48:57,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:57,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029721207] [2022-02-11 00:48:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:57,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:57,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:57,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029721207] [2022-02-11 00:48:57,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029721207] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:57,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168629605] [2022-02-11 00:48:57,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:48:57,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:57,431 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:48:57,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-11 00:48:57,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:48:57,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:57,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:48:57,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:57,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:57,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:57,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:57,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:57,930 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 29 treesize of output 17 [2022-02-11 00:48:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:57,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:58,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:58,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:58,309 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 37 treesize of output 56 [2022-02-11 00:48:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:58,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168629605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:58,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:58,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:48:58,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084554718] [2022-02-11 00:48:58,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:58,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:48:58,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:58,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:48:58,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:48:58,468 INFO L87 Difference]: Start difference. First operand 1997 states and 6507 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:00,953 INFO L93 Difference]: Finished difference Result 2682 states and 8625 transitions. [2022-02-11 00:49:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 00:49:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:00,959 INFO L225 Difference]: With dead ends: 2682 [2022-02-11 00:49:00,959 INFO L226 Difference]: Without dead ends: 2673 [2022-02-11 00:49:00,960 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=541, Invalid=5939, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 00:49:00,960 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:00,960 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 235 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1633 Invalid, 0 Unknown, 732 Unchecked, 0.7s Time] [2022-02-11 00:49:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-02-11 00:49:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2019. [2022-02-11 00:49:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 3.2547076313181367) internal successors, (6568), 2018 states have internal predecessors, (6568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 6568 transitions. [2022-02-11 00:49:00,988 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 6568 transitions. Word has length 24 [2022-02-11 00:49:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:00,988 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 6568 transitions. [2022-02-11 00:49:00,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 6568 transitions. [2022-02-11 00:49:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:00,991 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:00,991 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:01,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-02-11 00:49:01,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:01,192 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:01,192 INFO L85 PathProgramCache]: Analyzing trace with hash 856297860, now seen corresponding path program 10 times [2022-02-11 00:49:01,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:01,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24503720] [2022-02-11 00:49:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:01,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:01,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:01,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24503720] [2022-02-11 00:49:01,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24503720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:01,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439517314] [2022-02-11 00:49:01,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:49:01,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:01,406 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:01,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-11 00:49:01,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:49:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:01,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:01,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:01,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:01,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:01,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:01,692 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 33 treesize of output 17 [2022-02-11 00:49:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:01,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:01,953 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:01,953 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 20 treesize of output 43 [2022-02-11 00:49:02,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:02,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:02,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:02,003 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 20 treesize of output 3 [2022-02-11 00:49:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:02,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439517314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:02,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:02,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:49:02,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11579205] [2022-02-11 00:49:02,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:02,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:49:02,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:49:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:49:02,019 INFO L87 Difference]: Start difference. First operand 2019 states and 6568 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:49:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:02,778 INFO L93 Difference]: Finished difference Result 2425 states and 7756 transitions. [2022-02-11 00:49:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:49:02,778 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:49:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:02,782 INFO L225 Difference]: With dead ends: 2425 [2022-02-11 00:49:02,782 INFO L226 Difference]: Without dead ends: 2420 [2022-02-11 00:49:02,783 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:49:02,783 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:02,783 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 113 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1036 Invalid, 0 Unknown, 303 Unchecked, 0.4s Time] [2022-02-11 00:49:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-02-11 00:49:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2020. [2022-02-11 00:49:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.254581475978207) internal successors, (6571), 2019 states have internal predecessors, (6571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6571 transitions. [2022-02-11 00:49:02,817 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6571 transitions. Word has length 24 [2022-02-11 00:49:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:02,817 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 6571 transitions. [2022-02-11 00:49:02,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:49:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6571 transitions. [2022-02-11 00:49:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:02,819 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:02,819 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:02,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-02-11 00:49:03,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-02-11 00:49:03,020 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash -799013370, now seen corresponding path program 11 times [2022-02-11 00:49:03,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:03,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208916613] [2022-02-11 00:49:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:03,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:03,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208916613] [2022-02-11 00:49:03,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208916613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:03,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165606037] [2022-02-11 00:49:03,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:49:03,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:03,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:03,224 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:03,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-11 00:49:03,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:49:03,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:03,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:03,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:03,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:03,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:03,519 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 33 treesize of output 17 [2022-02-11 00:49:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:03,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:03,778 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:03,778 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 20 treesize of output 43 [2022-02-11 00:49:03,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:03,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:03,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:03,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:03,828 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 20 treesize of output 3 [2022-02-11 00:49:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:03,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165606037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:03,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:03,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:49:03,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999940174] [2022-02-11 00:49:03,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:03,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:49:03,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:49:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:49:03,843 INFO L87 Difference]: Start difference. First operand 2020 states and 6571 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:49:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:04,727 INFO L93 Difference]: Finished difference Result 2712 states and 8738 transitions. [2022-02-11 00:49:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:49:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:49:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:04,732 INFO L225 Difference]: With dead ends: 2712 [2022-02-11 00:49:04,732 INFO L226 Difference]: Without dead ends: 2705 [2022-02-11 00:49:04,732 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:49:04,739 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:04,739 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 214 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1170 Invalid, 0 Unknown, 558 Unchecked, 0.5s Time] [2022-02-11 00:49:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-02-11 00:49:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2027. [2022-02-11 00:49:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.25715695952616) internal successors, (6599), 2026 states have internal predecessors, (6599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6599 transitions. [2022-02-11 00:49:04,768 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6599 transitions. Word has length 24 [2022-02-11 00:49:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:04,768 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 6599 transitions. [2022-02-11 00:49:04,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:49:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6599 transitions. [2022-02-11 00:49:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:04,771 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:04,771 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:04,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-02-11 00:49:04,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:04,986 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1411944732, now seen corresponding path program 12 times [2022-02-11 00:49:04,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:04,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863284838] [2022-02-11 00:49:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:04,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:05,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:05,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863284838] [2022-02-11 00:49:05,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863284838] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:05,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54084133] [2022-02-11 00:49:05,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:49:05,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:05,186 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:05,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-11 00:49:05,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:49:05,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:05,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:49:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:05,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:05,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:05,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:05,717 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-02-11 00:49:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:05,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:06,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:06,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:06,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:06,558 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 37 treesize of output 7 [2022-02-11 00:49:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:06,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54084133] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:06,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:06,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:49:06,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077038793] [2022-02-11 00:49:06,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:06,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:49:06,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:06,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:49:06,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:49:06,598 INFO L87 Difference]: Start difference. First operand 2027 states and 6599 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:07,651 INFO L93 Difference]: Finished difference Result 2393 states and 7634 transitions. [2022-02-11 00:49:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:49:07,652 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:07,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:07,656 INFO L225 Difference]: With dead ends: 2393 [2022-02-11 00:49:07,656 INFO L226 Difference]: Without dead ends: 2389 [2022-02-11 00:49:07,656 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=463, Invalid=2843, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:49:07,656 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:07,656 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 169 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 355 Invalid, 0 Unknown, 924 Unchecked, 0.1s Time] [2022-02-11 00:49:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-02-11 00:49:07,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2070. [2022-02-11 00:49:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 3.252779120347994) internal successors, (6730), 2069 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 6730 transitions. [2022-02-11 00:49:07,681 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 6730 transitions. Word has length 24 [2022-02-11 00:49:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:07,681 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 6730 transitions. [2022-02-11 00:49:07,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 6730 transitions. [2022-02-11 00:49:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:07,684 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:07,685 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:07,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-02-11 00:49:07,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:07,885 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1021687328, now seen corresponding path program 13 times [2022-02-11 00:49:07,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:07,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199314453] [2022-02-11 00:49:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:08,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:08,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199314453] [2022-02-11 00:49:08,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199314453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:08,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840031969] [2022-02-11 00:49:08,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:08,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:08,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:08,093 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:08,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-11 00:49:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:08,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:08,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:08,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:08,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:08,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:08,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:08,378 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 37 treesize of output 21 [2022-02-11 00:49:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:08,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:08,648 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:08,649 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 20 treesize of output 43 [2022-02-11 00:49:08,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:08,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:08,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:08,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:08,688 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 20 treesize of output 3 [2022-02-11 00:49:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:08,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840031969] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:08,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:08,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:49:08,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549192882] [2022-02-11 00:49:08,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:08,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:49:08,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:49:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:49:08,703 INFO L87 Difference]: Start difference. First operand 2070 states and 6730 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:09,452 INFO L93 Difference]: Finished difference Result 2491 states and 8001 transitions. [2022-02-11 00:49:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:49:09,452 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:09,456 INFO L225 Difference]: With dead ends: 2491 [2022-02-11 00:49:09,456 INFO L226 Difference]: Without dead ends: 2485 [2022-02-11 00:49:09,456 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:49:09,456 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 142 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:09,457 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 122 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1072 Invalid, 0 Unknown, 629 Unchecked, 0.4s Time] [2022-02-11 00:49:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2022-02-11 00:49:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2064. [2022-02-11 00:49:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.256907416383907) internal successors, (6719), 2063 states have internal predecessors, (6719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 6719 transitions. [2022-02-11 00:49:09,485 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 6719 transitions. Word has length 24 [2022-02-11 00:49:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:09,486 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 6719 transitions. [2022-02-11 00:49:09,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 6719 transitions. [2022-02-11 00:49:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:09,489 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:09,489 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:09,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:09,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-02-11 00:49:09,704 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1722611165, now seen corresponding path program 101 times [2022-02-11 00:49:09,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:09,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81351571] [2022-02-11 00:49:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:09,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:09,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81351571] [2022-02-11 00:49:09,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81351571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:09,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550367025] [2022-02-11 00:49:09,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:49:09,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:09,924 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:09,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-11 00:49:09,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:49:09,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:09,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:10,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:10,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:10,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:10,173 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 33 treesize of output 17 [2022-02-11 00:49:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:10,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:10,474 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:10,475 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 20 treesize of output 43 [2022-02-11 00:49:10,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:10,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:10,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:10,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:10,527 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 20 treesize of output 3 [2022-02-11 00:49:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:10,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550367025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:10,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:10,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:49:10,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816151544] [2022-02-11 00:49:10,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:10,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:49:10,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:49:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:49:10,542 INFO L87 Difference]: Start difference. First operand 2064 states and 6719 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:11,507 INFO L93 Difference]: Finished difference Result 2348 states and 7639 transitions. [2022-02-11 00:49:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:49:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:11,512 INFO L225 Difference]: With dead ends: 2348 [2022-02-11 00:49:11,512 INFO L226 Difference]: Without dead ends: 2342 [2022-02-11 00:49:11,512 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:49:11,512 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 91 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:11,512 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 65 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1081 Invalid, 0 Unknown, 266 Unchecked, 0.4s Time] [2022-02-11 00:49:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-02-11 00:49:11,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2062. [2022-02-11 00:49:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.2581271227559436) internal successors, (6715), 2061 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6715 transitions. [2022-02-11 00:49:11,538 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6715 transitions. Word has length 24 [2022-02-11 00:49:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:11,538 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 6715 transitions. [2022-02-11 00:49:11,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6715 transitions. [2022-02-11 00:49:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:11,541 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:11,541 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:11,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-02-11 00:49:11,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:11,741 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:11,741 INFO L85 PathProgramCache]: Analyzing trace with hash 775404772, now seen corresponding path program 14 times [2022-02-11 00:49:11,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:11,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286529775] [2022-02-11 00:49:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:11,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:11,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:11,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286529775] [2022-02-11 00:49:11,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286529775] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:11,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661703464] [2022-02-11 00:49:11,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:49:11,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:11,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:11,959 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:11,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-11 00:49:11,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:49:11,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:49:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:12,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:12,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:12,238 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:49:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:12,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:12,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:12,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:12,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:12,921 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 41 treesize of output 56 [2022-02-11 00:49:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:13,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661703464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:13,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:13,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:49:13,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820032824] [2022-02-11 00:49:13,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:13,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:49:13,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:49:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:49:13,040 INFO L87 Difference]: Start difference. First operand 2062 states and 6715 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:49:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:15,814 INFO L93 Difference]: Finished difference Result 3248 states and 10717 transitions. [2022-02-11 00:49:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:49:15,815 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 [2022-02-11 00:49:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:15,821 INFO L225 Difference]: With dead ends: 3248 [2022-02-11 00:49:15,821 INFO L226 Difference]: Without dead ends: 3235 [2022-02-11 00:49:15,821 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:49:15,821 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 219 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1698 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:15,822 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 176 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1252 Invalid, 0 Unknown, 1698 Unchecked, 0.5s Time] [2022-02-11 00:49:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2022-02-11 00:49:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 2107. [2022-02-11 00:49:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 3.268281101614435) internal successors, (6883), 2106 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 6883 transitions. [2022-02-11 00:49:15,854 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 6883 transitions. Word has length 24 [2022-02-11 00:49:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:15,854 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 6883 transitions. [2022-02-11 00:49:15,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:49:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 6883 transitions. [2022-02-11 00:49:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:15,857 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:15,857 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:15,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-02-11 00:49:16,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-02-11 00:49:16,058 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:16,058 INFO L85 PathProgramCache]: Analyzing trace with hash -725136200, now seen corresponding path program 15 times [2022-02-11 00:49:16,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:16,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750337594] [2022-02-11 00:49:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:16,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:16,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:16,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750337594] [2022-02-11 00:49:16,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750337594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:16,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314762617] [2022-02-11 00:49:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:49:16,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:16,282 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:16,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-11 00:49:16,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:49:16,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:16,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:49:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:16,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:16,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:16,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:16,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:16,575 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:49:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:16,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:17,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:17,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:17,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:17,186 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 41 treesize of output 56 [2022-02-11 00:49:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:17,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314762617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:17,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:17,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:49:17,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203755180] [2022-02-11 00:49:17,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:17,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:49:17,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:49:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:49:17,336 INFO L87 Difference]: Start difference. First operand 2107 states and 6883 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-02-11 00:49:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:19,602 INFO L93 Difference]: Finished difference Result 3163 states and 10622 transitions. [2022-02-11 00:49:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:49:19,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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 [2022-02-11 00:49:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:19,609 INFO L225 Difference]: With dead ends: 3163 [2022-02-11 00:49:19,609 INFO L226 Difference]: Without dead ends: 3151 [2022-02-11 00:49:19,609 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=435, Invalid=3471, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:49:19,609 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1237 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:19,610 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 86 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 949 Invalid, 0 Unknown, 1237 Unchecked, 0.4s Time] [2022-02-11 00:49:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2022-02-11 00:49:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2179. [2022-02-11 00:49:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 3.2823691460055096) internal successors, (7149), 2178 states have internal predecessors, (7149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:19,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 7149 transitions. [2022-02-11 00:49:19,644 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 7149 transitions. Word has length 24 [2022-02-11 00:49:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:19,644 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 7149 transitions. [2022-02-11 00:49:19,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-02-11 00:49:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 7149 transitions. [2022-02-11 00:49:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:19,647 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:19,647 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:19,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-02-11 00:49:19,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-02-11 00:49:19,848 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:19,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1789169850, now seen corresponding path program 18 times [2022-02-11 00:49:19,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:19,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033748380] [2022-02-11 00:49:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:20,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:20,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033748380] [2022-02-11 00:49:20,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033748380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:20,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424867760] [2022-02-11 00:49:20,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:49:20,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:20,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:20,054 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:20,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-11 00:49:20,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:49:20,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:20,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:49:20,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:20,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:20,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:20,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:20,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:20,530 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 35 treesize of output 21 [2022-02-11 00:49:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:20,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:21,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:21,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:21,097 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 41 treesize of output 60 [2022-02-11 00:49:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:21,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424867760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:21,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:21,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:49:21,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973903058] [2022-02-11 00:49:21,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:21,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:49:21,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:21,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:49:21,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:49:21,192 INFO L87 Difference]: Start difference. First operand 2179 states and 7149 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:22,690 INFO L93 Difference]: Finished difference Result 2816 states and 8947 transitions. [2022-02-11 00:49:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:49:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:22,696 INFO L225 Difference]: With dead ends: 2816 [2022-02-11 00:49:22,696 INFO L226 Difference]: Without dead ends: 2810 [2022-02-11 00:49:22,696 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=287, Invalid=2469, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:49:22,697 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1681 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:22,697 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 216 Invalid, 3237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1547 Invalid, 0 Unknown, 1681 Unchecked, 0.6s Time] [2022-02-11 00:49:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2022-02-11 00:49:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 2155. [2022-02-11 00:49:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 3.288300835654596) internal successors, (7083), 2154 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 7083 transitions. [2022-02-11 00:49:22,730 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 7083 transitions. Word has length 24 [2022-02-11 00:49:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:22,730 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 7083 transitions. [2022-02-11 00:49:22,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 7083 transitions. [2022-02-11 00:49:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:22,733 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:22,733 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:22,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-02-11 00:49:22,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:22,933 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:22,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:22,934 INFO L85 PathProgramCache]: Analyzing trace with hash 319872101, now seen corresponding path program 102 times [2022-02-11 00:49:22,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:22,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522820741] [2022-02-11 00:49:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:22,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:23,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:23,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522820741] [2022-02-11 00:49:23,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522820741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:23,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580059760] [2022-02-11 00:49:23,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:49:23,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:23,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:23,182 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:23,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-11 00:49:23,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:49:23,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:49:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:23,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:23,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:23,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:23,470 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:49:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:23,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:24,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:24,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:24,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:24,173 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 41 treesize of output 56 [2022-02-11 00:49:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:24,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580059760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:24,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:24,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:49:24,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899408636] [2022-02-11 00:49:24,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:24,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:49:24,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:24,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:49:24,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:49:24,293 INFO L87 Difference]: Start difference. First operand 2155 states and 7083 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:49:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:26,527 INFO L93 Difference]: Finished difference Result 3178 states and 10559 transitions. [2022-02-11 00:49:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:49:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 [2022-02-11 00:49:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:26,534 INFO L225 Difference]: With dead ends: 3178 [2022-02-11 00:49:26,534 INFO L226 Difference]: Without dead ends: 3163 [2022-02-11 00:49:26,534 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=391, Invalid=3031, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:49:26,534 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 147 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1328 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:26,534 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 233 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1195 Invalid, 0 Unknown, 1328 Unchecked, 0.5s Time] [2022-02-11 00:49:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2022-02-11 00:49:26,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 2173. [2022-02-11 00:49:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.2905156537753224) internal successors, (7147), 2172 states have internal predecessors, (7147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7147 transitions. [2022-02-11 00:49:26,567 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7147 transitions. Word has length 24 [2022-02-11 00:49:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:26,567 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 7147 transitions. [2022-02-11 00:49:26,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:49:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7147 transitions. [2022-02-11 00:49:26,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:26,570 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:26,570 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:26,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-02-11 00:49:26,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:26,770 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:26,771 INFO L85 PathProgramCache]: Analyzing trace with hash 448954820, now seen corresponding path program 16 times [2022-02-11 00:49:26,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:26,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557705278] [2022-02-11 00:49:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:26,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:27,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:27,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557705278] [2022-02-11 00:49:27,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557705278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:27,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651512744] [2022-02-11 00:49:27,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:49:27,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:27,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:27,004 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:27,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-11 00:49:27,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:49:27,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:27,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:27,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:27,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:27,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:27,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:49:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:27,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:27,574 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:27,574 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 20 treesize of output 43 [2022-02-11 00:49:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:27,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:27,634 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 20 treesize of output 3 [2022-02-11 00:49:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:27,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651512744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:27,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:27,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:49:27,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959702497] [2022-02-11 00:49:27,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:27,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:49:27,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:27,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:49:27,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:49:27,649 INFO L87 Difference]: Start difference. First operand 2173 states and 7147 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:28,767 INFO L93 Difference]: Finished difference Result 2465 states and 8079 transitions. [2022-02-11 00:49:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:49:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:28,772 INFO L225 Difference]: With dead ends: 2465 [2022-02-11 00:49:28,772 INFO L226 Difference]: Without dead ends: 2458 [2022-02-11 00:49:28,772 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:49:28,772 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 99 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:28,772 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 83 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1349 Invalid, 0 Unknown, 193 Unchecked, 0.5s Time] [2022-02-11 00:49:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-02-11 00:49:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2167. [2022-02-11 00:49:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.2899353647276084) internal successors, (7126), 2166 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7126 transitions. [2022-02-11 00:49:28,802 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7126 transitions. Word has length 24 [2022-02-11 00:49:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:28,802 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 7126 transitions. [2022-02-11 00:49:28,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7126 transitions. [2022-02-11 00:49:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:28,805 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:28,805 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:28,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-02-11 00:49:29,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:29,007 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1299422423, now seen corresponding path program 103 times [2022-02-11 00:49:29,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:29,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751406066] [2022-02-11 00:49:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:29,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:29,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:29,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751406066] [2022-02-11 00:49:29,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751406066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:29,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761930412] [2022-02-11 00:49:29,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:29,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:29,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:29,241 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:29,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-11 00:49:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:29,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:29,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:29,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:29,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:49:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:29,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:29,813 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:29,814 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 20 treesize of output 43 [2022-02-11 00:49:29,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:29,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:29,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:29,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:29,861 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 20 treesize of output 3 [2022-02-11 00:49:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:29,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761930412] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:29,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:29,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:49:29,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459312869] [2022-02-11 00:49:29,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:29,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:49:29,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:49:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:49:29,878 INFO L87 Difference]: Start difference. First operand 2167 states and 7126 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:31,028 INFO L93 Difference]: Finished difference Result 2554 states and 8369 transitions. [2022-02-11 00:49:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:49:31,028 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:31,033 INFO L225 Difference]: With dead ends: 2554 [2022-02-11 00:49:31,033 INFO L226 Difference]: Without dead ends: 2544 [2022-02-11 00:49:31,033 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:49:31,033 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 138 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 708 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:31,033 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 69 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1284 Invalid, 0 Unknown, 708 Unchecked, 0.5s Time] [2022-02-11 00:49:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-02-11 00:49:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2169. [2022-02-11 00:49:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 3.2896678966789668) internal successors, (7132), 2168 states have internal predecessors, (7132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 7132 transitions. [2022-02-11 00:49:31,066 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 7132 transitions. Word has length 24 [2022-02-11 00:49:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:31,066 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 7132 transitions. [2022-02-11 00:49:31,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 7132 transitions. [2022-02-11 00:49:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:31,069 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:31,070 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:31,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:31,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-02-11 00:49:31,275 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash -999955525, now seen corresponding path program 104 times [2022-02-11 00:49:31,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:31,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824368815] [2022-02-11 00:49:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:31,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:31,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:31,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824368815] [2022-02-11 00:49:31,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824368815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:31,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740054713] [2022-02-11 00:49:31,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:49:31,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:31,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:31,538 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:31,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-11 00:49:31,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:49:31,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:49:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:31,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:31,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:31,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:31,827 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:49:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:32,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:32,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:32,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:32,547 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 41 treesize of output 56 [2022-02-11 00:49:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:32,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740054713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:32,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:32,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:49:32,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119528475] [2022-02-11 00:49:32,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:32,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:49:32,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:49:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:49:32,696 INFO L87 Difference]: Start difference. First operand 2169 states and 7132 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:49:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:36,874 INFO L93 Difference]: Finished difference Result 3653 states and 12342 transitions. [2022-02-11 00:49:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:49:36,874 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 [2022-02-11 00:49:36,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:36,882 INFO L225 Difference]: With dead ends: 3653 [2022-02-11 00:49:36,882 INFO L226 Difference]: Without dead ends: 3646 [2022-02-11 00:49:36,882 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=660, Invalid=5346, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 00:49:36,883 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 205 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1365 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:36,883 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 189 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1088 Invalid, 0 Unknown, 1365 Unchecked, 0.5s Time] [2022-02-11 00:49:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2022-02-11 00:49:36,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 2188. [2022-02-11 00:49:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 3.3017832647462275) internal successors, (7221), 2187 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 7221 transitions. [2022-02-11 00:49:36,925 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 7221 transitions. Word has length 24 [2022-02-11 00:49:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:36,925 INFO L470 AbstractCegarLoop]: Abstraction has 2188 states and 7221 transitions. [2022-02-11 00:49:36,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:49:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 7221 transitions. [2022-02-11 00:49:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:36,928 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:36,928 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:36,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-02-11 00:49:37,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:37,129 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash 925650051, now seen corresponding path program 105 times [2022-02-11 00:49:37,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:37,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296058075] [2022-02-11 00:49:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:37,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:37,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:37,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296058075] [2022-02-11 00:49:37,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296058075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:37,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037218566] [2022-02-11 00:49:37,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:49:37,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:37,365 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:37,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-11 00:49:37,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:49:37,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:37,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:49:37,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:37,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:37,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:37,679 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 33 treesize of output 21 [2022-02-11 00:49:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:37,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:38,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:38,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:38,085 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 37 treesize of output 56 [2022-02-11 00:49:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:38,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037218566] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:38,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:38,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:49:38,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292124678] [2022-02-11 00:49:38,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:38,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:49:38,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:49:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:49:38,162 INFO L87 Difference]: Start difference. First operand 2188 states and 7221 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:39,947 INFO L93 Difference]: Finished difference Result 2585 states and 8416 transitions. [2022-02-11 00:49:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:49:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:39,952 INFO L225 Difference]: With dead ends: 2585 [2022-02-11 00:49:39,952 INFO L226 Difference]: Without dead ends: 2579 [2022-02-11 00:49:39,952 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=383, Invalid=3399, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:49:39,953 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 150 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:39,953 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 121 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1336 Invalid, 0 Unknown, 635 Unchecked, 0.6s Time] [2022-02-11 00:49:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2022-02-11 00:49:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 2194. [2022-02-11 00:49:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 3.3046055631554947) internal successors, (7247), 2193 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 7247 transitions. [2022-02-11 00:49:39,982 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 7247 transitions. Word has length 24 [2022-02-11 00:49:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:39,982 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 7247 transitions. [2022-02-11 00:49:39,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 7247 transitions. [2022-02-11 00:49:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:39,985 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:39,985 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:40,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-02-11 00:49:40,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:40,186 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2054445773, now seen corresponding path program 106 times [2022-02-11 00:49:40,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:40,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665824447] [2022-02-11 00:49:40,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:40,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:40,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:40,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665824447] [2022-02-11 00:49:40,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665824447] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:40,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144789675] [2022-02-11 00:49:40,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:49:40,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:40,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:40,384 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:40,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-11 00:49:40,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:49:40,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:40,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:40,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:40,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:40,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-11 00:49:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:40,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:40,968 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:40,968 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 20 treesize of output 43 [2022-02-11 00:49:41,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:41,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:41,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:49:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:41,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144789675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:41,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:41,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:49:41,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794952162] [2022-02-11 00:49:41,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:41,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:49:41,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:49:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:49:41,025 INFO L87 Difference]: Start difference. First operand 2194 states and 7247 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:49:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:42,193 INFO L93 Difference]: Finished difference Result 2561 states and 8346 transitions. [2022-02-11 00:49:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:49:42,193 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:49:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:42,198 INFO L225 Difference]: With dead ends: 2561 [2022-02-11 00:49:42,198 INFO L226 Difference]: Without dead ends: 2554 [2022-02-11 00:49:42,199 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:49:42,199 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 132 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:42,199 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 157 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1740 Invalid, 0 Unknown, 225 Unchecked, 0.6s Time] [2022-02-11 00:49:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-02-11 00:49:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2200. [2022-02-11 00:49:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.3024101864483857) internal successors, (7262), 2199 states have internal predecessors, (7262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7262 transitions. [2022-02-11 00:49:42,228 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7262 transitions. Word has length 24 [2022-02-11 00:49:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:42,228 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7262 transitions. [2022-02-11 00:49:42,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:49:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7262 transitions. [2022-02-11 00:49:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:42,231 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:42,231 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:42,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-02-11 00:49:42,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2022-02-11 00:49:42,431 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash 976075949, now seen corresponding path program 107 times [2022-02-11 00:49:42,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:42,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971677414] [2022-02-11 00:49:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:42,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:42,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:42,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971677414] [2022-02-11 00:49:42,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971677414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:42,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814543955] [2022-02-11 00:49:42,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:49:42,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:42,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:42,630 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:42,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-11 00:49:42,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:49:42,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:42,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:42,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:42,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:42,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:42,926 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 33 treesize of output 17 [2022-02-11 00:49:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:42,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:43,212 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:43,212 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 20 treesize of output 43 [2022-02-11 00:49:43,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:43,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:43,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:43,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:43,258 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 20 treesize of output 3 [2022-02-11 00:49:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:43,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814543955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:43,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:43,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:49:43,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364198289] [2022-02-11 00:49:43,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:43,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:49:43,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:49:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:49:43,274 INFO L87 Difference]: Start difference. First operand 2200 states and 7262 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:49:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:44,481 INFO L93 Difference]: Finished difference Result 2566 states and 8345 transitions. [2022-02-11 00:49:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:49:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:49:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:44,486 INFO L225 Difference]: With dead ends: 2566 [2022-02-11 00:49:44,486 INFO L226 Difference]: Without dead ends: 2564 [2022-02-11 00:49:44,486 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:49:44,487 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:44,487 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 159 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1745 Invalid, 0 Unknown, 331 Unchecked, 0.6s Time] [2022-02-11 00:49:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-02-11 00:49:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2200. [2022-02-11 00:49:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.3024101864483857) internal successors, (7262), 2199 states have internal predecessors, (7262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7262 transitions. [2022-02-11 00:49:44,516 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7262 transitions. Word has length 24 [2022-02-11 00:49:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:44,516 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7262 transitions. [2022-02-11 00:49:44,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:49:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7262 transitions. [2022-02-11 00:49:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:44,519 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:44,519 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:44,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-02-11 00:49:44,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:44,719 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:44,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:44,719 INFO L85 PathProgramCache]: Analyzing trace with hash -679235281, now seen corresponding path program 108 times [2022-02-11 00:49:44,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:44,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658562246] [2022-02-11 00:49:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:44,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:44,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:44,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658562246] [2022-02-11 00:49:44,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658562246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:44,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765546632] [2022-02-11 00:49:44,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:49:44,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:44,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:44,925 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:44,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-11 00:49:44,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:49:44,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:44,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:49:44,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:45,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:45,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:45,449 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-02-11 00:49:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:45,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:46,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:46,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:46,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:46,016 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 37 treesize of output 7 [2022-02-11 00:49:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:46,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765546632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:46,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:46,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:49:46,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863920228] [2022-02-11 00:49:46,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:46,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:49:46,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:49:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:49:46,055 INFO L87 Difference]: Start difference. First operand 2200 states and 7262 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:49:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:49,843 INFO L93 Difference]: Finished difference Result 3532 states and 11623 transitions. [2022-02-11 00:49:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-11 00:49:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-02-11 00:49:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:49,850 INFO L225 Difference]: With dead ends: 3532 [2022-02-11 00:49:49,850 INFO L226 Difference]: Without dead ends: 3521 [2022-02-11 00:49:49,851 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3901 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1258, Invalid=10298, Unknown=0, NotChecked=0, Total=11556 [2022-02-11 00:49:49,851 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 442 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1069 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:49,851 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 175 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1711 Invalid, 0 Unknown, 1069 Unchecked, 0.8s Time] [2022-02-11 00:49:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-02-11 00:49:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2256. [2022-02-11 00:49:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.2829268292682925) internal successors, (7403), 2255 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7403 transitions. [2022-02-11 00:49:49,886 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7403 transitions. Word has length 24 [2022-02-11 00:49:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:49,886 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 7403 transitions. [2022-02-11 00:49:49,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2022-02-11 00:49:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7403 transitions. [2022-02-11 00:49:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:49,889 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:49,889 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:49,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:50,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:50,090 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:50,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:50,090 INFO L85 PathProgramCache]: Analyzing trace with hash 443570164, now seen corresponding path program 19 times [2022-02-11 00:49:50,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:50,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824321517] [2022-02-11 00:49:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:50,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:50,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:50,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824321517] [2022-02-11 00:49:50,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824321517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:50,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554746185] [2022-02-11 00:49:50,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:50,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:50,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:50,297 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:50,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-11 00:49:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:50,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:50,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:50,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:50,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:50,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:50,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:50,595 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 33 treesize of output 17 [2022-02-11 00:49:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:50,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:50,879 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:50,880 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 20 treesize of output 43 [2022-02-11 00:49:50,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:50,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:50,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:49:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:50,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554746185] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:50,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:50,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:49:50,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498336353] [2022-02-11 00:49:50,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:50,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:49:50,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:49:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:49:50,946 INFO L87 Difference]: Start difference. First operand 2256 states and 7403 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:49:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:51,975 INFO L93 Difference]: Finished difference Result 2774 states and 8963 transitions. [2022-02-11 00:49:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:49:51,976 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-02-11 00:49:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:51,990 INFO L225 Difference]: With dead ends: 2774 [2022-02-11 00:49:51,991 INFO L226 Difference]: Without dead ends: 2767 [2022-02-11 00:49:51,991 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:49:51,991 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:51,991 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 156 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1613 Invalid, 0 Unknown, 844 Unchecked, 0.6s Time] [2022-02-11 00:49:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2022-02-11 00:49:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2254. [2022-02-11 00:49:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 3.28450954283178) internal successors, (7400), 2253 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 7400 transitions. [2022-02-11 00:49:52,020 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 7400 transitions. Word has length 24 [2022-02-11 00:49:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:52,020 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 7400 transitions. [2022-02-11 00:49:52,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-02-11 00:49:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 7400 transitions. [2022-02-11 00:49:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:52,023 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:52,023 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:52,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-02-11 00:49:52,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:52,224 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1659991413, now seen corresponding path program 109 times [2022-02-11 00:49:52,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:52,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170557705] [2022-02-11 00:49:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:52,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:52,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:52,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170557705] [2022-02-11 00:49:52,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170557705] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:52,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478968443] [2022-02-11 00:49:52,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:52,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:52,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:52,441 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:52,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-11 00:49:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:52,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:52,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:52,719 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 33 treesize of output 17 [2022-02-11 00:49:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:52,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:52,980 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:49:52,981 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 20 treesize of output 43 [2022-02-11 00:49:53,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:53,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:53,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:53,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:53,020 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 20 treesize of output 3 [2022-02-11 00:49:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:53,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478968443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:53,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:53,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:49:53,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193222001] [2022-02-11 00:49:53,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:53,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:49:53,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:49:53,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:49:53,036 INFO L87 Difference]: Start difference. First operand 2254 states and 7400 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:53,789 INFO L93 Difference]: Finished difference Result 2643 states and 8605 transitions. [2022-02-11 00:49:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:49:53,789 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:53,794 INFO L225 Difference]: With dead ends: 2643 [2022-02-11 00:49:53,794 INFO L226 Difference]: Without dead ends: 2637 [2022-02-11 00:49:53,794 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:49:53,794 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1088 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:53,794 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 133 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1156 Invalid, 0 Unknown, 1088 Unchecked, 0.4s Time] [2022-02-11 00:49:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-02-11 00:49:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2232. [2022-02-11 00:49:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 3.2909009412819366) internal successors, (7342), 2231 states have internal predecessors, (7342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 7342 transitions. [2022-02-11 00:49:53,824 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 7342 transitions. Word has length 24 [2022-02-11 00:49:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:53,824 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 7342 transitions. [2022-02-11 00:49:53,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 7342 transitions. [2022-02-11 00:49:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:53,827 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:53,827 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:53,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:54,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-02-11 00:49:54,027 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:54,027 INFO L85 PathProgramCache]: Analyzing trace with hash -22424909, now seen corresponding path program 110 times [2022-02-11 00:49:54,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:54,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139842994] [2022-02-11 00:49:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:54,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:54,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:54,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139842994] [2022-02-11 00:49:54,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139842994] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:54,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446940258] [2022-02-11 00:49:54,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:49:54,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:54,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:54,263 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:54,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-11 00:49:54,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:49:54,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:54,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:54,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:54,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:54,588 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 39 treesize of output 51 [2022-02-11 00:49:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:54,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:55,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:55,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:55,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:55,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:55,085 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 45 treesize of output 50 [2022-02-11 00:49:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:55,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446940258] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:55,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:55,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 28 [2022-02-11 00:49:55,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187733437] [2022-02-11 00:49:55,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:55,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:49:55,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:55,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:49:55,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:49:55,168 INFO L87 Difference]: Start difference. First operand 2232 states and 7342 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:55,921 INFO L93 Difference]: Finished difference Result 2702 states and 8810 transitions. [2022-02-11 00:49:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:49:55,921 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:55,926 INFO L225 Difference]: With dead ends: 2702 [2022-02-11 00:49:55,927 INFO L226 Difference]: Without dead ends: 2690 [2022-02-11 00:49:55,927 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:49:55,927 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:55,927 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 124 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 851 Invalid, 0 Unknown, 572 Unchecked, 0.3s Time] [2022-02-11 00:49:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2022-02-11 00:49:55,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2249. [2022-02-11 00:49:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 3.2895907473309607) internal successors, (7395), 2248 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 7395 transitions. [2022-02-11 00:49:55,958 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 7395 transitions. Word has length 24 [2022-02-11 00:49:55,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:55,959 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 7395 transitions. [2022-02-11 00:49:55,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:55,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 7395 transitions. [2022-02-11 00:49:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:55,962 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:55,962 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:55,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:56,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-02-11 00:49:56,179 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:49:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:56,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1339655707, now seen corresponding path program 111 times [2022-02-11 00:49:56,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:56,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137159071] [2022-02-11 00:49:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:56,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:56,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:56,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137159071] [2022-02-11 00:49:56,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137159071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:56,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385213518] [2022-02-11 00:49:56,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:49:56,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:56,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:56,449 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:49:56,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-11 00:49:56,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:49:56,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:56,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:56,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:56,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:56,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:56,745 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 35 treesize of output 57 [2022-02-11 00:49:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:57,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:57,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:57,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:57,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:57,451 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 45 treesize of output 7 [2022-02-11 00:49:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:57,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385213518] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:57,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:57,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:49:57,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228089254] [2022-02-11 00:49:57,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:57,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:49:57,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:49:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:49:57,481 INFO L87 Difference]: Start difference. First operand 2249 states and 7395 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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) [2022-02-11 00:50:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:01,489 INFO L93 Difference]: Finished difference Result 3092 states and 9920 transitions. [2022-02-11 00:50:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-11 00:50:01,490 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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 [2022-02-11 00:50:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:01,495 INFO L225 Difference]: With dead ends: 3092 [2022-02-11 00:50:01,495 INFO L226 Difference]: Without dead ends: 3072 [2022-02-11 00:50:01,496 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=735, Invalid=6575, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:50:01,496 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 327 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:01,496 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 186 Invalid, 3533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2427 Invalid, 0 Unknown, 924 Unchecked, 1.1s Time] [2022-02-11 00:50:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-02-11 00:50:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2263. [2022-02-11 00:50:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.2939876215738284) internal successors, (7451), 2262 states have internal predecessors, (7451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7451 transitions. [2022-02-11 00:50:01,532 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7451 transitions. Word has length 24 [2022-02-11 00:50:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:01,532 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7451 transitions. [2022-02-11 00:50:01,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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) [2022-02-11 00:50:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7451 transitions. [2022-02-11 00:50:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:01,535 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:01,536 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:01,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-02-11 00:50:01,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:01,736 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash -299419909, now seen corresponding path program 112 times [2022-02-11 00:50:01,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:01,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336954277] [2022-02-11 00:50:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:01,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:01,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:01,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336954277] [2022-02-11 00:50:01,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336954277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:01,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058136303] [2022-02-11 00:50:01,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:01,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:01,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:01,989 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:01,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-11 00:50:02,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:02,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:02,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:02,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:02,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:02,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:02,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:02,198 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 34 treesize of output 20 [2022-02-11 00:50:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:02,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:02,497 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:50:02,497 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 20 treesize of output 43 [2022-02-11 00:50:02,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:02,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:02,548 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 20 treesize of output 3 [2022-02-11 00:50:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:02,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058136303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:02,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:02,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:50:02,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109600581] [2022-02-11 00:50:02,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:02,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:50:02,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:50:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:50:02,564 INFO L87 Difference]: Start difference. First operand 2263 states and 7451 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:50:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:03,540 INFO L93 Difference]: Finished difference Result 2531 states and 8331 transitions. [2022-02-11 00:50:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:50:03,540 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:50:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:03,545 INFO L225 Difference]: With dead ends: 2531 [2022-02-11 00:50:03,545 INFO L226 Difference]: Without dead ends: 2524 [2022-02-11 00:50:03,545 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:50:03,546 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 99 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:03,546 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 103 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1538 Invalid, 0 Unknown, 480 Unchecked, 0.6s Time] [2022-02-11 00:50:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2022-02-11 00:50:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2265. [2022-02-11 00:50:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 3.2928445229681977) internal successors, (7455), 2264 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 7455 transitions. [2022-02-11 00:50:03,574 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 7455 transitions. Word has length 24 [2022-02-11 00:50:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:03,574 INFO L470 AbstractCegarLoop]: Abstraction has 2265 states and 7455 transitions. [2022-02-11 00:50:03,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:50:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 7455 transitions. [2022-02-11 00:50:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:03,577 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:03,577 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:03,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-02-11 00:50:03,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2022-02-11 00:50:03,778 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1133158349, now seen corresponding path program 113 times [2022-02-11 00:50:03,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:03,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123447087] [2022-02-11 00:50:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:03,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:04,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:04,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123447087] [2022-02-11 00:50:04,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123447087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:04,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263593046] [2022-02-11 00:50:04,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:04,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:04,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:04,010 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:04,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-11 00:50:04,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:50:04,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:04,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:50:04,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:04,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:04,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:04,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:04,263 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-02-11 00:50:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:04,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:05,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:05,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:05,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:05,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:05,072 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 37 treesize of output 7 [2022-02-11 00:50:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:05,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263593046] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:05,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:05,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:50:05,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626829950] [2022-02-11 00:50:05,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:05,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:50:05,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:05,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:50:05,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:50:05,111 INFO L87 Difference]: Start difference. First operand 2265 states and 7455 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:06,115 INFO L93 Difference]: Finished difference Result 2355 states and 7699 transitions. [2022-02-11 00:50:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:50:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:50:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:06,119 INFO L225 Difference]: With dead ends: 2355 [2022-02-11 00:50:06,119 INFO L226 Difference]: Without dead ends: 2353 [2022-02-11 00:50:06,119 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:50:06,119 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:06,119 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 123 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 821 Invalid, 0 Unknown, 494 Unchecked, 0.3s Time] [2022-02-11 00:50:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-02-11 00:50:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2274. [2022-02-11 00:50:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 2273 states have (on average 3.291684997800264) internal successors, (7482), 2273 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 7482 transitions. [2022-02-11 00:50:06,146 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 7482 transitions. Word has length 24 [2022-02-11 00:50:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:06,146 INFO L470 AbstractCegarLoop]: Abstraction has 2274 states and 7482 transitions. [2022-02-11 00:50:06,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 7482 transitions. [2022-02-11 00:50:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:06,149 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:06,149 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:06,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-02-11 00:50:06,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:06,349 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:06,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1149245489, now seen corresponding path program 114 times [2022-02-11 00:50:06,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:06,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871422812] [2022-02-11 00:50:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:06,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:06,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:06,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871422812] [2022-02-11 00:50:06,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871422812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:06,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965806606] [2022-02-11 00:50:06,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:06,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:06,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:06,579 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:06,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-11 00:50:06,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:50:06,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:06,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:50:06,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:06,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:06,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:06,830 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:50:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:07,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:07,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:07,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:07,429 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 38 treesize of output 55 [2022-02-11 00:50:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:07,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965806606] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:07,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:07,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:50:07,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614061776] [2022-02-11 00:50:07,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:07,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:50:07,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:07,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:50:07,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:50:07,534 INFO L87 Difference]: Start difference. First operand 2274 states and 7482 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:08,932 INFO L93 Difference]: Finished difference Result 2560 states and 8385 transitions. [2022-02-11 00:50:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:50:08,932 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:50:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:08,936 INFO L225 Difference]: With dead ends: 2560 [2022-02-11 00:50:08,936 INFO L226 Difference]: Without dead ends: 2551 [2022-02-11 00:50:08,937 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:50:08,937 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 108 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:08,937 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 114 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1856 Invalid, 0 Unknown, 389 Unchecked, 0.7s Time] [2022-02-11 00:50:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2022-02-11 00:50:08,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2279. [2022-02-11 00:50:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 3.2888498683055314) internal successors, (7492), 2278 states have internal predecessors, (7492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 7492 transitions. [2022-02-11 00:50:08,964 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 7492 transitions. Word has length 24 [2022-02-11 00:50:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:08,964 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 7492 transitions. [2022-02-11 00:50:08,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 7492 transitions. [2022-02-11 00:50:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:08,967 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:08,967 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:08,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-02-11 00:50:09,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:09,167 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:09,167 INFO L85 PathProgramCache]: Analyzing trace with hash -97756617, now seen corresponding path program 115 times [2022-02-11 00:50:09,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:09,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847524477] [2022-02-11 00:50:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:09,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:09,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:09,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847524477] [2022-02-11 00:50:09,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847524477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:09,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544928341] [2022-02-11 00:50:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:09,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:09,431 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:09,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-11 00:50:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:09,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:09,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:09,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:09,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:09,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:09,680 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 37 treesize of output 21 [2022-02-11 00:50:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:09,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:09,976 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:50:09,976 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 20 treesize of output 43 [2022-02-11 00:50:10,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:10,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:10,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:10,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:10,025 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 20 treesize of output 3 [2022-02-11 00:50:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:10,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544928341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:10,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:10,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:50:10,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933193033] [2022-02-11 00:50:10,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:10,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:50:10,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:50:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:50:10,041 INFO L87 Difference]: Start difference. First operand 2279 states and 7492 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:50:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:11,140 INFO L93 Difference]: Finished difference Result 2643 states and 8668 transitions. [2022-02-11 00:50:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:50:11,140 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:50:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:11,145 INFO L225 Difference]: With dead ends: 2643 [2022-02-11 00:50:11,145 INFO L226 Difference]: Without dead ends: 2639 [2022-02-11 00:50:11,145 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:50:11,145 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 884 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:11,145 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 203 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1410 Invalid, 0 Unknown, 884 Unchecked, 0.6s Time] [2022-02-11 00:50:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-02-11 00:50:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2298. [2022-02-11 00:50:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 3.286460600783631) internal successors, (7549), 2297 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 7549 transitions. [2022-02-11 00:50:11,184 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 7549 transitions. Word has length 24 [2022-02-11 00:50:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:11,184 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 7549 transitions. [2022-02-11 00:50:11,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:50:11,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 7549 transitions. [2022-02-11 00:50:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:11,187 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:11,187 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:11,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-02-11 00:50:11,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:11,388 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash 789747064, now seen corresponding path program 20 times [2022-02-11 00:50:11,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:11,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123103171] [2022-02-11 00:50:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:11,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:11,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:11,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123103171] [2022-02-11 00:50:11,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123103171] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:11,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422957746] [2022-02-11 00:50:11,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:11,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:11,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:11,647 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:11,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-11 00:50:11,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:11,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:11,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:50:11,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:11,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:11,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:11,946 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-02-11 00:50:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:12,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:12,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:12,521 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 38 treesize of output 55 [2022-02-11 00:50:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:12,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422957746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:12,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:12,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:50:12,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147681637] [2022-02-11 00:50:12,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:12,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:50:12,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:12,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:50:12,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:50:12,632 INFO L87 Difference]: Start difference. First operand 2298 states and 7549 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:50:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:14,155 INFO L93 Difference]: Finished difference Result 2580 states and 8443 transitions. [2022-02-11 00:50:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:50:14,156 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 [2022-02-11 00:50:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:14,160 INFO L225 Difference]: With dead ends: 2580 [2022-02-11 00:50:14,160 INFO L226 Difference]: Without dead ends: 2572 [2022-02-11 00:50:14,161 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=2181, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:50:14,161 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 172 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:14,161 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 129 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1795 Invalid, 0 Unknown, 529 Unchecked, 0.7s Time] [2022-02-11 00:50:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-02-11 00:50:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2299. [2022-02-11 00:50:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.286771105308964) internal successors, (7553), 2298 states have internal predecessors, (7553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 7553 transitions. [2022-02-11 00:50:14,191 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 7553 transitions. Word has length 24 [2022-02-11 00:50:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:14,191 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 7553 transitions. [2022-02-11 00:50:14,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:50:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 7553 transitions. [2022-02-11 00:50:14,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:14,194 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:14,194 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:14,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:14,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:14,395 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:14,395 INFO L85 PathProgramCache]: Analyzing trace with hash -836912765, now seen corresponding path program 116 times [2022-02-11 00:50:14,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:14,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487313201] [2022-02-11 00:50:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:14,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:14,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:14,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487313201] [2022-02-11 00:50:14,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487313201] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:14,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101943695] [2022-02-11 00:50:14,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:14,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:14,656 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:14,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-11 00:50:14,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:14,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:14,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:50:14,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:14,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:14,910 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:50:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:15,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:15,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:15,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:15,452 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 37 treesize of output 54 [2022-02-11 00:50:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:15,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101943695] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:15,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:15,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:50:15,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960637476] [2022-02-11 00:50:15,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:15,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:50:15,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:15,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:50:15,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:15,553 INFO L87 Difference]: Start difference. First operand 2299 states and 7553 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:16,769 INFO L93 Difference]: Finished difference Result 2549 states and 8360 transitions. [2022-02-11 00:50:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:50:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:50:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:16,774 INFO L225 Difference]: With dead ends: 2549 [2022-02-11 00:50:16,774 INFO L226 Difference]: Without dead ends: 2542 [2022-02-11 00:50:16,775 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=228, Invalid=1752, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:50:16,775 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:16,775 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 125 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1764 Invalid, 0 Unknown, 418 Unchecked, 0.7s Time] [2022-02-11 00:50:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2022-02-11 00:50:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2302. [2022-02-11 00:50:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 3.2859626249456757) internal successors, (7561), 2301 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 7561 transitions. [2022-02-11 00:50:16,802 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 7561 transitions. Word has length 24 [2022-02-11 00:50:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:16,802 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 7561 transitions. [2022-02-11 00:50:16,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 7561 transitions. [2022-02-11 00:50:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:16,805 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:16,805 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:16,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-02-11 00:50:17,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:17,005 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1670651205, now seen corresponding path program 117 times [2022-02-11 00:50:17,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:17,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871875292] [2022-02-11 00:50:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:17,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:17,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871875292] [2022-02-11 00:50:17,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871875292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:17,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854041133] [2022-02-11 00:50:17,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:17,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:17,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:17,251 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:17,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-11 00:50:17,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:50:17,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:50:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:17,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:17,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:17,497 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 32 treesize of output 56 [2022-02-11 00:50:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:18,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:18,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:18,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:18,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:18,690 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 42 treesize of output 61 [2022-02-11 00:50:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:18,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854041133] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:18,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:18,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-02-11 00:50:18,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280686971] [2022-02-11 00:50:18,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:18,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:50:18,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:18,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:50:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:50:18,851 INFO L87 Difference]: Start difference. First operand 2302 states and 7561 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 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) [2022-02-11 00:50:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:21,670 INFO L93 Difference]: Finished difference Result 2576 states and 8306 transitions. [2022-02-11 00:50:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:50:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 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 24 [2022-02-11 00:50:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:21,675 INFO L225 Difference]: With dead ends: 2576 [2022-02-11 00:50:21,675 INFO L226 Difference]: Without dead ends: 2537 [2022-02-11 00:50:21,676 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=387, Invalid=4169, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:50:21,676 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 161 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 968 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:21,676 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 168 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2192 Invalid, 0 Unknown, 968 Unchecked, 0.9s Time] [2022-02-11 00:50:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-02-11 00:50:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2314. [2022-02-11 00:50:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 3.283614353653264) internal successors, (7595), 2313 states have internal predecessors, (7595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 7595 transitions. [2022-02-11 00:50:21,713 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 7595 transitions. Word has length 24 [2022-02-11 00:50:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:21,713 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 7595 transitions. [2022-02-11 00:50:21,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 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) [2022-02-11 00:50:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 7595 transitions. [2022-02-11 00:50:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:21,716 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:21,716 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:21,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-02-11 00:50:21,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2022-02-11 00:50:21,916 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash -335916765, now seen corresponding path program 118 times [2022-02-11 00:50:21,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:21,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501471682] [2022-02-11 00:50:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:21,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:22,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:22,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501471682] [2022-02-11 00:50:22,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501471682] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:22,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038852909] [2022-02-11 00:50:22,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:22,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:22,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:22,139 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:22,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-11 00:50:22,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:22,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:22,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:22,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:22,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:22,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:22,372 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 33 treesize of output 17 [2022-02-11 00:50:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:22,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:22,671 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:50:22,672 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 20 treesize of output 43 [2022-02-11 00:50:22,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:22,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:22,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:22,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:22,719 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 20 treesize of output 3 [2022-02-11 00:50:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:22,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038852909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:22,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:22,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:50:22,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753213724] [2022-02-11 00:50:22,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:22,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:50:22,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:22,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:50:22,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:50:22,735 INFO L87 Difference]: Start difference. First operand 2314 states and 7595 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:24,059 INFO L93 Difference]: Finished difference Result 2761 states and 9036 transitions. [2022-02-11 00:50:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:50:24,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:50:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:24,065 INFO L225 Difference]: With dead ends: 2761 [2022-02-11 00:50:24,065 INFO L226 Difference]: Without dead ends: 2743 [2022-02-11 00:50:24,065 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:50:24,065 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 111 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 789 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:24,066 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 98 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1605 Invalid, 0 Unknown, 789 Unchecked, 0.6s Time] [2022-02-11 00:50:24,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-02-11 00:50:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2344. [2022-02-11 00:50:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.2979086641058473) internal successors, (7727), 2343 states have internal predecessors, (7727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7727 transitions. [2022-02-11 00:50:24,100 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7727 transitions. Word has length 24 [2022-02-11 00:50:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:24,100 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 7727 transitions. [2022-02-11 00:50:24,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7727 transitions. [2022-02-11 00:50:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:24,103 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:24,103 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:24,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-02-11 00:50:24,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-02-11 00:50:24,319 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1370690325, now seen corresponding path program 119 times [2022-02-11 00:50:24,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:24,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004112028] [2022-02-11 00:50:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:24,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:24,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:24,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004112028] [2022-02-11 00:50:24,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004112028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:24,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754620441] [2022-02-11 00:50:24,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:24,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:24,566 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:24,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-11 00:50:24,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:50:24,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:24,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:24,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:24,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:24,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:24,816 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 37 treesize of output 21 [2022-02-11 00:50:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:24,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:25,125 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:50:25,126 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 20 treesize of output 43 [2022-02-11 00:50:25,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:25,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:25,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:25,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:25,172 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 20 treesize of output 3 [2022-02-11 00:50:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:25,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754620441] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:25,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:25,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:50:25,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431546114] [2022-02-11 00:50:25,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:25,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:50:25,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:50:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:50:25,188 INFO L87 Difference]: Start difference. First operand 2344 states and 7727 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:50:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:26,671 INFO L93 Difference]: Finished difference Result 2736 states and 8917 transitions. [2022-02-11 00:50:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:50:26,671 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:50:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:26,676 INFO L225 Difference]: With dead ends: 2736 [2022-02-11 00:50:26,676 INFO L226 Difference]: Without dead ends: 2717 [2022-02-11 00:50:26,677 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:50:26,677 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 164 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 798 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:26,677 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 122 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1614 Invalid, 0 Unknown, 798 Unchecked, 0.7s Time] [2022-02-11 00:50:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2022-02-11 00:50:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2356. [2022-02-11 00:50:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.3002123142250532) internal successors, (7772), 2355 states have internal predecessors, (7772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 7772 transitions. [2022-02-11 00:50:26,709 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 7772 transitions. Word has length 24 [2022-02-11 00:50:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:26,709 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 7772 transitions. [2022-02-11 00:50:26,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:50:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 7772 transitions. [2022-02-11 00:50:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:26,712 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:26,712 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:26,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-02-11 00:50:26,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-11 00:50:26,913 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2109846473, now seen corresponding path program 120 times [2022-02-11 00:50:26,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:26,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97459190] [2022-02-11 00:50:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:26,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:27,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:27,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97459190] [2022-02-11 00:50:27,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97459190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:27,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748268844] [2022-02-11 00:50:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:27,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:27,162 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:27,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-11 00:50:27,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:50:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:27,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:50:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:27,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:27,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:27,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:50:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:27,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:27,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:27,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:27,959 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 37 treesize of output 54 [2022-02-11 00:50:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:28,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748268844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:28,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:28,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:50:28,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248987294] [2022-02-11 00:50:28,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:28,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:50:28,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:50:28,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:28,055 INFO L87 Difference]: Start difference. First operand 2356 states and 7772 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:29,257 INFO L93 Difference]: Finished difference Result 2620 states and 8615 transitions. [2022-02-11 00:50:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:50:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:50:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:29,262 INFO L225 Difference]: With dead ends: 2620 [2022-02-11 00:50:29,262 INFO L226 Difference]: Without dead ends: 2613 [2022-02-11 00:50:29,262 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:50:29,262 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:29,262 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 109 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1530 Invalid, 0 Unknown, 212 Unchecked, 0.6s Time] [2022-02-11 00:50:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-02-11 00:50:29,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2357. [2022-02-11 00:50:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 3.299660441426146) internal successors, (7774), 2356 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7774 transitions. [2022-02-11 00:50:29,296 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7774 transitions. Word has length 24 [2022-02-11 00:50:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:29,296 INFO L470 AbstractCegarLoop]: Abstraction has 2357 states and 7774 transitions. [2022-02-11 00:50:29,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7774 transitions. [2022-02-11 00:50:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:29,299 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:29,299 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:29,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-02-11 00:50:29,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-02-11 00:50:29,500 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1351382383, now seen corresponding path program 121 times [2022-02-11 00:50:29,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:29,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699694968] [2022-02-11 00:50:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:29,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:29,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:29,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699694968] [2022-02-11 00:50:29,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699694968] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:29,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938605742] [2022-02-11 00:50:29,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:29,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:29,747 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:29,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-11 00:50:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:29,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:29,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:29,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:29,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:29,960 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 34 treesize of output 20 [2022-02-11 00:50:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:30,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:30,267 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:50:30,267 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 20 treesize of output 43 [2022-02-11 00:50:30,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:30,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:30,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:30,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:30,318 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 20 treesize of output 3 [2022-02-11 00:50:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:30,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938605742] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:30,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:30,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:50:30,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580022630] [2022-02-11 00:50:30,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:30,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:50:30,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:50:30,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:50:30,352 INFO L87 Difference]: Start difference. First operand 2357 states and 7774 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:50:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:31,487 INFO L93 Difference]: Finished difference Result 2680 states and 8841 transitions. [2022-02-11 00:50:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:50:31,487 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:50:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:31,492 INFO L225 Difference]: With dead ends: 2680 [2022-02-11 00:50:31,492 INFO L226 Difference]: Without dead ends: 2665 [2022-02-11 00:50:31,492 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:50:31,492 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:31,492 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 89 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1496 Invalid, 0 Unknown, 250 Unchecked, 0.6s Time] [2022-02-11 00:50:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-02-11 00:50:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2367. [2022-02-11 00:50:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2366 states have (on average 3.3026204564666104) internal successors, (7814), 2366 states have internal predecessors, (7814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 7814 transitions. [2022-02-11 00:50:31,522 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 7814 transitions. Word has length 24 [2022-02-11 00:50:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:31,522 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 7814 transitions. [2022-02-11 00:50:31,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:50:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 7814 transitions. [2022-02-11 00:50:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:31,525 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:31,525 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:31,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-02-11 00:50:31,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:31,726 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:31,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:31,726 INFO L85 PathProgramCache]: Analyzing trace with hash -906129461, now seen corresponding path program 122 times [2022-02-11 00:50:31,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:31,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020147529] [2022-02-11 00:50:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:31,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:31,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:31,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020147529] [2022-02-11 00:50:31,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020147529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:31,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704563320] [2022-02-11 00:50:31,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:31,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:31,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:31,953 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:31,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-11 00:50:31,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:31,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:31,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:50:31,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:32,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:32,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:32,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:50:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:32,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:32,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:32,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:32,744 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 37 treesize of output 54 [2022-02-11 00:50:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:32,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704563320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:32,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:32,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:50:32,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609598878] [2022-02-11 00:50:32,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:32,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:50:32,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:50:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:32,842 INFO L87 Difference]: Start difference. First operand 2367 states and 7814 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-02-11 00:50:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:33,811 INFO L93 Difference]: Finished difference Result 2581 states and 8508 transitions. [2022-02-11 00:50:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:50:33,811 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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 [2022-02-11 00:50:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:33,816 INFO L225 Difference]: With dead ends: 2581 [2022-02-11 00:50:33,816 INFO L226 Difference]: Without dead ends: 2575 [2022-02-11 00:50:33,816 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:50:33,816 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 94 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:33,816 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 113 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1432 Invalid, 0 Unknown, 306 Unchecked, 0.6s Time] [2022-02-11 00:50:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2022-02-11 00:50:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 2371. [2022-02-11 00:50:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 3.3042194092827004) internal successors, (7831), 2370 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 7831 transitions. [2022-02-11 00:50:33,854 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 7831 transitions. Word has length 24 [2022-02-11 00:50:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:33,854 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 7831 transitions. [2022-02-11 00:50:33,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-02-11 00:50:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 7831 transitions. [2022-02-11 00:50:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:33,857 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:33,857 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:33,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-02-11 00:50:34,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:34,057 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1986637321, now seen corresponding path program 123 times [2022-02-11 00:50:34,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:34,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388390060] [2022-02-11 00:50:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:34,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:34,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:34,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388390060] [2022-02-11 00:50:34,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388390060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:34,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045406019] [2022-02-11 00:50:34,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:34,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:34,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:34,278 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:34,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-11 00:50:34,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:50:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:34,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:34,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:34,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:34,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:34,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:34,496 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 36 treesize of output 60 [2022-02-11 00:50:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:34,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:35,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:35,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:35,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:35,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:35,241 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 45 treesize of output 7 [2022-02-11 00:50:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:35,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045406019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:35,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:35,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-11 00:50:35,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962914578] [2022-02-11 00:50:35,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:35,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:50:35,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:50:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:50:35,270 INFO L87 Difference]: Start difference. First operand 2371 states and 7831 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:50:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:37,900 INFO L93 Difference]: Finished difference Result 3227 states and 10485 transitions. [2022-02-11 00:50:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:50:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 [2022-02-11 00:50:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:37,905 INFO L225 Difference]: With dead ends: 3227 [2022-02-11 00:50:37,905 INFO L226 Difference]: Without dead ends: 3207 [2022-02-11 00:50:37,906 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=441, Invalid=3849, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:50:37,906 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 246 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:37,906 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 114 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2015 Invalid, 0 Unknown, 891 Unchecked, 0.9s Time] [2022-02-11 00:50:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-02-11 00:50:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 2400. [2022-02-11 00:50:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 3.303876615256357) internal successors, (7926), 2399 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 7926 transitions. [2022-02-11 00:50:37,938 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 7926 transitions. Word has length 24 [2022-02-11 00:50:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:37,939 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 7926 transitions. [2022-02-11 00:50:37,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:50:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 7926 transitions. [2022-02-11 00:50:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:37,942 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:37,942 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:37,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:38,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-02-11 00:50:38,142 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:38,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1846621901, now seen corresponding path program 124 times [2022-02-11 00:50:38,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:38,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209892473] [2022-02-11 00:50:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:38,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:38,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:38,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209892473] [2022-02-11 00:50:38,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209892473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:38,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036644343] [2022-02-11 00:50:38,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:38,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:38,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:38,375 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:38,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-11 00:50:38,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:38,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:38,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:38,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:38,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:38,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:38,589 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 30 treesize of output 16 [2022-02-11 00:50:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:38,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:38,890 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:50:38,890 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 20 treesize of output 43 [2022-02-11 00:50:38,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:38,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:38,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:38,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:38,940 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 20 treesize of output 3 [2022-02-11 00:50:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:38,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036644343] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:38,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:38,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:50:38,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102452233] [2022-02-11 00:50:38,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:38,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:50:38,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:38,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:50:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:50:38,956 INFO L87 Difference]: Start difference. First operand 2400 states and 7926 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:40,395 INFO L93 Difference]: Finished difference Result 2831 states and 9332 transitions. [2022-02-11 00:50:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:50:40,396 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:50:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:40,401 INFO L225 Difference]: With dead ends: 2831 [2022-02-11 00:50:40,401 INFO L226 Difference]: Without dead ends: 2813 [2022-02-11 00:50:40,401 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=294, Invalid=2358, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:50:40,401 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:40,401 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 101 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1636 Invalid, 0 Unknown, 538 Unchecked, 0.6s Time] [2022-02-11 00:50:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-02-11 00:50:40,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2436. [2022-02-11 00:50:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.313757700205339) internal successors, (8069), 2435 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 8069 transitions. [2022-02-11 00:50:40,433 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 8069 transitions. Word has length 24 [2022-02-11 00:50:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:40,434 INFO L470 AbstractCegarLoop]: Abstraction has 2436 states and 8069 transitions. [2022-02-11 00:50:40,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 8069 transitions. [2022-02-11 00:50:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:40,437 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:40,437 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:40,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-02-11 00:50:40,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-02-11 00:50:40,637 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:40,638 INFO L85 PathProgramCache]: Analyzing trace with hash -338560521, now seen corresponding path program 125 times [2022-02-11 00:50:40,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:40,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965117315] [2022-02-11 00:50:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:40,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:40,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:40,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965117315] [2022-02-11 00:50:40,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965117315] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:40,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706902229] [2022-02-11 00:50:40,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:40,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:40,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:40,901 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:40,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-11 00:50:40,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:50:40,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:40,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:40,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:41,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:41,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:41,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:41,096 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 23 treesize of output 39 [2022-02-11 00:50:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:41,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:41,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:41,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:41,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:41,468 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 20 treesize of output 37 [2022-02-11 00:50:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:41,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706902229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:41,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:41,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-02-11 00:50:41,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552665166] [2022-02-11 00:50:41,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:41,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 00:50:41,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 00:50:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:50:41,522 INFO L87 Difference]: Start difference. First operand 2436 states and 8069 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:44,843 INFO L93 Difference]: Finished difference Result 3014 states and 9665 transitions. [2022-02-11 00:50:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 00:50:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:50:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:44,849 INFO L225 Difference]: With dead ends: 3014 [2022-02-11 00:50:44,849 INFO L226 Difference]: Without dead ends: 2999 [2022-02-11 00:50:44,849 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=661, Invalid=5981, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 00:50:44,850 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 343 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 3793 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:44,850 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 378 Invalid, 3896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3793 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 00:50:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2022-02-11 00:50:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2444. [2022-02-11 00:50:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 3.316823577568563) internal successors, (8103), 2443 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 8103 transitions. [2022-02-11 00:50:44,886 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 8103 transitions. Word has length 24 [2022-02-11 00:50:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:44,886 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 8103 transitions. [2022-02-11 00:50:44,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 8103 transitions. [2022-02-11 00:50:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:44,890 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:44,890 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:44,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:45,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-02-11 00:50:45,090 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1851008737, now seen corresponding path program 126 times [2022-02-11 00:50:45,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:45,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940105839] [2022-02-11 00:50:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:45,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:45,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940105839] [2022-02-11 00:50:45,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940105839] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:45,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214185909] [2022-02-11 00:50:45,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:45,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:45,321 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:45,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-11 00:50:45,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:50:45,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:45,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:50:45,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:45,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:45,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:45,554 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:50:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:45,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:46,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:46,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:46,140 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 38 treesize of output 55 [2022-02-11 00:50:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:46,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214185909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:46,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:46,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:50:46,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764317973] [2022-02-11 00:50:46,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:46,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:50:46,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:46,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:50:46,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:50:46,266 INFO L87 Difference]: Start difference. First operand 2444 states and 8103 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:47,583 INFO L93 Difference]: Finished difference Result 2687 states and 8873 transitions. [2022-02-11 00:50:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:50:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:50:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:47,588 INFO L225 Difference]: With dead ends: 2687 [2022-02-11 00:50:47,588 INFO L226 Difference]: Without dead ends: 2673 [2022-02-11 00:50:47,588 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:50:47,588 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:47,588 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 98 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1975 Invalid, 0 Unknown, 262 Unchecked, 0.8s Time] [2022-02-11 00:50:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-02-11 00:50:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2448. [2022-02-11 00:50:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 3.315488353085411) internal successors, (8113), 2447 states have internal predecessors, (8113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 8113 transitions. [2022-02-11 00:50:47,618 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 8113 transitions. Word has length 24 [2022-02-11 00:50:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:47,618 INFO L470 AbstractCegarLoop]: Abstraction has 2448 states and 8113 transitions. [2022-02-11 00:50:47,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 8113 transitions. [2022-02-11 00:50:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:47,621 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:47,621 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:47,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-02-11 00:50:47,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:47,822 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:47,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:47,822 INFO L85 PathProgramCache]: Analyzing trace with hash -66820087, now seen corresponding path program 127 times [2022-02-11 00:50:47,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:47,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776155814] [2022-02-11 00:50:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:47,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:48,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:48,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776155814] [2022-02-11 00:50:48,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776155814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:48,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800486778] [2022-02-11 00:50:48,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:48,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:48,080 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:48,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-11 00:50:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:48,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:48,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:48,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:48,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:48,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:48,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:48,288 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 30 treesize of output 16 [2022-02-11 00:50:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:48,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:48,587 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:50:48,587 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 20 treesize of output 43 [2022-02-11 00:50:48,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:48,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:48,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:48,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:48,645 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 20 treesize of output 3 [2022-02-11 00:50:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:48,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800486778] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:48,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:48,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:50:48,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432556271] [2022-02-11 00:50:48,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:48,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:50:48,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:50:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:50:48,661 INFO L87 Difference]: Start difference. First operand 2448 states and 8113 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:50,158 INFO L93 Difference]: Finished difference Result 2794 states and 9212 transitions. [2022-02-11 00:50:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:50:50,158 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:50:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:50,163 INFO L225 Difference]: With dead ends: 2794 [2022-02-11 00:50:50,164 INFO L226 Difference]: Without dead ends: 2777 [2022-02-11 00:50:50,164 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=282, Invalid=2474, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:50:50,164 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:50,164 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 99 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1884 Invalid, 0 Unknown, 480 Unchecked, 0.7s Time] [2022-02-11 00:50:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2022-02-11 00:50:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2474. [2022-02-11 00:50:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 3.3255155681358675) internal successors, (8224), 2473 states have internal predecessors, (8224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8224 transitions. [2022-02-11 00:50:50,200 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8224 transitions. Word has length 24 [2022-02-11 00:50:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:50,200 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 8224 transitions. [2022-02-11 00:50:50,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8224 transitions. [2022-02-11 00:50:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:50,204 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:50,204 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:50,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-02-11 00:50:50,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:50,404 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1667257941, now seen corresponding path program 128 times [2022-02-11 00:50:50,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:50,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144041533] [2022-02-11 00:50:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:50,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:50,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:50,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144041533] [2022-02-11 00:50:50,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144041533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:50,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888762332] [2022-02-11 00:50:50,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:50,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:50,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:50,643 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:50,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-11 00:50:50,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:50,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:50:50,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:50,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:50,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:50,878 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:50:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:51,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:51,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:51,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:51,504 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 38 treesize of output 55 [2022-02-11 00:50:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:51,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888762332] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:51,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:51,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:50:51,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427799303] [2022-02-11 00:50:51,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:50:51,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:50:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:50:51,586 INFO L87 Difference]: Start difference. First operand 2474 states and 8224 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:50:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:52,839 INFO L93 Difference]: Finished difference Result 2838 states and 9378 transitions. [2022-02-11 00:50:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:50:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 [2022-02-11 00:50:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:52,845 INFO L225 Difference]: With dead ends: 2838 [2022-02-11 00:50:52,845 INFO L226 Difference]: Without dead ends: 2823 [2022-02-11 00:50:52,845 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=1676, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:50:52,845 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:52,846 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 101 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1753 Invalid, 0 Unknown, 527 Unchecked, 0.7s Time] [2022-02-11 00:50:52,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-02-11 00:50:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2498. [2022-02-11 00:50:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 3.329195034040849) internal successors, (8313), 2497 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 8313 transitions. [2022-02-11 00:50:52,881 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 8313 transitions. Word has length 24 [2022-02-11 00:50:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:52,881 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 8313 transitions. [2022-02-11 00:50:52,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:50:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 8313 transitions. [2022-02-11 00:50:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:52,884 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:52,884 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:52,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-02-11 00:50:53,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:53,085 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1534073149, now seen corresponding path program 129 times [2022-02-11 00:50:53,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:53,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095227302] [2022-02-11 00:50:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:53,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:53,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:53,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095227302] [2022-02-11 00:50:53,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095227302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:53,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412410570] [2022-02-11 00:50:53,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:53,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:53,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:53,311 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:53,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-11 00:50:53,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:50:53,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:53,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:50:53,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:53,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:53,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:53,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:53,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:53,672 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 33 treesize of output 21 [2022-02-11 00:50:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:53,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:54,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:54,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:54,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-02-11 00:50:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:54,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412410570] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:54,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:54,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:50:54,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638788161] [2022-02-11 00:50:54,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:54,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:50:54,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:50:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:54,186 INFO L87 Difference]: Start difference. First operand 2498 states and 8313 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:55,141 INFO L93 Difference]: Finished difference Result 2856 states and 9431 transitions. [2022-02-11 00:50:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:50:55,142 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:50:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:55,147 INFO L225 Difference]: With dead ends: 2856 [2022-02-11 00:50:55,147 INFO L226 Difference]: Without dead ends: 2850 [2022-02-11 00:50:55,147 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:50:55,147 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:55,147 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 110 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1389 Invalid, 0 Unknown, 418 Unchecked, 0.5s Time] [2022-02-11 00:50:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-02-11 00:50:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2500. [2022-02-11 00:50:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2499 states have (on average 3.3297318927571027) internal successors, (8321), 2499 states have internal predecessors, (8321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 8321 transitions. [2022-02-11 00:50:55,180 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 8321 transitions. Word has length 24 [2022-02-11 00:50:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:55,180 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 8321 transitions. [2022-02-11 00:50:55,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 8321 transitions. [2022-02-11 00:50:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:55,184 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:55,184 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:55,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-02-11 00:50:55,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-11 00:50:55,384 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1436105503, now seen corresponding path program 130 times [2022-02-11 00:50:55,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:55,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79774476] [2022-02-11 00:50:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:55,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:55,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:55,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79774476] [2022-02-11 00:50:55,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79774476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:55,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355835622] [2022-02-11 00:50:55,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:55,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:55,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:55,630 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:55,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-11 00:50:55,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:55,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:55,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:55,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:55,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:55,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:55,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:55,891 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 37 treesize of output 21 [2022-02-11 00:50:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:55,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:56,203 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:50:56,204 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 20 treesize of output 43 [2022-02-11 00:50:56,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:56,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:56,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:56,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:56,257 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 20 treesize of output 3 [2022-02-11 00:50:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:56,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355835622] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:56,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:56,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:50:56,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437629752] [2022-02-11 00:50:56,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:56,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:50:56,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:50:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:50:56,273 INFO L87 Difference]: Start difference. First operand 2500 states and 8321 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:57,355 INFO L93 Difference]: Finished difference Result 2894 states and 9561 transitions. [2022-02-11 00:50:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:50:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:50:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:57,361 INFO L225 Difference]: With dead ends: 2894 [2022-02-11 00:50:57,361 INFO L226 Difference]: Without dead ends: 2886 [2022-02-11 00:50:57,361 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:50:57,361 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 78 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:57,361 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 93 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1366 Invalid, 0 Unknown, 295 Unchecked, 0.5s Time] [2022-02-11 00:50:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-02-11 00:50:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2501. [2022-02-11 00:50:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 3.3304) internal successors, (8326), 2500 states have internal predecessors, (8326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 8326 transitions. [2022-02-11 00:50:57,403 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 8326 transitions. Word has length 24 [2022-02-11 00:50:57,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:57,403 INFO L470 AbstractCegarLoop]: Abstraction has 2501 states and 8326 transitions. [2022-02-11 00:50:57,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 8326 transitions. [2022-02-11 00:50:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:57,407 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:57,407 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:57,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-02-11 00:50:57,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-02-11 00:50:57,607 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2084000377, now seen corresponding path program 131 times [2022-02-11 00:50:57,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:57,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352430855] [2022-02-11 00:50:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:57,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:57,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352430855] [2022-02-11 00:50:57,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352430855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:57,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079349676] [2022-02-11 00:50:57,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:57,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:57,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:57,829 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:50:57,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-11 00:50:57,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:50:57,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:57,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:57,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:58,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:58,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:58,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:58,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:58,083 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 33 treesize of output 17 [2022-02-11 00:50:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:58,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:58,388 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:50:58,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:50:58,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:58,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:58,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:58,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:58,438 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 20 treesize of output 3 [2022-02-11 00:50:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:58,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079349676] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:58,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:58,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:50:58,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746683484] [2022-02-11 00:50:58,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:58,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:50:58,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:50:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:50:58,454 INFO L87 Difference]: Start difference. First operand 2501 states and 8326 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:59,661 INFO L93 Difference]: Finished difference Result 3110 states and 10102 transitions. [2022-02-11 00:50:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:50:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:50:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:59,667 INFO L225 Difference]: With dead ends: 3110 [2022-02-11 00:50:59,667 INFO L226 Difference]: Without dead ends: 3101 [2022-02-11 00:50:59,667 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:50:59,668 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 846 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:59,668 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 167 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1605 Invalid, 0 Unknown, 846 Unchecked, 0.6s Time] [2022-02-11 00:50:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2022-02-11 00:50:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2505. [2022-02-11 00:50:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2504 states have (on average 3.332667731629393) internal successors, (8345), 2504 states have internal predecessors, (8345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 8345 transitions. [2022-02-11 00:50:59,702 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 8345 transitions. Word has length 24 [2022-02-11 00:50:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:59,702 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 8345 transitions. [2022-02-11 00:50:59,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 8345 transitions. [2022-02-11 00:50:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:50:59,705 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:59,705 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:59,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-02-11 00:50:59,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-11 00:50:59,905 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:50:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1481789116, now seen corresponding path program 17 times [2022-02-11 00:50:59,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:59,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608314035] [2022-02-11 00:50:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:59,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:00,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:00,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608314035] [2022-02-11 00:51:00,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608314035] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:00,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388805932] [2022-02-11 00:51:00,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:00,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:00,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:00,126 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:00,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-11 00:51:00,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:51:00,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:00,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:00,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:00,385 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 37 treesize of output 21 [2022-02-11 00:51:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:00,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:00,692 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:51:00,692 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 20 treesize of output 43 [2022-02-11 00:51:00,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:00,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:00,745 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 20 treesize of output 3 [2022-02-11 00:51:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:00,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388805932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:00,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:00,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:51:00,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639691678] [2022-02-11 00:51:00,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:00,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:51:00,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:00,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:51:00,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:51:00,760 INFO L87 Difference]: Start difference. First operand 2505 states and 8345 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:01,876 INFO L93 Difference]: Finished difference Result 2907 states and 9603 transitions. [2022-02-11 00:51:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:51:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:51:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:01,882 INFO L225 Difference]: With dead ends: 2907 [2022-02-11 00:51:01,882 INFO L226 Difference]: Without dead ends: 2900 [2022-02-11 00:51:01,882 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:51:01,882 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 94 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:01,882 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 86 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1458 Invalid, 0 Unknown, 230 Unchecked, 0.6s Time] [2022-02-11 00:51:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2022-02-11 00:51:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2503. [2022-02-11 00:51:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 3.332933653077538) internal successors, (8339), 2502 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 8339 transitions. [2022-02-11 00:51:01,922 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 8339 transitions. Word has length 24 [2022-02-11 00:51:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:01,922 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 8339 transitions. [2022-02-11 00:51:01,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 8339 transitions. [2022-02-11 00:51:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:01,926 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:01,926 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:01,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-02-11 00:51:02,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-02-11 00:51:02,126 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:02,126 INFO L85 PathProgramCache]: Analyzing trace with hash 73429867, now seen corresponding path program 132 times [2022-02-11 00:51:02,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:02,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365070678] [2022-02-11 00:51:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:02,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:02,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:02,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365070678] [2022-02-11 00:51:02,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365070678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:02,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813580045] [2022-02-11 00:51:02,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:51:02,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:02,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:02,352 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:02,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-11 00:51:02,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:51:02,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:02,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:51:02,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:02,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:02,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:02,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:02,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:02,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-02-11 00:51:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:03,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:03,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:03,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:03,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:03,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:03,615 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 41 treesize of output 7 [2022-02-11 00:51:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:03,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813580045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:03,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:03,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:51:03,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212828382] [2022-02-11 00:51:03,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:03,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:51:03,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:51:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:51:03,647 INFO L87 Difference]: Start difference. First operand 2503 states and 8339 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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) [2022-02-11 00:51:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:05,585 INFO L93 Difference]: Finished difference Result 3159 states and 10415 transitions. [2022-02-11 00:51:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:51:05,585 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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 [2022-02-11 00:51:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:05,591 INFO L225 Difference]: With dead ends: 3159 [2022-02-11 00:51:05,592 INFO L226 Difference]: Without dead ends: 3151 [2022-02-11 00:51:05,592 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=343, Invalid=3947, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:51:05,592 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 143 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:05,592 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 123 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1279 Invalid, 0 Unknown, 615 Unchecked, 0.5s Time] [2022-02-11 00:51:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2022-02-11 00:51:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2503. [2022-02-11 00:51:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 3.332933653077538) internal successors, (8339), 2502 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 8339 transitions. [2022-02-11 00:51:05,628 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 8339 transitions. Word has length 24 [2022-02-11 00:51:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:05,629 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 8339 transitions. [2022-02-11 00:51:05,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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) [2022-02-11 00:51:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 8339 transitions. [2022-02-11 00:51:05,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:05,632 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:05,632 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:05,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-02-11 00:51:05,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-02-11 00:51:05,833 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2115913133, now seen corresponding path program 133 times [2022-02-11 00:51:05,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:05,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147365443] [2022-02-11 00:51:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:05,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:06,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:06,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147365443] [2022-02-11 00:51:06,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147365443] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:06,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032947285] [2022-02-11 00:51:06,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:51:06,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:06,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:06,069 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:06,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-11 00:51:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:06,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:06,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:06,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:06,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:06,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:06,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:06,351 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 33 treesize of output 17 [2022-02-11 00:51:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:06,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:06,663 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:51:06,664 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 20 treesize of output 43 [2022-02-11 00:51:06,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:06,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:06,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:06,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:06,705 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 20 treesize of output 3 [2022-02-11 00:51:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:06,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032947285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:06,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:06,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:51:06,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727021013] [2022-02-11 00:51:06,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:06,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:51:06,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:06,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:51:06,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:51:06,721 INFO L87 Difference]: Start difference. First operand 2503 states and 8339 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:08,038 INFO L93 Difference]: Finished difference Result 3031 states and 9878 transitions. [2022-02-11 00:51:08,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:51:08,039 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:51:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:08,044 INFO L225 Difference]: With dead ends: 3031 [2022-02-11 00:51:08,044 INFO L226 Difference]: Without dead ends: 3024 [2022-02-11 00:51:08,045 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:51:08,045 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:08,045 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 210 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1398 Invalid, 0 Unknown, 781 Unchecked, 0.6s Time] [2022-02-11 00:51:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-02-11 00:51:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2486. [2022-02-11 00:51:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 3.3356136820925553) internal successors, (8289), 2485 states have internal predecessors, (8289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 8289 transitions. [2022-02-11 00:51:08,086 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 8289 transitions. Word has length 24 [2022-02-11 00:51:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:08,086 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 8289 transitions. [2022-02-11 00:51:08,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 8289 transitions. [2022-02-11 00:51:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:08,089 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:08,089 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:08,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-02-11 00:51:08,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-02-11 00:51:08,290 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash -284422353, now seen corresponding path program 134 times [2022-02-11 00:51:08,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:08,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33011582] [2022-02-11 00:51:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:08,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:08,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:08,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33011582] [2022-02-11 00:51:08,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33011582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:08,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027872447] [2022-02-11 00:51:08,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:51:08,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:08,513 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:08,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-11 00:51:08,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:51:08,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:08,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:51:08,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:08,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:08,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:08,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:08,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:08,801 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:51:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:09,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:09,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:09,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:09,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:09,509 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 41 treesize of output 56 [2022-02-11 00:51:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:09,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027872447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:09,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:09,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:51:09,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760378473] [2022-02-11 00:51:09,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:09,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:51:09,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:09,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:51:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:51:09,663 INFO L87 Difference]: Start difference. First operand 2486 states and 8289 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:51:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:11,644 INFO L93 Difference]: Finished difference Result 3517 states and 11744 transitions. [2022-02-11 00:51:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:51:11,644 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 [2022-02-11 00:51:11,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:11,651 INFO L225 Difference]: With dead ends: 3517 [2022-02-11 00:51:11,652 INFO L226 Difference]: Without dead ends: 3513 [2022-02-11 00:51:11,652 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=323, Invalid=2869, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:51:11,652 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:11,652 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 249 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1110 Invalid, 0 Unknown, 785 Unchecked, 0.5s Time] [2022-02-11 00:51:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-02-11 00:51:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2498. [2022-02-11 00:51:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 3.3360032038446135) internal successors, (8330), 2497 states have internal predecessors, (8330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 8330 transitions. [2022-02-11 00:51:11,701 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 8330 transitions. Word has length 24 [2022-02-11 00:51:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:11,701 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 8330 transitions. [2022-02-11 00:51:11,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:51:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 8330 transitions. [2022-02-11 00:51:11,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:11,705 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:11,705 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:11,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-02-11 00:51:11,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:11,905 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:11,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:11,906 INFO L85 PathProgramCache]: Analyzing trace with hash 603081328, now seen corresponding path program 21 times [2022-02-11 00:51:11,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:11,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253010750] [2022-02-11 00:51:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:11,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:12,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:12,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253010750] [2022-02-11 00:51:12,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253010750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:12,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637824912] [2022-02-11 00:51:12,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:12,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:12,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:12,142 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:12,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-11 00:51:12,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:51:12,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:51:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:12,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:12,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:12,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:12,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:12,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:51:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:12,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:12,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:12,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:12,883 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 37 treesize of output 56 [2022-02-11 00:51:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:13,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637824912] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:13,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:13,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:51:13,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725568848] [2022-02-11 00:51:13,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:13,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:51:13,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:51:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:51:13,013 INFO L87 Difference]: Start difference. First operand 2498 states and 8330 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:51:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:15,471 INFO L93 Difference]: Finished difference Result 3311 states and 10477 transitions. [2022-02-11 00:51:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:51:15,471 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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 [2022-02-11 00:51:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:15,477 INFO L225 Difference]: With dead ends: 3311 [2022-02-11 00:51:15,477 INFO L226 Difference]: Without dead ends: 3279 [2022-02-11 00:51:15,477 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=442, Invalid=4250, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:51:15,477 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 341 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 3878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1622 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:15,477 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 243 Invalid, 3878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2170 Invalid, 0 Unknown, 1622 Unchecked, 1.0s Time] [2022-02-11 00:51:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2022-02-11 00:51:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2547. [2022-02-11 00:51:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 3.332678711704635) internal successors, (8485), 2546 states have internal predecessors, (8485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 8485 transitions. [2022-02-11 00:51:15,515 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 8485 transitions. Word has length 24 [2022-02-11 00:51:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:15,515 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 8485 transitions. [2022-02-11 00:51:15,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:51:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 8485 transitions. [2022-02-11 00:51:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:15,518 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:15,519 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:15,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:15,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-02-11 00:51:15,719 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash 713052612, now seen corresponding path program 18 times [2022-02-11 00:51:15,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:15,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072299878] [2022-02-11 00:51:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:15,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:15,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:15,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072299878] [2022-02-11 00:51:15,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072299878] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:15,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015892688] [2022-02-11 00:51:15,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:51:15,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:15,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:15,943 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:15,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-11 00:51:15,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:51:15,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:51:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:16,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:16,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:16,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:16,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:16,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:51:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:16,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:16,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:16,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:16,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:16,878 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 41 treesize of output 56 [2022-02-11 00:51:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:16,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015892688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:16,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:16,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:51:16,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038509219] [2022-02-11 00:51:16,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:16,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:51:16,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:16,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:51:16,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:51:16,996 INFO L87 Difference]: Start difference. First operand 2547 states and 8485 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-02-11 00:51:19,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:19,424 INFO L93 Difference]: Finished difference Result 3638 states and 12393 transitions. [2022-02-11 00:51:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:51:19,424 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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 [2022-02-11 00:51:19,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:19,431 INFO L225 Difference]: With dead ends: 3638 [2022-02-11 00:51:19,431 INFO L226 Difference]: Without dead ends: 3625 [2022-02-11 00:51:19,432 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=427, Invalid=3233, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:51:19,432 INFO L934 BasicCegarLoop]: 5 mSDtfsCounter, 165 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1486 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:19,432 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 94 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 996 Invalid, 0 Unknown, 1486 Unchecked, 0.4s Time] [2022-02-11 00:51:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2022-02-11 00:51:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 2574. [2022-02-11 00:51:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 2573 states have (on average 3.3416245627671977) internal successors, (8598), 2573 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 8598 transitions. [2022-02-11 00:51:19,471 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 8598 transitions. Word has length 24 [2022-02-11 00:51:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:19,471 INFO L470 AbstractCegarLoop]: Abstraction has 2574 states and 8598 transitions. [2022-02-11 00:51:19,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-02-11 00:51:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 8598 transitions. [2022-02-11 00:51:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:19,475 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:19,475 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:19,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:19,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:19,675 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:19,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1363030483, now seen corresponding path program 135 times [2022-02-11 00:51:19,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:19,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106032265] [2022-02-11 00:51:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:19,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:19,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:19,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106032265] [2022-02-11 00:51:19,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106032265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:19,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009837161] [2022-02-11 00:51:19,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:19,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:19,899 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:19,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-11 00:51:19,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:51:19,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:19,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:20,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:20,192 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 33 treesize of output 17 [2022-02-11 00:51:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:20,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:20,462 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:51:20,462 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 20 treesize of output 43 [2022-02-11 00:51:20,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:20,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:20,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:20,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:20,512 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 20 treesize of output 3 [2022-02-11 00:51:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:20,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009837161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:20,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:20,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:51:20,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799572622] [2022-02-11 00:51:20,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:20,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:51:20,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:20,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:51:20,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:51:20,527 INFO L87 Difference]: Start difference. First operand 2574 states and 8598 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:51:21,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:21,941 INFO L93 Difference]: Finished difference Result 3329 states and 10831 transitions. [2022-02-11 00:51:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:51:21,941 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-02-11 00:51:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:21,948 INFO L225 Difference]: With dead ends: 3329 [2022-02-11 00:51:21,948 INFO L226 Difference]: Without dead ends: 3319 [2022-02-11 00:51:21,948 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=280, Invalid=2072, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:51:21,948 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 154 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 689 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:21,948 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 255 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1763 Invalid, 0 Unknown, 689 Unchecked, 0.7s Time] [2022-02-11 00:51:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2022-02-11 00:51:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 2587. [2022-02-11 00:51:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 3.3422273781902554) internal successors, (8643), 2586 states have internal predecessors, (8643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8643 transitions. [2022-02-11 00:51:21,987 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8643 transitions. Word has length 24 [2022-02-11 00:51:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:21,987 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8643 transitions. [2022-02-11 00:51:21,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2022-02-11 00:51:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8643 transitions. [2022-02-11 00:51:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:21,990 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:21,990 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:22,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-02-11 00:51:22,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-02-11 00:51:22,191 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1170717186, now seen corresponding path program 19 times [2022-02-11 00:51:22,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:22,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239144901] [2022-02-11 00:51:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:22,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:22,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:22,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239144901] [2022-02-11 00:51:22,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239144901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:22,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246160506] [2022-02-11 00:51:22,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:51:22,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:22,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:22,414 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:22,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-11 00:51:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:22,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:22,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:22,685 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 37 treesize of output 21 [2022-02-11 00:51:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:22,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:23,005 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:51:23,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:51:23,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:23,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:23,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:23,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:23,059 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 20 treesize of output 3 [2022-02-11 00:51:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:23,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246160506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:23,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:23,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:51:23,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265835764] [2022-02-11 00:51:23,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:23,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:51:23,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:51:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:51:23,077 INFO L87 Difference]: Start difference. First operand 2587 states and 8643 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:24,388 INFO L93 Difference]: Finished difference Result 3170 states and 10315 transitions. [2022-02-11 00:51:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:51:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:51:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:24,394 INFO L225 Difference]: With dead ends: 3170 [2022-02-11 00:51:24,394 INFO L226 Difference]: Without dead ends: 3162 [2022-02-11 00:51:24,395 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:51:24,395 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:24,395 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1781 Invalid, 0 Unknown, 658 Unchecked, 0.7s Time] [2022-02-11 00:51:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-02-11 00:51:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2577. [2022-02-11 00:51:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 3.340062111801242) internal successors, (8604), 2576 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 8604 transitions. [2022-02-11 00:51:24,439 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 8604 transitions. Word has length 24 [2022-02-11 00:51:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:24,439 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 8604 transitions. [2022-02-11 00:51:24,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 8604 transitions. [2022-02-11 00:51:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:24,443 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:24,443 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:24,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:24,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:24,643 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1867982233, now seen corresponding path program 136 times [2022-02-11 00:51:24,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:24,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411750203] [2022-02-11 00:51:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:24,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:24,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:24,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411750203] [2022-02-11 00:51:24,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411750203] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:24,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997410197] [2022-02-11 00:51:24,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:51:24,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:24,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:24,874 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:24,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-11 00:51:24,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:51:24,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:24,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:25,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:25,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:25,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:25,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:51:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:25,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:25,452 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:51:25,452 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 20 treesize of output 43 [2022-02-11 00:51:25,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:25,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:25,502 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 20 treesize of output 3 [2022-02-11 00:51:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:25,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997410197] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:25,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:25,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:51:25,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968164384] [2022-02-11 00:51:25,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:25,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:51:25,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:25,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:51:25,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:51:25,518 INFO L87 Difference]: Start difference. First operand 2577 states and 8604 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:26,968 INFO L93 Difference]: Finished difference Result 3205 states and 10398 transitions. [2022-02-11 00:51:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:51:26,968 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:51:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:26,974 INFO L225 Difference]: With dead ends: 3205 [2022-02-11 00:51:26,974 INFO L226 Difference]: Without dead ends: 3196 [2022-02-11 00:51:26,975 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=200, Invalid=2056, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:51:26,975 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 180 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1029 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:26,975 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 173 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1655 Invalid, 0 Unknown, 1029 Unchecked, 0.7s Time] [2022-02-11 00:51:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2022-02-11 00:51:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2562. [2022-02-11 00:51:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2561 states have (on average 3.3389301054275675) internal successors, (8551), 2561 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 8551 transitions. [2022-02-11 00:51:27,012 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 8551 transitions. Word has length 24 [2022-02-11 00:51:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:27,012 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 8551 transitions. [2022-02-11 00:51:27,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 8551 transitions. [2022-02-11 00:51:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:27,016 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:27,016 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:27,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-02-11 00:51:27,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-02-11 00:51:27,216 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1738899514, now seen corresponding path program 20 times [2022-02-11 00:51:27,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:27,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549675365] [2022-02-11 00:51:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:27,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:27,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:27,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549675365] [2022-02-11 00:51:27,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549675365] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:27,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919380767] [2022-02-11 00:51:27,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:51:27,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:27,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:27,451 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:27,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-11 00:51:27,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:51:27,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:51:27,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:27,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:27,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:27,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:27,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:27,750 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:51:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:28,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:28,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:28,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:28,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:28,462 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 41 treesize of output 56 [2022-02-11 00:51:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:28,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919380767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:28,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:28,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:51:28,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557392092] [2022-02-11 00:51:28,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:28,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:51:28,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:51:28,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:51:28,545 INFO L87 Difference]: Start difference. First operand 2562 states and 8551 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:51:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:31,676 INFO L93 Difference]: Finished difference Result 3914 states and 13354 transitions. [2022-02-11 00:51:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:51:31,677 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 [2022-02-11 00:51:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:31,685 INFO L225 Difference]: With dead ends: 3914 [2022-02-11 00:51:31,685 INFO L226 Difference]: Without dead ends: 3907 [2022-02-11 00:51:31,685 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=571, Invalid=4121, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:51:31,685 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1270 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:31,685 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 189 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1038 Invalid, 0 Unknown, 1270 Unchecked, 0.5s Time] [2022-02-11 00:51:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-02-11 00:51:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2586. [2022-02-11 00:51:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 3.34468085106383) internal successors, (8646), 2585 states have internal predecessors, (8646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 8646 transitions. [2022-02-11 00:51:31,731 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 8646 transitions. Word has length 24 [2022-02-11 00:51:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:31,731 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 8646 transitions. [2022-02-11 00:51:31,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:51:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 8646 transitions. [2022-02-11 00:51:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:31,735 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:31,735 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:31,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-02-11 00:51:31,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:31,935 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:31,935 INFO L85 PathProgramCache]: Analyzing trace with hash 957867473, now seen corresponding path program 137 times [2022-02-11 00:51:31,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:31,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129541734] [2022-02-11 00:51:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:32,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:32,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129541734] [2022-02-11 00:51:32,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129541734] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:32,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24503122] [2022-02-11 00:51:32,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:32,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:32,185 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:32,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-11 00:51:32,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:51:32,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:32,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:51:32,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:32,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:32,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:32,450 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-02-11 00:51:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:32,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:33,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:33,252 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 37 treesize of output 7 [2022-02-11 00:51:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:33,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24503122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:33,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:33,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:51:33,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940444215] [2022-02-11 00:51:33,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:33,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:51:33,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:51:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:51:33,291 INFO L87 Difference]: Start difference. First operand 2586 states and 8646 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 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) [2022-02-11 00:51:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:34,191 INFO L93 Difference]: Finished difference Result 2691 states and 8950 transitions. [2022-02-11 00:51:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:51:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 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 24 [2022-02-11 00:51:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:34,197 INFO L225 Difference]: With dead ends: 2691 [2022-02-11 00:51:34,197 INFO L226 Difference]: Without dead ends: 2684 [2022-02-11 00:51:34,197 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=251, Invalid=2005, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:51:34,197 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:34,198 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 110 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 649 Invalid, 0 Unknown, 415 Unchecked, 0.2s Time] [2022-02-11 00:51:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2022-02-11 00:51:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2587. [2022-02-11 00:51:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 3.3437741686001545) internal successors, (8647), 2586 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8647 transitions. [2022-02-11 00:51:34,231 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8647 transitions. Word has length 24 [2022-02-11 00:51:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:34,231 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8647 transitions. [2022-02-11 00:51:34,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 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) [2022-02-11 00:51:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8647 transitions. [2022-02-11 00:51:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:34,235 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:34,235 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:34,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-02-11 00:51:34,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-02-11 00:51:34,435 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1861458294, now seen corresponding path program 22 times [2022-02-11 00:51:34,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:34,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707278846] [2022-02-11 00:51:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:34,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:34,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:34,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707278846] [2022-02-11 00:51:34,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707278846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:34,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011647816] [2022-02-11 00:51:34,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:51:34,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:34,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:34,672 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:34,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-11 00:51:34,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:51:34,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:34,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:34,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:34,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:34,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:34,891 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 34 treesize of output 20 [2022-02-11 00:51:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:34,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:35,199 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:51:35,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:51:35,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:35,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:35,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:35,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:35,249 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 20 treesize of output 3 [2022-02-11 00:51:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:35,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011647816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:35,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:35,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:51:35,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606565118] [2022-02-11 00:51:35,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:35,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:51:35,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:51:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:51:35,276 INFO L87 Difference]: Start difference. First operand 2587 states and 8647 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:51:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:36,293 INFO L93 Difference]: Finished difference Result 2853 states and 9514 transitions. [2022-02-11 00:51:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:51:36,293 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:51:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:36,299 INFO L225 Difference]: With dead ends: 2853 [2022-02-11 00:51:36,299 INFO L226 Difference]: Without dead ends: 2845 [2022-02-11 00:51:36,299 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:51:36,299 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:36,300 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 78 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1476 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2022-02-11 00:51:36,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2022-02-11 00:51:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2579. [2022-02-11 00:51:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2578 states have (on average 3.342901474010861) internal successors, (8618), 2578 states have internal predecessors, (8618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 8618 transitions. [2022-02-11 00:51:36,336 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 8618 transitions. Word has length 24 [2022-02-11 00:51:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:36,336 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 8618 transitions. [2022-02-11 00:51:36,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:51:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 8618 transitions. [2022-02-11 00:51:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:36,340 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:36,340 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:36,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:36,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-02-11 00:51:36,541 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:36,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1245375153, now seen corresponding path program 138 times [2022-02-11 00:51:36,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:36,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392012879] [2022-02-11 00:51:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:36,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:36,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:36,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392012879] [2022-02-11 00:51:36,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392012879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:36,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897296598] [2022-02-11 00:51:36,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:51:36,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:36,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:36,790 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:36,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-11 00:51:36,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:51:36,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:36,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:51:36,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:37,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:37,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:37,070 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-02-11 00:51:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:37,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:37,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:37,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:37,689 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 38 treesize of output 55 [2022-02-11 00:51:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:37,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897296598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:37,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:37,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:51:37,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696375187] [2022-02-11 00:51:37,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:37,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:51:37,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:51:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:51:37,788 INFO L87 Difference]: Start difference. First operand 2579 states and 8618 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:51:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:39,446 INFO L93 Difference]: Finished difference Result 2959 states and 9749 transitions. [2022-02-11 00:51:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:51:39,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 [2022-02-11 00:51:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:39,452 INFO L225 Difference]: With dead ends: 2959 [2022-02-11 00:51:39,452 INFO L226 Difference]: Without dead ends: 2948 [2022-02-11 00:51:39,452 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:51:39,452 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:39,452 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 139 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2008 Invalid, 0 Unknown, 598 Unchecked, 0.8s Time] [2022-02-11 00:51:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2022-02-11 00:51:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2588. [2022-02-11 00:51:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2587 states have (on average 3.342481638964051) internal successors, (8647), 2587 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 8647 transitions. [2022-02-11 00:51:39,486 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 8647 transitions. Word has length 24 [2022-02-11 00:51:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:39,486 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 8647 transitions. [2022-02-11 00:51:39,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:51:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 8647 transitions. [2022-02-11 00:51:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:39,489 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:39,490 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:39,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-02-11 00:51:39,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:39,690 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash 436461757, now seen corresponding path program 139 times [2022-02-11 00:51:39,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:39,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409792496] [2022-02-11 00:51:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:39,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:39,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409792496] [2022-02-11 00:51:39,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409792496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:39,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008560292] [2022-02-11 00:51:39,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:51:39,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:39,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:39,938 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:39,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-11 00:51:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:39,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:40,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:40,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:40,159 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 34 treesize of output 20 [2022-02-11 00:51:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:40,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:40,469 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:51:40,469 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 20 treesize of output 43 [2022-02-11 00:51:40,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:40,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:40,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:51:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:40,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008560292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:40,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:40,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:51:40,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595172937] [2022-02-11 00:51:40,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:40,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:51:40,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:40,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:51:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:51:40,545 INFO L87 Difference]: Start difference. First operand 2588 states and 8647 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:51:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:41,517 INFO L93 Difference]: Finished difference Result 2858 states and 9526 transitions. [2022-02-11 00:51:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:51:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:51:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:41,522 INFO L225 Difference]: With dead ends: 2858 [2022-02-11 00:51:41,522 INFO L226 Difference]: Without dead ends: 2850 [2022-02-11 00:51:41,523 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:51:41,523 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:41,523 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 78 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1461 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2022-02-11 00:51:41,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-02-11 00:51:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2587. [2022-02-11 00:51:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 3.3445475638051043) internal successors, (8649), 2586 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8649 transitions. [2022-02-11 00:51:41,555 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8649 transitions. Word has length 24 [2022-02-11 00:51:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:41,556 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8649 transitions. [2022-02-11 00:51:41,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:51:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8649 transitions. [2022-02-11 00:51:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:41,559 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:41,559 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:41,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:41,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:41,759 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash -836471951, now seen corresponding path program 140 times [2022-02-11 00:51:41,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:41,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604991667] [2022-02-11 00:51:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:41,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:42,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:42,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604991667] [2022-02-11 00:51:42,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604991667] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:42,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893257632] [2022-02-11 00:51:42,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:51:42,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:42,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:42,024 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:42,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-11 00:51:42,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:51:42,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:42,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:51:42,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:42,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:42,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:42,293 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:51:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:42,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:42,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:42,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:42,907 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 38 treesize of output 55 [2022-02-11 00:51:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:43,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893257632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:43,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:43,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:51:43,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173618124] [2022-02-11 00:51:43,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:43,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:51:43,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:51:43,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:51:43,011 INFO L87 Difference]: Start difference. First operand 2587 states and 8649 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:51:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:45,056 INFO L93 Difference]: Finished difference Result 2909 states and 9613 transitions. [2022-02-11 00:51:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:51:45,056 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 [2022-02-11 00:51:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:45,062 INFO L225 Difference]: With dead ends: 2909 [2022-02-11 00:51:45,062 INFO L226 Difference]: Without dead ends: 2879 [2022-02-11 00:51:45,062 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:51:45,062 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:45,062 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 155 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2143 Invalid, 0 Unknown, 497 Unchecked, 0.9s Time] [2022-02-11 00:51:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-02-11 00:51:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2584. [2022-02-11 00:51:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 2583 states have (on average 3.3441734417344176) internal successors, (8638), 2583 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 8638 transitions. [2022-02-11 00:51:45,099 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 8638 transitions. Word has length 24 [2022-02-11 00:51:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:45,100 INFO L470 AbstractCegarLoop]: Abstraction has 2584 states and 8638 transitions. [2022-02-11 00:51:45,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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) [2022-02-11 00:51:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 8638 transitions. [2022-02-11 00:51:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:45,104 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:45,104 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:45,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-02-11 00:51:45,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-02-11 00:51:45,304 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1085292758, now seen corresponding path program 23 times [2022-02-11 00:51:45,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:45,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141029429] [2022-02-11 00:51:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:45,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:45,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141029429] [2022-02-11 00:51:45,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141029429] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:45,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386862106] [2022-02-11 00:51:45,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:45,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:45,560 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:45,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-11 00:51:45,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:51:45,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:45,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:45,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:45,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:45,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:45,823 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 33 treesize of output 17 [2022-02-11 00:51:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:45,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:46,121 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:51:46,121 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 20 treesize of output 43 [2022-02-11 00:51:46,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:46,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:46,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:46,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:46,157 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 20 treesize of output 3 [2022-02-11 00:51:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:46,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386862106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:46,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:46,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:51:46,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587171426] [2022-02-11 00:51:46,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:46,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:51:46,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:46,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:51:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:51:46,173 INFO L87 Difference]: Start difference. First operand 2584 states and 8638 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:51:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:47,528 INFO L93 Difference]: Finished difference Result 2900 states and 9639 transitions. [2022-02-11 00:51:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:51:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:51:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:47,534 INFO L225 Difference]: With dead ends: 2900 [2022-02-11 00:51:47,534 INFO L226 Difference]: Without dead ends: 2892 [2022-02-11 00:51:47,534 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:51:47,534 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:47,534 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 169 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1459 Invalid, 0 Unknown, 288 Unchecked, 0.6s Time] [2022-02-11 00:51:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2022-02-11 00:51:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2594. [2022-02-11 00:51:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.34631700732742) internal successors, (8677), 2593 states have internal predecessors, (8677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 8677 transitions. [2022-02-11 00:51:47,582 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 8677 transitions. Word has length 24 [2022-02-11 00:51:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:47,582 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 8677 transitions. [2022-02-11 00:51:47,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:51:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 8677 transitions. [2022-02-11 00:51:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:47,585 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:47,585 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:47,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-02-11 00:51:47,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-02-11 00:51:47,786 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1238024875, now seen corresponding path program 141 times [2022-02-11 00:51:47,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:47,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415021859] [2022-02-11 00:51:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:48,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:48,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415021859] [2022-02-11 00:51:48,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415021859] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:48,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980636257] [2022-02-11 00:51:48,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:48,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:48,035 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:48,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-11 00:51:48,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:51:48,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:48,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:48,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:48,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:48,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:48,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 56 [2022-02-11 00:51:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:48,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:49,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:49,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:49,052 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 46 treesize of output 9 [2022-02-11 00:51:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:49,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980636257] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:49,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:49,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-11 00:51:49,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57423565] [2022-02-11 00:51:49,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:49,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:51:49,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:49,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:51:49,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:51:49,083 INFO L87 Difference]: Start difference. First operand 2594 states and 8677 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 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) [2022-02-11 00:51:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:52,758 INFO L93 Difference]: Finished difference Result 3381 states and 11015 transitions. [2022-02-11 00:51:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 00:51:52,758 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 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 24 [2022-02-11 00:51:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:52,764 INFO L225 Difference]: With dead ends: 3381 [2022-02-11 00:51:52,764 INFO L226 Difference]: Without dead ends: 3357 [2022-02-11 00:51:52,764 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=766, Invalid=6890, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 00:51:52,765 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 351 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 818 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:52,765 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 115 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2044 Invalid, 0 Unknown, 818 Unchecked, 1.0s Time] [2022-02-11 00:51:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2022-02-11 00:51:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2550. [2022-02-11 00:51:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.3428795606120048) internal successors, (8521), 2549 states have internal predecessors, (8521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8521 transitions. [2022-02-11 00:51:52,800 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8521 transitions. Word has length 24 [2022-02-11 00:51:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:52,800 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 8521 transitions. [2022-02-11 00:51:52,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 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) [2022-02-11 00:51:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8521 transitions. [2022-02-11 00:51:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:52,803 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:52,803 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:52,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-02-11 00:51:53,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2022-02-11 00:51:53,004 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:53,004 INFO L85 PathProgramCache]: Analyzing trace with hash -525329485, now seen corresponding path program 142 times [2022-02-11 00:51:53,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:53,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034361766] [2022-02-11 00:51:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:53,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:53,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:53,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034361766] [2022-02-11 00:51:53,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034361766] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:53,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677471162] [2022-02-11 00:51:53,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:51:53,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:53,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:53,248 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:53,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-11 00:51:53,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:51:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:53,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:53,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:53,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:53,474 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 34 treesize of output 20 [2022-02-11 00:51:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:53,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:53,786 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:51:53,786 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 20 treesize of output 43 [2022-02-11 00:51:53,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:53,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:53,838 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 20 treesize of output 3 [2022-02-11 00:51:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:53,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677471162] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:53,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:53,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:51:53,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435467235] [2022-02-11 00:51:53,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:53,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:51:53,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:51:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:51:53,854 INFO L87 Difference]: Start difference. First operand 2550 states and 8521 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-02-11 00:51:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:55,330 INFO L93 Difference]: Finished difference Result 2906 states and 9658 transitions. [2022-02-11 00:51:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:51:55,330 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 [2022-02-11 00:51:55,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:55,335 INFO L225 Difference]: With dead ends: 2906 [2022-02-11 00:51:55,335 INFO L226 Difference]: Without dead ends: 2887 [2022-02-11 00:51:55,336 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=2550, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:51:55,336 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 153 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:55,336 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 88 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1369 Invalid, 0 Unknown, 230 Unchecked, 0.6s Time] [2022-02-11 00:51:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-02-11 00:51:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2563. [2022-02-11 00:51:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 3.3454332552693207) internal successors, (8571), 2562 states have internal predecessors, (8571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 8571 transitions. [2022-02-11 00:51:55,368 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 8571 transitions. Word has length 24 [2022-02-11 00:51:55,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:55,369 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 8571 transitions. [2022-02-11 00:51:55,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-02-11 00:51:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 8571 transitions. [2022-02-11 00:51:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:51:55,372 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:55,372 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:55,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-02-11 00:51:55,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:55,572 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:51:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:55,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1646928077, now seen corresponding path program 143 times [2022-02-11 00:51:55,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:55,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84775164] [2022-02-11 00:51:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:55,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:55,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:55,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84775164] [2022-02-11 00:51:55,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84775164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:55,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358075181] [2022-02-11 00:51:55,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:55,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:55,808 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:51:55,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-11 00:51:55,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:51:55,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:51:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:56,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:56,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:56,050 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 30 treesize of output 16 [2022-02-11 00:51:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:56,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:56,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:56,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:56,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:56,404 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 20 treesize of output 39 [2022-02-11 00:51:56,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:56,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:56,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:56,423 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 20 treesize of output 3 [2022-02-11 00:51:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:56,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358075181] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:56,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:56,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:51:56,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812523691] [2022-02-11 00:51:56,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:56,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:51:56,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:51:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:51:56,461 INFO L87 Difference]: Start difference. First operand 2563 states and 8571 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:03,067 INFO L93 Difference]: Finished difference Result 3604 states and 11373 transitions. [2022-02-11 00:52:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-11 00:52:03,068 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:52:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:03,074 INFO L225 Difference]: With dead ends: 3604 [2022-02-11 00:52:03,074 INFO L226 Difference]: Without dead ends: 3544 [2022-02-11 00:52:03,075 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4346 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1240, Invalid=12332, Unknown=0, NotChecked=0, Total=13572 [2022-02-11 00:52:03,075 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 467 mSDsluCounter, 3346 mSDsCounter, 0 mSdLazyCounter, 6540 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 6728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 6540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:03,075 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 522 Invalid, 6728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 6540 Invalid, 0 Unknown, 32 Unchecked, 2.7s Time] [2022-02-11 00:52:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-02-11 00:52:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 2525. [2022-02-11 00:52:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2525 states, 2524 states have (on average 3.340729001584786) internal successors, (8432), 2524 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2525 states to 2525 states and 8432 transitions. [2022-02-11 00:52:03,128 INFO L78 Accepts]: Start accepts. Automaton has 2525 states and 8432 transitions. Word has length 24 [2022-02-11 00:52:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:03,128 INFO L470 AbstractCegarLoop]: Abstraction has 2525 states and 8432 transitions. [2022-02-11 00:52:03,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2525 states and 8432 transitions. [2022-02-11 00:52:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:03,131 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:03,131 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:03,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-02-11 00:52:03,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2022-02-11 00:52:03,332 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1367037485, now seen corresponding path program 144 times [2022-02-11 00:52:03,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:03,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17664540] [2022-02-11 00:52:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:03,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:03,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:03,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17664540] [2022-02-11 00:52:03,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17664540] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:03,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472508537] [2022-02-11 00:52:03,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:52:03,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:03,595 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:03,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-11 00:52:03,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:52:03,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:03,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:52:03,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:03,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:03,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:03,875 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:52:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:04,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:04,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:04,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:04,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:04,615 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 42 treesize of output 57 [2022-02-11 00:52:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:04,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472508537] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:04,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:04,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:52:04,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764270986] [2022-02-11 00:52:04,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:04,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:04,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:04,705 INFO L87 Difference]: Start difference. First operand 2525 states and 8432 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:52:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:06,768 INFO L93 Difference]: Finished difference Result 3768 states and 12835 transitions. [2022-02-11 00:52:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:52:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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 [2022-02-11 00:52:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:06,776 INFO L225 Difference]: With dead ends: 3768 [2022-02-11 00:52:06,776 INFO L226 Difference]: Without dead ends: 3748 [2022-02-11 00:52:06,777 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=436, Invalid=3724, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:52:06,777 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1245 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:06,777 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 203 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1634 Invalid, 0 Unknown, 1245 Unchecked, 0.7s Time] [2022-02-11 00:52:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-02-11 00:52:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 2537. [2022-02-11 00:52:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 3.345031545741325) internal successors, (8483), 2536 states have internal predecessors, (8483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 8483 transitions. [2022-02-11 00:52:06,824 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 8483 transitions. Word has length 24 [2022-02-11 00:52:06,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:06,824 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 8483 transitions. [2022-02-11 00:52:06,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:52:06,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 8483 transitions. [2022-02-11 00:52:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:06,828 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:06,828 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:06,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-02-11 00:52:07,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-02-11 00:52:07,031 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:07,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1427388839, now seen corresponding path program 145 times [2022-02-11 00:52:07,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:07,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929826004] [2022-02-11 00:52:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:07,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:07,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:07,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929826004] [2022-02-11 00:52:07,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929826004] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:07,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925537508] [2022-02-11 00:52:07,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:07,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:07,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:07,251 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:07,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-11 00:52:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:07,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:07,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:07,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:07,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:07,475 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 33 treesize of output 17 [2022-02-11 00:52:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:07,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:07,777 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:07,778 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 20 treesize of output 43 [2022-02-11 00:52:07,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:07,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:07,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:07,828 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 20 treesize of output 3 [2022-02-11 00:52:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:07,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925537508] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:07,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:07,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:52:07,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325411908] [2022-02-11 00:52:07,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:07,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:52:07,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:52:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:52:07,844 INFO L87 Difference]: Start difference. First operand 2537 states and 8483 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 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) [2022-02-11 00:52:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:08,725 INFO L93 Difference]: Finished difference Result 2868 states and 9604 transitions. [2022-02-11 00:52:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:52:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 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 [2022-02-11 00:52:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:08,730 INFO L225 Difference]: With dead ends: 2868 [2022-02-11 00:52:08,730 INFO L226 Difference]: Without dead ends: 2864 [2022-02-11 00:52:08,731 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:52:08,731 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:08,731 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 99 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1058 Invalid, 0 Unknown, 218 Unchecked, 0.4s Time] [2022-02-11 00:52:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2022-02-11 00:52:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2570. [2022-02-11 00:52:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 3.3588945114830673) internal successors, (8629), 2569 states have internal predecessors, (8629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 8629 transitions. [2022-02-11 00:52:08,767 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 8629 transitions. Word has length 24 [2022-02-11 00:52:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:08,767 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 8629 transitions. [2022-02-11 00:52:08,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 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) [2022-02-11 00:52:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 8629 transitions. [2022-02-11 00:52:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:08,771 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:08,771 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:08,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-02-11 00:52:08,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-02-11 00:52:08,971 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:08,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1456017990, now seen corresponding path program 24 times [2022-02-11 00:52:08,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:08,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58171224] [2022-02-11 00:52:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:09,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:09,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58171224] [2022-02-11 00:52:09,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58171224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:09,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312555208] [2022-02-11 00:52:09,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:52:09,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:09,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:09,199 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:09,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-11 00:52:09,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:52:09,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:09,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:52:09,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:09,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:09,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:09,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:09,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:09,451 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:52:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:09,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:10,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:10,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:10,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:10,112 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 42 treesize of output 57 [2022-02-11 00:52:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:10,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312555208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:10,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:10,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:52:10,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113430386] [2022-02-11 00:52:10,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:10,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:10,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:10,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:10,259 INFO L87 Difference]: Start difference. First operand 2570 states and 8629 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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) [2022-02-11 00:52:11,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:11,070 INFO L93 Difference]: Finished difference Result 2899 states and 9820 transitions. [2022-02-11 00:52:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:52:11,070 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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 [2022-02-11 00:52:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:11,076 INFO L225 Difference]: With dead ends: 2899 [2022-02-11 00:52:11,076 INFO L226 Difference]: Without dead ends: 2893 [2022-02-11 00:52:11,076 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:52:11,076 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:11,076 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 87 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 582 Invalid, 0 Unknown, 310 Unchecked, 0.2s Time] [2022-02-11 00:52:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2022-02-11 00:52:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2582. [2022-02-11 00:52:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2582 states, 2581 states have (on average 3.3607129019759783) internal successors, (8674), 2581 states have internal predecessors, (8674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 8674 transitions. [2022-02-11 00:52:11,113 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 8674 transitions. Word has length 24 [2022-02-11 00:52:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:11,113 INFO L470 AbstractCegarLoop]: Abstraction has 2582 states and 8674 transitions. [2022-02-11 00:52:11,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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) [2022-02-11 00:52:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 8674 transitions. [2022-02-11 00:52:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:11,117 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:11,117 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:11,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:11,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-02-11 00:52:11,318 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:11,318 INFO L85 PathProgramCache]: Analyzing trace with hash -380065624, now seen corresponding path program 21 times [2022-02-11 00:52:11,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:11,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433290669] [2022-02-11 00:52:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:11,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:11,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:11,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433290669] [2022-02-11 00:52:11,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433290669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:11,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227692346] [2022-02-11 00:52:11,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:52:11,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:11,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:11,541 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:11,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-11 00:52:11,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:52:11,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:11,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:11,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:11,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:11,796 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 39 treesize of output 61 [2022-02-11 00:52:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:12,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:12,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:12,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:12,456 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 45 treesize of output 7 [2022-02-11 00:52:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:12,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227692346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:12,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:12,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-11 00:52:12,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138209912] [2022-02-11 00:52:12,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:12,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:12,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:12,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:12,485 INFO L87 Difference]: Start difference. First operand 2582 states and 8674 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:15,997 INFO L93 Difference]: Finished difference Result 3767 states and 12249 transitions. [2022-02-11 00:52:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 00:52:15,997 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:52:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:16,003 INFO L225 Difference]: With dead ends: 3767 [2022-02-11 00:52:16,004 INFO L226 Difference]: Without dead ends: 3741 [2022-02-11 00:52:16,004 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:52:16,004 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 319 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1004 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:16,004 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 177 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2337 Invalid, 0 Unknown, 1004 Unchecked, 1.1s Time] [2022-02-11 00:52:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2022-02-11 00:52:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 2620. [2022-02-11 00:52:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 3.3680794196258113) internal successors, (8821), 2619 states have internal predecessors, (8821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 8821 transitions. [2022-02-11 00:52:16,043 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 8821 transitions. Word has length 24 [2022-02-11 00:52:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:16,043 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 8821 transitions. [2022-02-11 00:52:16,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 8821 transitions. [2022-02-11 00:52:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:16,047 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:16,047 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:16,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-02-11 00:52:16,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:16,247 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2133522032, now seen corresponding path program 25 times [2022-02-11 00:52:16,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:16,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305386414] [2022-02-11 00:52:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:16,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:16,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:16,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305386414] [2022-02-11 00:52:16,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305386414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:16,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951890525] [2022-02-11 00:52:16,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:16,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:16,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:16,463 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:16,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-11 00:52:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:16,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:16,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:16,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-11 00:52:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:16,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:16,964 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:16,965 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 20 treesize of output 43 [2022-02-11 00:52:17,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:17,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:17,015 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 20 treesize of output 3 [2022-02-11 00:52:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:17,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951890525] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:17,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:17,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-02-11 00:52:17,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627192256] [2022-02-11 00:52:17,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:17,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:52:17,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:17,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:52:17,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:52:17,031 INFO L87 Difference]: Start difference. First operand 2620 states and 8821 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:18,331 INFO L93 Difference]: Finished difference Result 3004 states and 10039 transitions. [2022-02-11 00:52:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:52:18,331 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:52:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:18,337 INFO L225 Difference]: With dead ends: 3004 [2022-02-11 00:52:18,337 INFO L226 Difference]: Without dead ends: 2989 [2022-02-11 00:52:18,337 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:52:18,337 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 161 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:18,338 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 71 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1278 Invalid, 0 Unknown, 388 Unchecked, 0.5s Time] [2022-02-11 00:52:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-02-11 00:52:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2633. [2022-02-11 00:52:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2632 states have (on average 3.367401215805471) internal successors, (8863), 2632 states have internal predecessors, (8863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 8863 transitions. [2022-02-11 00:52:18,372 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 8863 transitions. Word has length 24 [2022-02-11 00:52:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:18,372 INFO L470 AbstractCegarLoop]: Abstraction has 2633 states and 8863 transitions. [2022-02-11 00:52:18,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:18,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 8863 transitions. [2022-02-11 00:52:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:18,376 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:18,376 INFO L515 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] [2022-02-11 00:52:18,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:18,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:18,576 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:18,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1636225050, now seen corresponding path program 1 times [2022-02-11 00:52:18,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:18,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333991084] [2022-02-11 00:52:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:18,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:18,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:18,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333991084] [2022-02-11 00:52:18,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333991084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:18,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486910211] [2022-02-11 00:52:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:18,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:18,763 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:18,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-11 00:52:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:18,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:19,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:19,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:19,043 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 37 treesize of output 21 [2022-02-11 00:52:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:19,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:19,335 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:19,336 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 20 treesize of output 43 [2022-02-11 00:52:19,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:19,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:19,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:19,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:19,381 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 20 treesize of output 3 [2022-02-11 00:52:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:19,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486910211] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:19,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:19,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:52:19,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546474907] [2022-02-11 00:52:19,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:19,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:52:19,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:52:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:52:19,397 INFO L87 Difference]: Start difference. First operand 2633 states and 8863 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:20,974 INFO L93 Difference]: Finished difference Result 3345 states and 11076 transitions. [2022-02-11 00:52:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:52:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:52:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:20,981 INFO L225 Difference]: With dead ends: 3345 [2022-02-11 00:52:20,981 INFO L226 Difference]: Without dead ends: 3339 [2022-02-11 00:52:20,981 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=2493, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:52:20,982 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 168 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 657 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:20,982 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 206 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1977 Invalid, 0 Unknown, 657 Unchecked, 0.7s Time] [2022-02-11 00:52:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-02-11 00:52:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2651. [2022-02-11 00:52:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 2650 states have (on average 3.361509433962264) internal successors, (8908), 2650 states have internal predecessors, (8908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 8908 transitions. [2022-02-11 00:52:21,032 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 8908 transitions. Word has length 24 [2022-02-11 00:52:21,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:21,032 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 8908 transitions. [2022-02-11 00:52:21,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:21,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 8908 transitions. [2022-02-11 00:52:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:21,035 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:21,036 INFO L515 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] [2022-02-11 00:52:21,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-02-11 00:52:21,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-02-11 00:52:21,236 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:21,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:21,236 INFO L85 PathProgramCache]: Analyzing trace with hash -517823038, now seen corresponding path program 2 times [2022-02-11 00:52:21,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:21,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127835543] [2022-02-11 00:52:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:21,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:21,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:21,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127835543] [2022-02-11 00:52:21,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127835543] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:21,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286424328] [2022-02-11 00:52:21,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:52:21,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:21,424 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:21,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-11 00:52:21,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:52:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:52:21,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:21,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:21,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:21,921 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 29 treesize of output 17 [2022-02-11 00:52:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:21,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:22,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:22,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:22,331 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 37 treesize of output 56 [2022-02-11 00:52:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:22,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286424328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:22,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:22,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-02-11 00:52:22,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631186377] [2022-02-11 00:52:22,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:22,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:52:22,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:52:22,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:52:22,410 INFO L87 Difference]: Start difference. First operand 2651 states and 8908 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:52:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:24,007 INFO L93 Difference]: Finished difference Result 3376 states and 11002 transitions. [2022-02-11 00:52:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:52:24,007 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:52:24,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:24,014 INFO L225 Difference]: With dead ends: 3376 [2022-02-11 00:52:24,014 INFO L226 Difference]: Without dead ends: 3352 [2022-02-11 00:52:24,014 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:52:24,015 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 175 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 634 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:24,015 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 332 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1501 Invalid, 0 Unknown, 634 Unchecked, 0.6s Time] [2022-02-11 00:52:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2022-02-11 00:52:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2676. [2022-02-11 00:52:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 3.3517757009345797) internal successors, (8966), 2675 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 8966 transitions. [2022-02-11 00:52:24,056 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 8966 transitions. Word has length 24 [2022-02-11 00:52:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:24,056 INFO L470 AbstractCegarLoop]: Abstraction has 2676 states and 8966 transitions. [2022-02-11 00:52:24,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:52:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 8966 transitions. [2022-02-11 00:52:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:24,060 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:24,060 INFO L515 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] [2022-02-11 00:52:24,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-02-11 00:52:24,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-02-11 00:52:24,260 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:24,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1782268612, now seen corresponding path program 3 times [2022-02-11 00:52:24,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:24,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006905901] [2022-02-11 00:52:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:24,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:24,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:24,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006905901] [2022-02-11 00:52:24,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006905901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:24,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043177929] [2022-02-11 00:52:24,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:52:24,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:24,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:24,459 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:24,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-11 00:52:24,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:52:24,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:24,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:52:24,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:24,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:24,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:24,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:24,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:24,819 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:52:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:24,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:25,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:25,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:25,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:25,469 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 41 treesize of output 56 [2022-02-11 00:52:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:25,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043177929] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:25,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:25,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-02-11 00:52:25,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981459827] [2022-02-11 00:52:25,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:25,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:25,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:25,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:25,544 INFO L87 Difference]: Start difference. First operand 2676 states and 8966 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:52:28,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:28,141 INFO L93 Difference]: Finished difference Result 4696 states and 15925 transitions. [2022-02-11 00:52:28,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 00:52:28,141 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:52:28,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:28,150 INFO L225 Difference]: With dead ends: 4696 [2022-02-11 00:52:28,150 INFO L226 Difference]: Without dead ends: 4691 [2022-02-11 00:52:28,151 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=561, Invalid=4841, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:52:28,151 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2078 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:28,151 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 228 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 859 Invalid, 0 Unknown, 2078 Unchecked, 0.4s Time] [2022-02-11 00:52:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-02-11 00:52:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 2706. [2022-02-11 00:52:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 2705 states have (on average 3.343438077634011) internal successors, (9044), 2705 states have internal predecessors, (9044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 9044 transitions. [2022-02-11 00:52:28,210 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 9044 transitions. Word has length 24 [2022-02-11 00:52:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:28,210 INFO L470 AbstractCegarLoop]: Abstraction has 2706 states and 9044 transitions. [2022-02-11 00:52:28,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:52:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 9044 transitions. [2022-02-11 00:52:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:28,214 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:28,214 INFO L515 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] [2022-02-11 00:52:28,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:28,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:28,426 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash 857387454, now seen corresponding path program 4 times [2022-02-11 00:52:28,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:28,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807630379] [2022-02-11 00:52:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:28,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:28,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:28,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807630379] [2022-02-11 00:52:28,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807630379] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:28,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203896184] [2022-02-11 00:52:28,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:52:28,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:28,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:28,611 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:28,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-11 00:52:28,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:52:28,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:28,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:28,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:28,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:28,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:28,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:28,891 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 33 treesize of output 17 [2022-02-11 00:52:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:28,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:29,174 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:29,174 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 20 treesize of output 43 [2022-02-11 00:52:29,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:29,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:29,226 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 20 treesize of output 3 [2022-02-11 00:52:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:29,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203896184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:29,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:29,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:52:29,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138086603] [2022-02-11 00:52:29,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:29,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:52:29,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:29,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:52:29,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:52:29,242 INFO L87 Difference]: Start difference. First operand 2706 states and 9044 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:30,382 INFO L93 Difference]: Finished difference Result 3335 states and 10880 transitions. [2022-02-11 00:52:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:52:30,383 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:52:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:30,389 INFO L225 Difference]: With dead ends: 3335 [2022-02-11 00:52:30,389 INFO L226 Difference]: Without dead ends: 3331 [2022-02-11 00:52:30,389 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=2135, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:52:30,389 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:30,389 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 258 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1552 Invalid, 0 Unknown, 597 Unchecked, 0.6s Time] [2022-02-11 00:52:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2022-02-11 00:52:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 2695. [2022-02-11 00:52:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.3496659242761693) internal successors, (9024), 2694 states have internal predecessors, (9024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9024 transitions. [2022-02-11 00:52:30,431 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9024 transitions. Word has length 24 [2022-02-11 00:52:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:30,431 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9024 transitions. [2022-02-11 00:52:30,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9024 transitions. [2022-02-11 00:52:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:30,435 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:30,435 INFO L515 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] [2022-02-11 00:52:30,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:30,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:30,636 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash -735920548, now seen corresponding path program 5 times [2022-02-11 00:52:30,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:30,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612204207] [2022-02-11 00:52:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:30,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:30,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:30,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612204207] [2022-02-11 00:52:30,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612204207] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:30,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451152887] [2022-02-11 00:52:30,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:52:30,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:30,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:30,827 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:30,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-11 00:52:30,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:52:30,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:30,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:30,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:31,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:31,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:31,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:31,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:31,124 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 37 treesize of output 21 [2022-02-11 00:52:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:31,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:31,407 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:31,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:52:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:31,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:31,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:31,458 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 20 treesize of output 3 [2022-02-11 00:52:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:31,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451152887] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:31,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:31,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:52:31,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888975647] [2022-02-11 00:52:31,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:31,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:52:31,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:52:31,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:52:31,474 INFO L87 Difference]: Start difference. First operand 2695 states and 9024 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:32,996 INFO L93 Difference]: Finished difference Result 3440 states and 11288 transitions. [2022-02-11 00:52:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:52:32,996 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:52:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:33,003 INFO L225 Difference]: With dead ends: 3440 [2022-02-11 00:52:33,003 INFO L226 Difference]: Without dead ends: 3435 [2022-02-11 00:52:33,003 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:52:33,003 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 192 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:33,004 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 209 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1977 Invalid, 0 Unknown, 524 Unchecked, 0.8s Time] [2022-02-11 00:52:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-02-11 00:52:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2700. [2022-02-11 00:52:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 3.347906632085958) internal successors, (9036), 2699 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 9036 transitions. [2022-02-11 00:52:33,044 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 9036 transitions. Word has length 24 [2022-02-11 00:52:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:33,044 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 9036 transitions. [2022-02-11 00:52:33,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 9036 transitions. [2022-02-11 00:52:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:33,048 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:33,048 INFO L515 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] [2022-02-11 00:52:33,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-02-11 00:52:33,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:33,248 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -922618564, now seen corresponding path program 6 times [2022-02-11 00:52:33,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:33,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849848544] [2022-02-11 00:52:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:33,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:33,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:33,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849848544] [2022-02-11 00:52:33,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849848544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:33,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463334780] [2022-02-11 00:52:33,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:52:33,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:33,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:33,438 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:33,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-11 00:52:33,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:52:33,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:33,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:33,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:33,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:33,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:33,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:33,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:33,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-02-11 00:52:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:33,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:34,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:34,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:34,387 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 45 treesize of output 7 [2022-02-11 00:52:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:34,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463334780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:34,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:34,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:52:34,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106972240] [2022-02-11 00:52:34,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:34,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:52:34,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:52:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:52:34,416 INFO L87 Difference]: Start difference. First operand 2700 states and 9036 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:52:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:38,452 INFO L93 Difference]: Finished difference Result 4885 states and 16240 transitions. [2022-02-11 00:52:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-11 00:52:38,453 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:52:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:38,462 INFO L225 Difference]: With dead ends: 4885 [2022-02-11 00:52:38,462 INFO L226 Difference]: Without dead ends: 4875 [2022-02-11 00:52:38,463 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=948, Invalid=9354, Unknown=0, NotChecked=0, Total=10302 [2022-02-11 00:52:38,463 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 228 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1290 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:38,463 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 285 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2170 Invalid, 0 Unknown, 1290 Unchecked, 0.9s Time] [2022-02-11 00:52:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-02-11 00:52:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 2715. [2022-02-11 00:52:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 3.347457627118644) internal successors, (9085), 2714 states have internal predecessors, (9085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 9085 transitions. [2022-02-11 00:52:38,511 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 9085 transitions. Word has length 24 [2022-02-11 00:52:38,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:38,511 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 9085 transitions. [2022-02-11 00:52:38,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:52:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 9085 transitions. [2022-02-11 00:52:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:38,515 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:38,515 INFO L515 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] [2022-02-11 00:52:38,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:38,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:38,715 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:38,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:38,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1717037502, now seen corresponding path program 7 times [2022-02-11 00:52:38,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:38,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145754078] [2022-02-11 00:52:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:38,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:38,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:38,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145754078] [2022-02-11 00:52:38,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145754078] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:38,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483993633] [2022-02-11 00:52:38,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:38,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:38,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:38,901 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:38,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-11 00:52:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:38,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:39,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:39,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:39,186 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 33 treesize of output 17 [2022-02-11 00:52:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:39,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:39,442 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:39,443 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:52:39,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:39,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:39,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:39,496 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 20 treesize of output 3 [2022-02-11 00:52:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:39,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483993633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:39,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:39,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:52:39,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813216222] [2022-02-11 00:52:39,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:39,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:52:39,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:52:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:52:39,511 INFO L87 Difference]: Start difference. First operand 2715 states and 9085 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:40,995 INFO L93 Difference]: Finished difference Result 4179 states and 13864 transitions. [2022-02-11 00:52:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 00:52:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:52:40,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:41,003 INFO L225 Difference]: With dead ends: 4179 [2022-02-11 00:52:41,003 INFO L226 Difference]: Without dead ends: 4173 [2022-02-11 00:52:41,003 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=319, Invalid=2761, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:52:41,003 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 199 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:41,003 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 231 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1586 Invalid, 0 Unknown, 497 Unchecked, 0.6s Time] [2022-02-11 00:52:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-02-11 00:52:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 2710. [2022-02-11 00:52:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 3.349575489110373) internal successors, (9074), 2709 states have internal predecessors, (9074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 9074 transitions. [2022-02-11 00:52:41,047 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 9074 transitions. Word has length 24 [2022-02-11 00:52:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:41,048 INFO L470 AbstractCegarLoop]: Abstraction has 2710 states and 9074 transitions. [2022-02-11 00:52:41,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 9074 transitions. [2022-02-11 00:52:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:41,051 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:41,051 INFO L515 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] [2022-02-11 00:52:41,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-02-11 00:52:41,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-02-11 00:52:41,252 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:41,252 INFO L85 PathProgramCache]: Analyzing trace with hash -348066496, now seen corresponding path program 8 times [2022-02-11 00:52:41,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:41,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248501248] [2022-02-11 00:52:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:41,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:41,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:41,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248501248] [2022-02-11 00:52:41,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248501248] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:41,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817699047] [2022-02-11 00:52:41,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:52:41,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:41,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:41,446 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:41,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-11 00:52:41,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:52:41,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:41,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:41,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:41,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:41,799 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 39 treesize of output 51 [2022-02-11 00:52:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:41,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:42,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:42,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:42,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:42,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:42,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-02-11 00:52:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:42,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817699047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:42,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:42,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:52:42,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683048050] [2022-02-11 00:52:42,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:42,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:42,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:42,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:42,449 INFO L87 Difference]: Start difference. First operand 2710 states and 9074 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:52:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:44,291 INFO L93 Difference]: Finished difference Result 3515 states and 11562 transitions. [2022-02-11 00:52:44,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:52:44,292 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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 [2022-02-11 00:52:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:44,298 INFO L225 Difference]: With dead ends: 3515 [2022-02-11 00:52:44,298 INFO L226 Difference]: Without dead ends: 3510 [2022-02-11 00:52:44,298 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=347, Invalid=3313, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:52:44,298 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 226 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1932 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:44,298 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 274 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1635 Invalid, 0 Unknown, 1932 Unchecked, 0.6s Time] [2022-02-11 00:52:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2022-02-11 00:52:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2686. [2022-02-11 00:52:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 3.3579143389199255) internal successors, (9016), 2685 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 9016 transitions. [2022-02-11 00:52:44,334 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 9016 transitions. Word has length 24 [2022-02-11 00:52:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:44,334 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 9016 transitions. [2022-02-11 00:52:44,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:52:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 9016 transitions. [2022-02-11 00:52:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:44,338 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:44,338 INFO L515 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] [2022-02-11 00:52:44,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:44,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:44,538 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:44,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:44,538 INFO L85 PathProgramCache]: Analyzing trace with hash 704223460, now seen corresponding path program 9 times [2022-02-11 00:52:44,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:44,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410029318] [2022-02-11 00:52:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:44,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:44,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:44,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410029318] [2022-02-11 00:52:44,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410029318] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:44,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240844283] [2022-02-11 00:52:44,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:52:44,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:44,735 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:44,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-11 00:52:44,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:52:44,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:52:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:45,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:45,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:45,068 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:52:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:45,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:45,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:45,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:45,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:45,735 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 41 treesize of output 56 [2022-02-11 00:52:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:45,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240844283] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:45,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:45,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-02-11 00:52:45,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778292218] [2022-02-11 00:52:45,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:45,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:45,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:45,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:45,890 INFO L87 Difference]: Start difference. First operand 2686 states and 9016 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:52:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:46,983 INFO L93 Difference]: Finished difference Result 3703 states and 12695 transitions. [2022-02-11 00:52:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:52:46,983 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:52:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:46,990 INFO L225 Difference]: With dead ends: 3703 [2022-02-11 00:52:46,990 INFO L226 Difference]: Without dead ends: 3701 [2022-02-11 00:52:46,990 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:52:46,991 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:46,991 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 173 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 558 Unchecked, 0.1s Time] [2022-02-11 00:52:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2022-02-11 00:52:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 2691. [2022-02-11 00:52:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 3.3557620817843867) internal successors, (9027), 2690 states have internal predecessors, (9027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 9027 transitions. [2022-02-11 00:52:47,030 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 9027 transitions. Word has length 24 [2022-02-11 00:52:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:47,030 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 9027 transitions. [2022-02-11 00:52:47,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:52:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 9027 transitions. [2022-02-11 00:52:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:47,033 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:47,033 INFO L515 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] [2022-02-11 00:52:47,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-02-11 00:52:47,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-02-11 00:52:47,234 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash -560222114, now seen corresponding path program 10 times [2022-02-11 00:52:47,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:47,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534713640] [2022-02-11 00:52:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:47,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:47,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:47,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534713640] [2022-02-11 00:52:47,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534713640] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:47,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555368353] [2022-02-11 00:52:47,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:52:47,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:47,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:47,442 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:47,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-11 00:52:47,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:52:47,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:47,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:47,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:47,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:47,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:47,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:47,733 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 33 treesize of output 17 [2022-02-11 00:52:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:47,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:48,019 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:48,020 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 20 treesize of output 43 [2022-02-11 00:52:48,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:48,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:48,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:48,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:48,069 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 20 treesize of output 3 [2022-02-11 00:52:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:48,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555368353] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:48,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:48,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:52:48,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990382309] [2022-02-11 00:52:48,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:48,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:52:48,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:52:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:52:48,085 INFO L87 Difference]: Start difference. First operand 2691 states and 9027 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:49,397 INFO L93 Difference]: Finished difference Result 3064 states and 10166 transitions. [2022-02-11 00:52:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:52:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:52:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:49,403 INFO L225 Difference]: With dead ends: 3064 [2022-02-11 00:52:49,403 INFO L226 Difference]: Without dead ends: 3058 [2022-02-11 00:52:49,403 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:52:49,403 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:49,403 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 162 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1805 Invalid, 0 Unknown, 279 Unchecked, 0.7s Time] [2022-02-11 00:52:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-02-11 00:52:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2695. [2022-02-11 00:52:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.35449146250928) internal successors, (9037), 2694 states have internal predecessors, (9037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9037 transitions. [2022-02-11 00:52:49,437 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9037 transitions. Word has length 24 [2022-02-11 00:52:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:49,437 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9037 transitions. [2022-02-11 00:52:49,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9037 transitions. [2022-02-11 00:52:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:49,441 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:49,441 INFO L515 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] [2022-02-11 00:52:49,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-02-11 00:52:49,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-02-11 00:52:49,647 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:49,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1092727899, now seen corresponding path program 1 times [2022-02-11 00:52:49,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:49,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356164813] [2022-02-11 00:52:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:49,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:49,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:49,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356164813] [2022-02-11 00:52:49,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356164813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:49,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589512004] [2022-02-11 00:52:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:49,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:49,843 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:49,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-11 00:52:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:49,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:50,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:50,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:50,132 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 37 treesize of output 21 [2022-02-11 00:52:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:50,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:50,413 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:50,414 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 20 treesize of output 43 [2022-02-11 00:52:50,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:50,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:50,463 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 20 treesize of output 3 [2022-02-11 00:52:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:50,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589512004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:50,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:50,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:52:50,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713914358] [2022-02-11 00:52:50,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:50,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:52:50,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:52:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:52:50,479 INFO L87 Difference]: Start difference. First operand 2695 states and 9037 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:51,834 INFO L93 Difference]: Finished difference Result 3168 states and 10462 transitions. [2022-02-11 00:52:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:52:51,835 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:52:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:51,840 INFO L225 Difference]: With dead ends: 3168 [2022-02-11 00:52:51,840 INFO L226 Difference]: Without dead ends: 3162 [2022-02-11 00:52:51,841 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:52:51,841 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 170 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1193 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:51,841 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 173 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1700 Invalid, 0 Unknown, 1193 Unchecked, 0.6s Time] [2022-02-11 00:52:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-02-11 00:52:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2692. [2022-02-11 00:52:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 3.3552582683017467) internal successors, (9029), 2691 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 9029 transitions. [2022-02-11 00:52:51,875 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 9029 transitions. Word has length 24 [2022-02-11 00:52:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:51,875 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 9029 transitions. [2022-02-11 00:52:51,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:52:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 9029 transitions. [2022-02-11 00:52:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:51,879 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:51,879 INFO L515 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] [2022-02-11 00:52:51,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-02-11 00:52:52,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-02-11 00:52:52,079 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:52,079 INFO L85 PathProgramCache]: Analyzing trace with hash 161966204, now seen corresponding path program 11 times [2022-02-11 00:52:52,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:52,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884500833] [2022-02-11 00:52:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:52,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:52,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:52,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884500833] [2022-02-11 00:52:52,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884500833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:52,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396755520] [2022-02-11 00:52:52,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:52:52,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:52,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:52,293 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:52,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-11 00:52:52,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:52:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:52,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:52,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:52,587 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 37 treesize of output 21 [2022-02-11 00:52:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:52,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:52,833 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:52,833 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 20 treesize of output 43 [2022-02-11 00:52:52,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:52,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:52,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:52,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:52,881 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 20 treesize of output 3 [2022-02-11 00:52:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:52,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396755520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:52,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:52,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:52:52,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132481600] [2022-02-11 00:52:52,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:52,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:52:52,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:52,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:52:52,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:52:52,897 INFO L87 Difference]: Start difference. First operand 2692 states and 9029 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:53,753 INFO L93 Difference]: Finished difference Result 3042 states and 10151 transitions. [2022-02-11 00:52:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:52:53,754 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:52:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:53,759 INFO L225 Difference]: With dead ends: 3042 [2022-02-11 00:52:53,759 INFO L226 Difference]: Without dead ends: 3036 [2022-02-11 00:52:53,759 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:52:53,760 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:53,760 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 159 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1320 Invalid, 0 Unknown, 513 Unchecked, 0.5s Time] [2022-02-11 00:52:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2022-02-11 00:52:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2695. [2022-02-11 00:52:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.3537490720118783) internal successors, (9035), 2694 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9035 transitions. [2022-02-11 00:52:53,794 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9035 transitions. Word has length 24 [2022-02-11 00:52:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:53,794 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9035 transitions. [2022-02-11 00:52:53,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9035 transitions. [2022-02-11 00:52:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:53,798 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:53,798 INFO L515 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] [2022-02-11 00:52:53,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-02-11 00:52:53,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:53,998 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:53,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1493345026, now seen corresponding path program 12 times [2022-02-11 00:52:53,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:53,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579505914] [2022-02-11 00:52:53,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:53,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:54,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:54,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579505914] [2022-02-11 00:52:54,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579505914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:54,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834135021] [2022-02-11 00:52:54,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:52:54,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:54,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:54,224 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:54,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-11 00:52:54,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:52:54,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:54,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:54,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:54,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:54,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:54,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:54,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:54,601 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 35 treesize of output 47 [2022-02-11 00:52:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:54,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:55,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:55,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:55,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:55,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:55,201 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 45 treesize of output 7 [2022-02-11 00:52:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:55,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834135021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:55,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:55,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:52:55,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303886214] [2022-02-11 00:52:55,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:55,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:52:55,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:52:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:52:55,230 INFO L87 Difference]: Start difference. First operand 2695 states and 9035 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:52:56,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:56,652 INFO L93 Difference]: Finished difference Result 3280 states and 10877 transitions. [2022-02-11 00:52:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:52:56,653 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:52:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:56,659 INFO L225 Difference]: With dead ends: 3280 [2022-02-11 00:52:56,659 INFO L226 Difference]: Without dead ends: 3272 [2022-02-11 00:52:56,659 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=346, Invalid=3194, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:52:56,659 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 148 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:56,659 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 193 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 910 Invalid, 0 Unknown, 728 Unchecked, 0.4s Time] [2022-02-11 00:52:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-02-11 00:52:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2700. [2022-02-11 00:52:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 3.3519822156354206) internal successors, (9047), 2699 states have internal predecessors, (9047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 9047 transitions. [2022-02-11 00:52:56,694 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 9047 transitions. Word has length 24 [2022-02-11 00:52:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:56,694 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 9047 transitions. [2022-02-11 00:52:56,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:52:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 9047 transitions. [2022-02-11 00:52:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:56,698 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:56,698 INFO L515 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] [2022-02-11 00:52:56,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-02-11 00:52:56,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:56,914 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2106276388, now seen corresponding path program 13 times [2022-02-11 00:52:56,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:56,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759567285] [2022-02-11 00:52:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:56,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:57,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:57,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759567285] [2022-02-11 00:52:57,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759567285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:57,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37256091] [2022-02-11 00:52:57,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:57,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:57,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:57,128 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:57,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-11 00:52:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:57,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:57,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:57,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:57,408 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 37 treesize of output 21 [2022-02-11 00:52:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:57,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:57,666 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:52:57,666 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 20 treesize of output 43 [2022-02-11 00:52:57,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:57,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:57,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:57,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:57,708 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 20 treesize of output 3 [2022-02-11 00:52:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:57,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37256091] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:57,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:57,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:52:57,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080843965] [2022-02-11 00:52:57,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:57,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:52:57,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:52:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:52:57,725 INFO L87 Difference]: Start difference. First operand 2700 states and 9047 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:58,410 INFO L93 Difference]: Finished difference Result 3046 states and 10128 transitions. [2022-02-11 00:52:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:52:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:52:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:58,416 INFO L225 Difference]: With dead ends: 3046 [2022-02-11 00:52:58,416 INFO L226 Difference]: Without dead ends: 3040 [2022-02-11 00:52:58,416 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:52:58,416 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:58,416 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 173 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 997 Invalid, 0 Unknown, 619 Unchecked, 0.4s Time] [2022-02-11 00:52:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2022-02-11 00:52:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 2711. [2022-02-11 00:52:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 3.347970479704797) internal successors, (9073), 2710 states have internal predecessors, (9073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 9073 transitions. [2022-02-11 00:52:58,454 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 9073 transitions. Word has length 24 [2022-02-11 00:52:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:58,455 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 9073 transitions. [2022-02-11 00:52:58,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 9073 transitions. [2022-02-11 00:52:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:52:58,458 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:58,458 INFO L515 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] [2022-02-11 00:52:58,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-02-11 00:52:58,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:58,659 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:52:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:58,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1245023274, now seen corresponding path program 14 times [2022-02-11 00:52:58,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:58,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026218237] [2022-02-11 00:52:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:58,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:58,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:58,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026218237] [2022-02-11 00:52:58,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026218237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:58,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808063016] [2022-02-11 00:52:58,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:52:58,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:58,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:58,881 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:52:58,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-11 00:52:58,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:52:58,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:58,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:52:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:59,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:59,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:59,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:59,204 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:52:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:59,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:59,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:59,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:59,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:59,835 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 41 treesize of output 56 [2022-02-11 00:52:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:59,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808063016] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:59,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:59,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:52:59,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393675473] [2022-02-11 00:52:59,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:59,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:52:59,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:52:59,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:52:59,911 INFO L87 Difference]: Start difference. First operand 2711 states and 9073 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:01,284 INFO L93 Difference]: Finished difference Result 3799 states and 13030 transitions. [2022-02-11 00:53:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:53:01,284 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:01,291 INFO L225 Difference]: With dead ends: 3799 [2022-02-11 00:53:01,292 INFO L226 Difference]: Without dead ends: 3794 [2022-02-11 00:53:01,292 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:53:01,292 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 120 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:01,292 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 146 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 471 Invalid, 0 Unknown, 1051 Unchecked, 0.2s Time] [2022-02-11 00:53:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2022-02-11 00:53:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2716. [2022-02-11 00:53:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 3.347329650092081) internal successors, (9088), 2715 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 9088 transitions. [2022-02-11 00:53:01,335 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 9088 transitions. Word has length 24 [2022-02-11 00:53:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:01,335 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 9088 transitions. [2022-02-11 00:53:01,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 9088 transitions. [2022-02-11 00:53:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:01,339 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:01,339 INFO L515 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] [2022-02-11 00:53:01,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:01,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:01,540 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:01,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1242489559, now seen corresponding path program 2 times [2022-02-11 00:53:01,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:01,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050543844] [2022-02-11 00:53:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:01,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:01,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050543844] [2022-02-11 00:53:01,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050543844] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:01,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826165230] [2022-02-11 00:53:01,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:53:01,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:01,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:01,757 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:01,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-11 00:53:01,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:53:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:53:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:02,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:02,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:02,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:02,066 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:53:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:02,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:02,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:02,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:02,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:02,721 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 41 treesize of output 56 [2022-02-11 00:53:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:02,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826165230] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:02,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:02,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:53:02,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369619251] [2022-02-11 00:53:02,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:02,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:53:02,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:02,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:53:02,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:53:02,799 INFO L87 Difference]: Start difference. First operand 2716 states and 9088 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:03,740 INFO L93 Difference]: Finished difference Result 3740 states and 12792 transitions. [2022-02-11 00:53:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:53:03,740 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:03,748 INFO L225 Difference]: With dead ends: 3740 [2022-02-11 00:53:03,748 INFO L226 Difference]: Without dead ends: 3735 [2022-02-11 00:53:03,749 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:53:03,749 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 805 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:03,749 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 178 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 462 Invalid, 0 Unknown, 805 Unchecked, 0.2s Time] [2022-02-11 00:53:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2022-02-11 00:53:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 2724. [2022-02-11 00:53:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 3.345207491737055) internal successors, (9109), 2723 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9109 transitions. [2022-02-11 00:53:03,793 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9109 transitions. Word has length 24 [2022-02-11 00:53:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:03,793 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9109 transitions. [2022-02-11 00:53:03,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9109 transitions. [2022-02-11 00:53:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:03,797 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:03,797 INFO L515 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] [2022-02-11 00:53:03,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:03,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:03,998 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2037251490, now seen corresponding path program 15 times [2022-02-11 00:53:03,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:03,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137527321] [2022-02-11 00:53:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:03,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:04,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:04,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137527321] [2022-02-11 00:53:04,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137527321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:04,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824526754] [2022-02-11 00:53:04,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:53:04,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:04,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:04,283 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:04,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-11 00:53:04,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:53:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:53:04,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:04,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:04,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:04,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:04,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:53:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:04,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:05,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:05,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:05,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-02-11 00:53:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:05,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824526754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:05,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:05,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:53:05,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668004697] [2022-02-11 00:53:05,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:05,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:53:05,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:05,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:53:05,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:53:05,164 INFO L87 Difference]: Start difference. First operand 2724 states and 9109 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:06,091 INFO L93 Difference]: Finished difference Result 3059 states and 10170 transitions. [2022-02-11 00:53:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:53:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:06,097 INFO L225 Difference]: With dead ends: 3059 [2022-02-11 00:53:06,097 INFO L226 Difference]: Without dead ends: 3057 [2022-02-11 00:53:06,097 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:53:06,098 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:06,098 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 134 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 953 Invalid, 0 Unknown, 363 Unchecked, 0.4s Time] [2022-02-11 00:53:06,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2022-02-11 00:53:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 2724. [2022-02-11 00:53:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 3.345207491737055) internal successors, (9109), 2723 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9109 transitions. [2022-02-11 00:53:06,135 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9109 transitions. Word has length 24 [2022-02-11 00:53:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:06,135 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9109 transitions. [2022-02-11 00:53:06,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9109 transitions. [2022-02-11 00:53:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:06,139 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:06,139 INFO L515 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] [2022-02-11 00:53:06,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:06,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:06,340 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash 229797027, now seen corresponding path program 3 times [2022-02-11 00:53:06,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:06,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960010193] [2022-02-11 00:53:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:06,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:06,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:06,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960010193] [2022-02-11 00:53:06,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960010193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:06,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762551358] [2022-02-11 00:53:06,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:53:06,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:06,575 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:06,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-11 00:53:06,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:53:06,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:06,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:53:06,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:07,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:07,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:07,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:07,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:07,013 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 33 treesize of output 21 [2022-02-11 00:53:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:07,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:07,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:07,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:07,375 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 37 treesize of output 54 [2022-02-11 00:53:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:07,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762551358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:07,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:07,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:53:07,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39245277] [2022-02-11 00:53:07,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:07,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:53:07,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:07,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:53:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:53:07,504 INFO L87 Difference]: Start difference. First operand 2724 states and 9109 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:08,723 INFO L93 Difference]: Finished difference Result 3203 states and 10673 transitions. [2022-02-11 00:53:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:53:08,723 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:08,729 INFO L225 Difference]: With dead ends: 3203 [2022-02-11 00:53:08,729 INFO L226 Difference]: Without dead ends: 3198 [2022-02-11 00:53:08,730 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:53:08,730 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 745 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:08,730 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 160 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1275 Invalid, 0 Unknown, 745 Unchecked, 0.5s Time] [2022-02-11 00:53:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-02-11 00:53:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2721. [2022-02-11 00:53:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2720 states have (on average 3.3459558823529414) internal successors, (9101), 2720 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 9101 transitions. [2022-02-11 00:53:08,769 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 9101 transitions. Word has length 24 [2022-02-11 00:53:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:08,770 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 9101 transitions. [2022-02-11 00:53:08,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 9101 transitions. [2022-02-11 00:53:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:08,774 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:08,774 INFO L515 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] [2022-02-11 00:53:08,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-02-11 00:53:08,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:08,975 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash 290200096, now seen corresponding path program 16 times [2022-02-11 00:53:08,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:08,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816255081] [2022-02-11 00:53:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:08,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:09,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:09,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816255081] [2022-02-11 00:53:09,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816255081] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:09,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017774069] [2022-02-11 00:53:09,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:53:09,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:09,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:09,223 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:09,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-11 00:53:09,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:53:09,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:09,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:09,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:09,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:09,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:09,501 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 37 treesize of output 21 [2022-02-11 00:53:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:09,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:09,750 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:53:09,751 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 20 treesize of output 43 [2022-02-11 00:53:09,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:09,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:09,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:09,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:09,795 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 20 treesize of output 3 [2022-02-11 00:53:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:09,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017774069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:09,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:09,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:53:09,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78260039] [2022-02-11 00:53:09,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:09,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:53:09,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:53:09,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:53:09,812 INFO L87 Difference]: Start difference. First operand 2721 states and 9101 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:10,854 INFO L93 Difference]: Finished difference Result 3085 states and 10266 transitions. [2022-02-11 00:53:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:53:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:10,861 INFO L225 Difference]: With dead ends: 3085 [2022-02-11 00:53:10,861 INFO L226 Difference]: Without dead ends: 3079 [2022-02-11 00:53:10,861 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:53:10,861 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:10,861 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 151 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1267 Invalid, 0 Unknown, 233 Unchecked, 0.5s Time] [2022-02-11 00:53:10,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-02-11 00:53:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 2722. [2022-02-11 00:53:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 3.3454612274898934) internal successors, (9103), 2721 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 9103 transitions. [2022-02-11 00:53:10,900 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 9103 transitions. Word has length 24 [2022-02-11 00:53:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 9103 transitions. [2022-02-11 00:53:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 9103 transitions. [2022-02-11 00:53:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:10,904 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:10,904 INFO L515 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] [2022-02-11 00:53:10,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-02-11 00:53:11,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-02-11 00:53:11,106 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1596395592, now seen corresponding path program 17 times [2022-02-11 00:53:11,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:11,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510372044] [2022-02-11 00:53:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:11,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:11,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:11,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510372044] [2022-02-11 00:53:11,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510372044] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:11,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275142028] [2022-02-11 00:53:11,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:53:11,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:11,336 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:11,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-11 00:53:11,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:53:11,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:53:11,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:11,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:11,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:11,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:53:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:11,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:12,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:12,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:12,165 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 37 treesize of output 54 [2022-02-11 00:53:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:12,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275142028] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:12,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:12,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:53:12,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597862806] [2022-02-11 00:53:12,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:12,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:53:12,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:53:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:53:12,270 INFO L87 Difference]: Start difference. First operand 2722 states and 9103 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:13,117 INFO L93 Difference]: Finished difference Result 2948 states and 9837 transitions. [2022-02-11 00:53:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:53:13,118 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:13,124 INFO L225 Difference]: With dead ends: 2948 [2022-02-11 00:53:13,124 INFO L226 Difference]: Without dead ends: 2942 [2022-02-11 00:53:13,124 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:53:13,124 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:13,124 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 128 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1382 Invalid, 0 Unknown, 329 Unchecked, 0.5s Time] [2022-02-11 00:53:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-02-11 00:53:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2724. [2022-02-11 00:53:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 3.3444730077120823) internal successors, (9107), 2723 states have internal predecessors, (9107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9107 transitions. [2022-02-11 00:53:13,166 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9107 transitions. Word has length 24 [2022-02-11 00:53:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:13,166 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9107 transitions. [2022-02-11 00:53:13,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9107 transitions. [2022-02-11 00:53:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:13,171 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:13,171 INFO L515 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] [2022-02-11 00:53:13,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-02-11 00:53:13,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-02-11 00:53:13,372 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash -528106916, now seen corresponding path program 18 times [2022-02-11 00:53:13,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:13,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281243644] [2022-02-11 00:53:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:13,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:13,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:13,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281243644] [2022-02-11 00:53:13,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281243644] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:13,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026200385] [2022-02-11 00:53:13,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:53:13,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:13,608 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:13,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-11 00:53:13,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:53:13,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:13,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:53:13,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:13,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:13,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:13,980 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 28 treesize of output 42 [2022-02-11 00:53:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:14,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:14,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:14,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:14,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:14,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:14,944 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 41 treesize of output 7 [2022-02-11 00:53:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:14,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026200385] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:14,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:14,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:53:14,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143469099] [2022-02-11 00:53:14,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:14,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:53:14,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:14,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:53:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:53:14,974 INFO L87 Difference]: Start difference. First operand 2724 states and 9107 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:15,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:15,939 INFO L93 Difference]: Finished difference Result 2971 states and 9838 transitions. [2022-02-11 00:53:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:53:15,939 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:15,945 INFO L225 Difference]: With dead ends: 2971 [2022-02-11 00:53:15,945 INFO L226 Difference]: Without dead ends: 2965 [2022-02-11 00:53:15,945 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=1707, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:53:15,945 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:15,945 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 128 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1066 Invalid, 0 Unknown, 263 Unchecked, 0.5s Time] [2022-02-11 00:53:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-02-11 00:53:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2725. [2022-02-11 00:53:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.3443465491923643) internal successors, (9110), 2724 states have internal predecessors, (9110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 9110 transitions. [2022-02-11 00:53:15,978 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 9110 transitions. Word has length 24 [2022-02-11 00:53:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:15,979 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 9110 transitions. [2022-02-11 00:53:15,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 9110 transitions. [2022-02-11 00:53:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:15,982 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:15,982 INFO L515 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] [2022-02-11 00:53:15,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:16,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-02-11 00:53:16,183 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:16,183 INFO L85 PathProgramCache]: Analyzing trace with hash 205459606, now seen corresponding path program 19 times [2022-02-11 00:53:16,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:16,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313645741] [2022-02-11 00:53:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:16,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:16,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:16,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313645741] [2022-02-11 00:53:16,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313645741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:16,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787146159] [2022-02-11 00:53:16,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:53:16,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:16,408 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:16,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-11 00:53:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:16,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:16,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:16,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:16,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:16,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:16,628 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 30 treesize of output 16 [2022-02-11 00:53:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:16,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:16,951 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:53:16,951 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 20 treesize of output 43 [2022-02-11 00:53:16,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:16,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:16,989 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 20 treesize of output 3 [2022-02-11 00:53:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:17,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787146159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:17,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:17,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-02-11 00:53:17,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754798008] [2022-02-11 00:53:17,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:17,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:53:17,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:53:17,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:53:17,005 INFO L87 Difference]: Start difference. First operand 2725 states and 9110 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-02-11 00:53:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:17,727 INFO L93 Difference]: Finished difference Result 3010 states and 10068 transitions. [2022-02-11 00:53:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:53:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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 [2022-02-11 00:53:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:17,733 INFO L225 Difference]: With dead ends: 3010 [2022-02-11 00:53:17,734 INFO L226 Difference]: Without dead ends: 3003 [2022-02-11 00:53:17,734 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:53:17,734 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:17,734 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 78 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 979 Invalid, 0 Unknown, 446 Unchecked, 0.4s Time] [2022-02-11 00:53:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-02-11 00:53:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2722. [2022-02-11 00:53:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 3.3454612274898934) internal successors, (9103), 2721 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 9103 transitions. [2022-02-11 00:53:17,771 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 9103 transitions. Word has length 24 [2022-02-11 00:53:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:17,771 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 9103 transitions. [2022-02-11 00:53:17,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-02-11 00:53:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 9103 transitions. [2022-02-11 00:53:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:17,775 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:17,775 INFO L515 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] [2022-02-11 00:53:17,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-02-11 00:53:17,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:17,975 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1151190437, now seen corresponding path program 1 times [2022-02-11 00:53:17,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:17,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769898066] [2022-02-11 00:53:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:18,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:18,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769898066] [2022-02-11 00:53:18,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769898066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:18,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606808645] [2022-02-11 00:53:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:18,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:18,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:18,164 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:18,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-11 00:53:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:18,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:18,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:18,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:18,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:18,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:18,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:18,443 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 37 treesize of output 21 [2022-02-11 00:53:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:18,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:18,720 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:53:18,720 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 20 treesize of output 43 [2022-02-11 00:53:18,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:18,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:18,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:18,775 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 20 treesize of output 3 [2022-02-11 00:53:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:18,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606808645] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:18,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:18,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:53:18,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852376300] [2022-02-11 00:53:18,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:18,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:53:18,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:53:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:53:18,791 INFO L87 Difference]: Start difference. First operand 2722 states and 9103 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:53:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:20,361 INFO L93 Difference]: Finished difference Result 3685 states and 12161 transitions. [2022-02-11 00:53:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:53:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:53:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:20,368 INFO L225 Difference]: With dead ends: 3685 [2022-02-11 00:53:20,368 INFO L226 Difference]: Without dead ends: 3677 [2022-02-11 00:53:20,369 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=2689, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:53:20,369 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:20,369 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 222 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1821 Invalid, 0 Unknown, 867 Unchecked, 0.7s Time] [2022-02-11 00:53:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2022-02-11 00:53:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 2742. [2022-02-11 00:53:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 2741 states have (on average 3.3363735862823787) internal successors, (9145), 2741 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 9145 transitions. [2022-02-11 00:53:20,411 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 9145 transitions. Word has length 24 [2022-02-11 00:53:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:20,411 INFO L470 AbstractCegarLoop]: Abstraction has 2742 states and 9145 transitions. [2022-02-11 00:53:20,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:53:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 9145 transitions. [2022-02-11 00:53:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:20,415 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:20,415 INFO L515 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] [2022-02-11 00:53:20,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-02-11 00:53:20,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-02-11 00:53:20,615 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash -274716803, now seen corresponding path program 2 times [2022-02-11 00:53:20,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:20,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453095158] [2022-02-11 00:53:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:20,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:20,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:20,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453095158] [2022-02-11 00:53:20,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453095158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:20,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101231555] [2022-02-11 00:53:20,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:53:20,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:20,817 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:20,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-11 00:53:20,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:53:20,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:21,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:21,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:21,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:21,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:21,165 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 35 treesize of output 47 [2022-02-11 00:53:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:21,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:21,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:21,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:21,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:21,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:21,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-02-11 00:53:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:21,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101231555] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:21,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:21,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:53:21,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690106922] [2022-02-11 00:53:21,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:21,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:53:21,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:53:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:53:21,811 INFO L87 Difference]: Start difference. First operand 2742 states and 9145 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:53:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:23,924 INFO L93 Difference]: Finished difference Result 3536 states and 11657 transitions. [2022-02-11 00:53:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:53:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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 [2022-02-11 00:53:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:23,931 INFO L225 Difference]: With dead ends: 3536 [2022-02-11 00:53:23,931 INFO L226 Difference]: Without dead ends: 3530 [2022-02-11 00:53:23,931 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=436, Invalid=3986, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:53:23,932 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1214 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:23,932 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 228 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1453 Invalid, 0 Unknown, 1214 Unchecked, 0.6s Time] [2022-02-11 00:53:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2022-02-11 00:53:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 2744. [2022-02-11 00:53:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 3.3357637623040466) internal successors, (9150), 2743 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 9150 transitions. [2022-02-11 00:53:23,973 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 9150 transitions. Word has length 24 [2022-02-11 00:53:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:23,973 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 9150 transitions. [2022-02-11 00:53:23,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:53:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 9150 transitions. [2022-02-11 00:53:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:23,977 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:23,977 INFO L515 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] [2022-02-11 00:53:23,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-02-11 00:53:24,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-02-11 00:53:24,178 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:24,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash -145634084, now seen corresponding path program 1 times [2022-02-11 00:53:24,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:24,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934721170] [2022-02-11 00:53:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:24,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:24,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934721170] [2022-02-11 00:53:24,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934721170] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:24,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823388394] [2022-02-11 00:53:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:24,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:24,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:24,379 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:24,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-11 00:53:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:24,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:24,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:24,663 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 37 treesize of output 21 [2022-02-11 00:53:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:24,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:24,938 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:53:24,938 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 20 treesize of output 43 [2022-02-11 00:53:24,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:24,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:24,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:24,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:24,988 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 20 treesize of output 3 [2022-02-11 00:53:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:25,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823388394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:25,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:25,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:53:25,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949360599] [2022-02-11 00:53:25,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:25,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:53:25,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:53:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:53:25,004 INFO L87 Difference]: Start difference. First operand 2744 states and 9150 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:53:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:26,428 INFO L93 Difference]: Finished difference Result 3704 states and 12061 transitions. [2022-02-11 00:53:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:53:26,429 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:53:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:26,436 INFO L225 Difference]: With dead ends: 3704 [2022-02-11 00:53:26,436 INFO L226 Difference]: Without dead ends: 3702 [2022-02-11 00:53:26,437 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=2514, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:53:26,437 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 220 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:26,437 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 267 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1814 Invalid, 0 Unknown, 584 Unchecked, 0.7s Time] [2022-02-11 00:53:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-02-11 00:53:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 2746. [2022-02-11 00:53:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.336976320582878) internal successors, (9160), 2745 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 9160 transitions. [2022-02-11 00:53:26,483 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 9160 transitions. Word has length 24 [2022-02-11 00:53:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:26,483 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 9160 transitions. [2022-02-11 00:53:26,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:53:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 9160 transitions. [2022-02-11 00:53:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:26,488 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:26,488 INFO L515 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] [2022-02-11 00:53:26,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-02-11 00:53:26,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:26,688 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:26,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2083192027, now seen corresponding path program 3 times [2022-02-11 00:53:26,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:26,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191767101] [2022-02-11 00:53:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:26,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:26,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:26,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191767101] [2022-02-11 00:53:26,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191767101] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:26,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590505681] [2022-02-11 00:53:26,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:53:26,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:26,890 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:26,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-11 00:53:26,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:53:26,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:53:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:27,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:27,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:27,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:27,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:27,226 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:53:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:27,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:27,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:27,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:27,899 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 41 treesize of output 56 [2022-02-11 00:53:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:27,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590505681] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:27,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:27,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-02-11 00:53:27,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386100566] [2022-02-11 00:53:27,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:27,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:53:27,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:27,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:53:27,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:53:27,983 INFO L87 Difference]: Start difference. First operand 2746 states and 9160 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:53:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:30,719 INFO L93 Difference]: Finished difference Result 3932 states and 13282 transitions. [2022-02-11 00:53:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:53:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:53:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:30,727 INFO L225 Difference]: With dead ends: 3932 [2022-02-11 00:53:30,727 INFO L226 Difference]: Without dead ends: 3928 [2022-02-11 00:53:30,727 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=612, Invalid=4644, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 00:53:30,728 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1478 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:30,728 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 181 Invalid, 2332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 814 Invalid, 0 Unknown, 1478 Unchecked, 0.3s Time] [2022-02-11 00:53:30,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2022-02-11 00:53:30,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 2769. [2022-02-11 00:53:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2768 states have (on average 3.328757225433526) internal successors, (9214), 2768 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 9214 transitions. [2022-02-11 00:53:30,775 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 9214 transitions. Word has length 24 [2022-02-11 00:53:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:30,775 INFO L470 AbstractCegarLoop]: Abstraction has 2769 states and 9214 transitions. [2022-02-11 00:53:30,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:53:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 9214 transitions. [2022-02-11 00:53:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:30,779 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:30,779 INFO L515 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] [2022-02-11 00:53:30,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-02-11 00:53:30,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:30,979 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash -707981535, now seen corresponding path program 4 times [2022-02-11 00:53:30,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:30,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984542258] [2022-02-11 00:53:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:31,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:31,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984542258] [2022-02-11 00:53:31,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984542258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:31,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971233207] [2022-02-11 00:53:31,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:53:31,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:31,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:31,180 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:31,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-11 00:53:31,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:53:31,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:31,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:31,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:31,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:31,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:31,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:31,472 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 33 treesize of output 17 [2022-02-11 00:53:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:31,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:31,767 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:53:31,768 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 20 treesize of output 43 [2022-02-11 00:53:31,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:31,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:31,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:31,809 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 20 treesize of output 3 [2022-02-11 00:53:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:31,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971233207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:31,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:31,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:53:31,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972212812] [2022-02-11 00:53:31,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:31,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:53:31,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:53:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:53:31,825 INFO L87 Difference]: Start difference. First operand 2769 states and 9214 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:53:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:32,660 INFO L93 Difference]: Finished difference Result 3161 states and 10431 transitions. [2022-02-11 00:53:32,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:53:32,661 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:53:32,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:32,667 INFO L225 Difference]: With dead ends: 3161 [2022-02-11 00:53:32,667 INFO L226 Difference]: Without dead ends: 3155 [2022-02-11 00:53:32,667 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:53:32,667 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:32,667 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 173 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1113 Invalid, 0 Unknown, 629 Unchecked, 0.4s Time] [2022-02-11 00:53:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2022-02-11 00:53:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2773. [2022-02-11 00:53:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2772 states have (on average 3.327200577200577) internal successors, (9223), 2772 states have internal predecessors, (9223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 9223 transitions. [2022-02-11 00:53:32,706 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 9223 transitions. Word has length 24 [2022-02-11 00:53:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:32,706 INFO L470 AbstractCegarLoop]: Abstraction has 2773 states and 9223 transitions. [2022-02-11 00:53:32,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:53:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 9223 transitions. [2022-02-11 00:53:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:32,710 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:32,710 INFO L515 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] [2022-02-11 00:53:32,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-02-11 00:53:32,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:32,911 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:32,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1132045153, now seen corresponding path program 5 times [2022-02-11 00:53:32,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:32,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091500214] [2022-02-11 00:53:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:32,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:33,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:33,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091500214] [2022-02-11 00:53:33,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091500214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:33,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826693606] [2022-02-11 00:53:33,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:53:33,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:33,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:33,115 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:33,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-11 00:53:33,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:53:33,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:33,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:33,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:33,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:33,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:33,404 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 37 treesize of output 21 [2022-02-11 00:53:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:33,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:33,665 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:53:33,666 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 20 treesize of output 43 [2022-02-11 00:53:33,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:33,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:33,714 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 20 treesize of output 3 [2022-02-11 00:53:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:33,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826693606] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:33,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:33,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:53:33,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656342728] [2022-02-11 00:53:33,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:33,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:53:33,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:33,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:53:33,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:53:33,729 INFO L87 Difference]: Start difference. First operand 2773 states and 9223 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:34,793 INFO L93 Difference]: Finished difference Result 3090 states and 10233 transitions. [2022-02-11 00:53:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:53:34,794 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:34,800 INFO L225 Difference]: With dead ends: 3090 [2022-02-11 00:53:34,800 INFO L226 Difference]: Without dead ends: 3085 [2022-02-11 00:53:34,800 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:53:34,800 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 115 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:34,800 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 101 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 960 Invalid, 0 Unknown, 166 Unchecked, 0.7s Time] [2022-02-11 00:53:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-02-11 00:53:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2774. [2022-02-11 00:53:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 3.326721961774252) internal successors, (9225), 2773 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 9225 transitions. [2022-02-11 00:53:34,841 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 9225 transitions. Word has length 24 [2022-02-11 00:53:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:34,841 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 9225 transitions. [2022-02-11 00:53:34,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 9225 transitions. [2022-02-11 00:53:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:34,846 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:34,846 INFO L515 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] [2022-02-11 00:53:34,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:35,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:35,046 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:35,046 INFO L85 PathProgramCache]: Analyzing trace with hash -675409310, now seen corresponding path program 2 times [2022-02-11 00:53:35,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:35,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39943921] [2022-02-11 00:53:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:35,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:35,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:35,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39943921] [2022-02-11 00:53:35,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39943921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:35,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026054159] [2022-02-11 00:53:35,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:53:35,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:35,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:35,248 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:35,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-11 00:53:35,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:53:35,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:35,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:35,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:35,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:35,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:35,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:35,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:35,806 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 31 treesize of output 43 [2022-02-11 00:53:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:35,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:36,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:36,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:36,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:36,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:36,564 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 41 treesize of output 46 [2022-02-11 00:53:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:36,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026054159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:36,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:36,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-11 00:53:36,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344132006] [2022-02-11 00:53:36,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:36,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:53:36,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:36,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:53:36,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:53:36,663 INFO L87 Difference]: Start difference. First operand 2774 states and 9225 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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) [2022-02-11 00:53:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:37,377 INFO L93 Difference]: Finished difference Result 3203 states and 10594 transitions. [2022-02-11 00:53:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:53:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 [2022-02-11 00:53:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:37,384 INFO L225 Difference]: With dead ends: 3203 [2022-02-11 00:53:37,384 INFO L226 Difference]: Without dead ends: 3193 [2022-02-11 00:53:37,384 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:53:37,384 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:37,385 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 159 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 517 Invalid, 0 Unknown, 727 Unchecked, 0.2s Time] [2022-02-11 00:53:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2022-02-11 00:53:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2816. [2022-02-11 00:53:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 3.3232682060390766) internal successors, (9355), 2815 states have internal predecessors, (9355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 9355 transitions. [2022-02-11 00:53:37,425 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 9355 transitions. Word has length 24 [2022-02-11 00:53:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:37,425 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 9355 transitions. [2022-02-11 00:53:37,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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) [2022-02-11 00:53:37,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 9355 transitions. [2022-02-11 00:53:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:37,429 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:37,429 INFO L515 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] [2022-02-11 00:53:37,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-02-11 00:53:37,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-02-11 00:53:37,629 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1669518013, now seen corresponding path program 6 times [2022-02-11 00:53:37,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:37,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521009721] [2022-02-11 00:53:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:37,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:37,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:37,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521009721] [2022-02-11 00:53:37,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521009721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:37,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291368916] [2022-02-11 00:53:37,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:53:37,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:37,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:37,847 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:37,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-11 00:53:37,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:53:37,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:38,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:38,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:38,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:38,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:38,212 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 35 treesize of output 47 [2022-02-11 00:53:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:38,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:38,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:38,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:38,829 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 45 treesize of output 7 [2022-02-11 00:53:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:38,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291368916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:38,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:38,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:53:38,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496233420] [2022-02-11 00:53:38,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:38,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:53:38,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:53:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:53:38,858 INFO L87 Difference]: Start difference. First operand 2816 states and 9355 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:53:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:40,598 INFO L93 Difference]: Finished difference Result 3691 states and 12172 transitions. [2022-02-11 00:53:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:53:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:53:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:40,605 INFO L225 Difference]: With dead ends: 3691 [2022-02-11 00:53:40,606 INFO L226 Difference]: Without dead ends: 3679 [2022-02-11 00:53:40,606 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=396, Invalid=3264, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:53:40,606 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 248 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 951 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:40,606 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 159 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1247 Invalid, 0 Unknown, 951 Unchecked, 0.6s Time] [2022-02-11 00:53:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2022-02-11 00:53:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 2821. [2022-02-11 00:53:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 3.322340425531915) internal successors, (9369), 2820 states have internal predecessors, (9369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 9369 transitions. [2022-02-11 00:53:40,650 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 9369 transitions. Word has length 24 [2022-02-11 00:53:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:40,650 INFO L470 AbstractCegarLoop]: Abstraction has 2821 states and 9369 transitions. [2022-02-11 00:53:40,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:53:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 9369 transitions. [2022-02-11 00:53:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:40,655 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:40,655 INFO L515 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] [2022-02-11 00:53:40,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-02-11 00:53:40,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-02-11 00:53:40,855 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1797751905, now seen corresponding path program 7 times [2022-02-11 00:53:40,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:40,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944733941] [2022-02-11 00:53:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:40,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:41,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:41,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944733941] [2022-02-11 00:53:41,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944733941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:41,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692392297] [2022-02-11 00:53:41,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:53:41,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:41,091 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:41,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-11 00:53:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:41,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:41,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:41,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:41,369 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 33 treesize of output 17 [2022-02-11 00:53:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:41,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:41,627 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:53:41,627 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 20 treesize of output 43 [2022-02-11 00:53:41,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:41,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:41,675 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 20 treesize of output 3 [2022-02-11 00:53:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:41,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692392297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:41,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:41,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:53:41,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182981525] [2022-02-11 00:53:41,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:41,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:53:41,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:41,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:53:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:53:41,692 INFO L87 Difference]: Start difference. First operand 2821 states and 9369 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:43,041 INFO L93 Difference]: Finished difference Result 3239 states and 10730 transitions. [2022-02-11 00:53:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:53:43,041 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:43,048 INFO L225 Difference]: With dead ends: 3239 [2022-02-11 00:53:43,048 INFO L226 Difference]: Without dead ends: 3233 [2022-02-11 00:53:43,048 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:53:43,048 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:43,048 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 155 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1730 Invalid, 0 Unknown, 187 Unchecked, 0.7s Time] [2022-02-11 00:53:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2022-02-11 00:53:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2824. [2022-02-11 00:53:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2823 states have (on average 3.3209351753453773) internal successors, (9375), 2823 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 9375 transitions. [2022-02-11 00:53:43,095 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 9375 transitions. Word has length 24 [2022-02-11 00:53:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:43,095 INFO L470 AbstractCegarLoop]: Abstraction has 2824 states and 9375 transitions. [2022-02-11 00:53:43,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:43,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 9375 transitions. [2022-02-11 00:53:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:43,100 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:43,100 INFO L515 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] [2022-02-11 00:53:43,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:43,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:43,302 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:43,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:43,302 INFO L85 PathProgramCache]: Analyzing trace with hash -88843783, now seen corresponding path program 8 times [2022-02-11 00:53:43,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:43,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141726816] [2022-02-11 00:53:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:43,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:43,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:43,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141726816] [2022-02-11 00:53:43,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141726816] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:43,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373562073] [2022-02-11 00:53:43,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:53:43,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:43,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:43,543 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:43,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-11 00:53:43,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:53:43,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:43,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:53:43,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:43,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:43,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:43,779 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-02-11 00:53:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:44,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:44,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:44,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:44,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:44,510 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 41 treesize of output 56 [2022-02-11 00:53:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:44,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373562073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:44,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:44,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:53:44,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622091212] [2022-02-11 00:53:44,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:44,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:53:44,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:53:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:53:44,626 INFO L87 Difference]: Start difference. First operand 2824 states and 9375 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:46,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:46,143 INFO L93 Difference]: Finished difference Result 3894 states and 13205 transitions. [2022-02-11 00:53:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:53:46,143 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:53:46,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:46,150 INFO L225 Difference]: With dead ends: 3894 [2022-02-11 00:53:46,151 INFO L226 Difference]: Without dead ends: 3884 [2022-02-11 00:53:46,151 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=388, Invalid=2264, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:53:46,151 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 969 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:46,151 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 177 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1015 Invalid, 0 Unknown, 969 Unchecked, 0.4s Time] [2022-02-11 00:53:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2022-02-11 00:53:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2829. [2022-02-11 00:53:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 3.3185997171145685) internal successors, (9385), 2828 states have internal predecessors, (9385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 9385 transitions. [2022-02-11 00:53:46,197 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 9385 transitions. Word has length 24 [2022-02-11 00:53:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:46,197 INFO L470 AbstractCegarLoop]: Abstraction has 2829 states and 9385 transitions. [2022-02-11 00:53:46,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 9385 transitions. [2022-02-11 00:53:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:46,201 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:46,201 INFO L515 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] [2022-02-11 00:53:46,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:46,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-02-11 00:53:46,403 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1169351643, now seen corresponding path program 9 times [2022-02-11 00:53:46,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:46,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576543702] [2022-02-11 00:53:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:46,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:46,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:46,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576543702] [2022-02-11 00:53:46,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576543702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:46,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288622232] [2022-02-11 00:53:46,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:53:46,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:46,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:46,635 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:46,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-11 00:53:46,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:53:46,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:46,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:53:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:46,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:46,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:46,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:46,982 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 30 treesize of output 20 [2022-02-11 00:53:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:47,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:47,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:47,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:47,365 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 37 treesize of output 54 [2022-02-11 00:53:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:47,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288622232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:47,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:47,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:53:47,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925884979] [2022-02-11 00:53:47,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:47,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:53:47,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:47,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:53:47,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:53:47,454 INFO L87 Difference]: Start difference. First operand 2829 states and 9385 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-02-11 00:53:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:48,363 INFO L93 Difference]: Finished difference Result 3115 states and 10344 transitions. [2022-02-11 00:53:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:53:48,363 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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 [2022-02-11 00:53:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:48,369 INFO L225 Difference]: With dead ends: 3115 [2022-02-11 00:53:48,369 INFO L226 Difference]: Without dead ends: 3109 [2022-02-11 00:53:48,370 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:53:48,370 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 920 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:48,370 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 129 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1238 Invalid, 0 Unknown, 920 Unchecked, 0.5s Time] [2022-02-11 00:53:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-02-11 00:53:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2831. [2022-02-11 00:53:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 3.317667844522968) internal successors, (9389), 2830 states have internal predecessors, (9389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 9389 transitions. [2022-02-11 00:53:48,415 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 9389 transitions. Word has length 24 [2022-02-11 00:53:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:48,415 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 9389 transitions. [2022-02-11 00:53:48,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-02-11 00:53:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 9389 transitions. [2022-02-11 00:53:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:48,419 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:48,419 INFO L515 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] [2022-02-11 00:53:48,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:48,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-02-11 00:53:48,619 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash 979444893, now seen corresponding path program 10 times [2022-02-11 00:53:48,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:48,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429443739] [2022-02-11 00:53:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:48,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:48,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:48,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429443739] [2022-02-11 00:53:48,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429443739] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:48,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346530496] [2022-02-11 00:53:48,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:53:48,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:48,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:48,848 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:48,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-11 00:53:48,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:53:48,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:48,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:48,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:49,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:49,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:49,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:49,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:49,067 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 30 treesize of output 16 [2022-02-11 00:53:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:49,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:49,371 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:53:49,372 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 20 treesize of output 43 [2022-02-11 00:53:49,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:49,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:49,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:49,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:49,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:53:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:49,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346530496] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:49,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:49,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:53:49,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833516803] [2022-02-11 00:53:49,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:49,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:53:49,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:49,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:53:49,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:53:49,429 INFO L87 Difference]: Start difference. First operand 2831 states and 9389 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:53:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:50,368 INFO L93 Difference]: Finished difference Result 3104 states and 10273 transitions. [2022-02-11 00:53:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:53:50,368 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:53:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:50,374 INFO L225 Difference]: With dead ends: 3104 [2022-02-11 00:53:50,374 INFO L226 Difference]: Without dead ends: 3090 [2022-02-11 00:53:50,374 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:53:50,374 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 458 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:50,374 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 109 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1319 Invalid, 0 Unknown, 458 Unchecked, 0.5s Time] [2022-02-11 00:53:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2022-02-11 00:53:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2827. [2022-02-11 00:53:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 3.319532908704883) internal successors, (9381), 2826 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 9381 transitions. [2022-02-11 00:53:50,411 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 9381 transitions. Word has length 24 [2022-02-11 00:53:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:50,411 INFO L470 AbstractCegarLoop]: Abstraction has 2827 states and 9381 transitions. [2022-02-11 00:53:50,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:53:50,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 9381 transitions. [2022-02-11 00:53:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:50,415 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:50,415 INFO L515 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] [2022-02-11 00:53:50,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-02-11 00:53:50,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:50,615 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1715641972, now seen corresponding path program 20 times [2022-02-11 00:53:50,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:50,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000640613] [2022-02-11 00:53:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:50,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:50,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000640613] [2022-02-11 00:53:50,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000640613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:50,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910984386] [2022-02-11 00:53:50,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:53:50,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:50,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:50,802 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:50,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-11 00:53:50,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:53:50,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:50,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:53:50,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:51,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:51,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:51,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:51,304 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 33 treesize of output 21 [2022-02-11 00:53:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:51,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:51,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:51,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:51,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-02-11 00:53:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:51,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910984386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:51,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:51,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-02-11 00:53:51,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469425503] [2022-02-11 00:53:51,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:51,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:53:51,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:53:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:53:51,801 INFO L87 Difference]: Start difference. First operand 2827 states and 9381 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:53:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:53,616 INFO L93 Difference]: Finished difference Result 3858 states and 12515 transitions. [2022-02-11 00:53:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:53:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:53:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:53,624 INFO L225 Difference]: With dead ends: 3858 [2022-02-11 00:53:53,624 INFO L226 Difference]: Without dead ends: 3854 [2022-02-11 00:53:53,624 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=347, Invalid=2959, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:53:53,624 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 169 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1013 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:53,624 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 305 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2120 Invalid, 0 Unknown, 1013 Unchecked, 0.8s Time] [2022-02-11 00:53:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2022-02-11 00:53:53,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 2849. [2022-02-11 00:53:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.315308988764045) internal successors, (9442), 2848 states have internal predecessors, (9442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9442 transitions. [2022-02-11 00:53:53,672 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9442 transitions. Word has length 24 [2022-02-11 00:53:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:53,672 INFO L470 AbstractCegarLoop]: Abstraction has 2849 states and 9442 transitions. [2022-02-11 00:53:53,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:53:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9442 transitions. [2022-02-11 00:53:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:53,676 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:53,676 INFO L515 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] [2022-02-11 00:53:53,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-02-11 00:53:53,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-02-11 00:53:53,877 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:53,877 INFO L85 PathProgramCache]: Analyzing trace with hash 425277236, now seen corresponding path program 21 times [2022-02-11 00:53:53,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:53,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636277118] [2022-02-11 00:53:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:53,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:54,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:54,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636277118] [2022-02-11 00:53:54,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636277118] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:54,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862605938] [2022-02-11 00:53:54,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:53:54,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:54,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:54,063 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:54,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-11 00:53:54,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:53:54,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:54,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:53:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:54,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:54,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:54,375 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:53:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:54,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:55,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:55,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:55,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:53:55,030 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 41 treesize of output 56 [2022-02-11 00:53:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:55,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862605938] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:55,112 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:55,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-02-11 00:53:55,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987182945] [2022-02-11 00:53:55,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:55,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:53:55,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:53:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:53:55,112 INFO L87 Difference]: Start difference. First operand 2849 states and 9442 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:53:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:57,637 INFO L93 Difference]: Finished difference Result 4571 states and 14831 transitions. [2022-02-11 00:53:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-11 00:53:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:53:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:57,645 INFO L225 Difference]: With dead ends: 4571 [2022-02-11 00:53:57,646 INFO L226 Difference]: Without dead ends: 4548 [2022-02-11 00:53:57,646 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=609, Invalid=6701, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:53:57,646 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 243 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 3505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1898 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:57,646 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 334 Invalid, 3505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1570 Invalid, 0 Unknown, 1898 Unchecked, 0.7s Time] [2022-02-11 00:53:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2022-02-11 00:53:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2893. [2022-02-11 00:53:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2892 states have (on average 3.3029045643153525) internal successors, (9552), 2892 states have internal predecessors, (9552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 9552 transitions. [2022-02-11 00:53:57,701 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 9552 transitions. Word has length 24 [2022-02-11 00:53:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:57,701 INFO L470 AbstractCegarLoop]: Abstraction has 2893 states and 9552 transitions. [2022-02-11 00:53:57,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:53:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 9552 transitions. [2022-02-11 00:53:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:53:57,705 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:57,705 INFO L515 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] [2022-02-11 00:53:57,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-02-11 00:53:57,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:57,905 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:53:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:57,905 INFO L85 PathProgramCache]: Analyzing trace with hash -839168338, now seen corresponding path program 22 times [2022-02-11 00:53:57,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:57,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074462419] [2022-02-11 00:53:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:57,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:58,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:58,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074462419] [2022-02-11 00:53:58,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074462419] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:58,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120016688] [2022-02-11 00:53:58,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:53:58,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:58,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:58,094 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:53:58,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-11 00:53:58,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:53:58,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:58,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:53:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:58,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:58,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:58,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:58,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:58,375 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 37 treesize of output 21 [2022-02-11 00:53:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:58,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:58,677 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:53:58,677 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 20 treesize of output 43 [2022-02-11 00:53:58,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:58,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:53:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:53:58,731 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 20 treesize of output 3 [2022-02-11 00:53:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:58,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120016688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:58,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:58,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:53:58,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048774208] [2022-02-11 00:53:58,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:58,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:53:58,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:53:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:53:58,747 INFO L87 Difference]: Start difference. First operand 2893 states and 9552 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:00,335 INFO L93 Difference]: Finished difference Result 3909 states and 12712 transitions. [2022-02-11 00:54:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:54:00,336 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:00,343 INFO L225 Difference]: With dead ends: 3909 [2022-02-11 00:54:00,343 INFO L226 Difference]: Without dead ends: 3903 [2022-02-11 00:54:00,344 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=2393, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:54:00,344 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 203 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1388 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:00,344 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 272 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2051 Invalid, 0 Unknown, 1388 Unchecked, 0.8s Time] [2022-02-11 00:54:00,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2022-02-11 00:54:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 2884. [2022-02-11 00:54:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 3.3066250433576134) internal successors, (9533), 2883 states have internal predecessors, (9533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 9533 transitions. [2022-02-11 00:54:00,400 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 9533 transitions. Word has length 24 [2022-02-11 00:54:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:00,400 INFO L470 AbstractCegarLoop]: Abstraction has 2884 states and 9533 transitions. [2022-02-11 00:54:00,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 9533 transitions. [2022-02-11 00:54:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:00,404 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:00,404 INFO L515 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] [2022-02-11 00:54:00,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-02-11 00:54:00,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:00,604 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:00,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1168030766, now seen corresponding path program 23 times [2022-02-11 00:54:00,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:00,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251506617] [2022-02-11 00:54:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:00,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:00,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:00,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251506617] [2022-02-11 00:54:00,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251506617] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:00,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835898482] [2022-02-11 00:54:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:54:00,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:00,793 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:00,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-11 00:54:00,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:54:00,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:00,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:01,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:01,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:01,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:01,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:01,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:54:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:01,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:01,363 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:01,363 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 20 treesize of output 43 [2022-02-11 00:54:01,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:01,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:01,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:01,406 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 20 treesize of output 3 [2022-02-11 00:54:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:01,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835898482] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:01,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:01,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:01,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196579604] [2022-02-11 00:54:01,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:01,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:01,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:01,422 INFO L87 Difference]: Start difference. First operand 2884 states and 9533 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:02,719 INFO L93 Difference]: Finished difference Result 3563 states and 11679 transitions. [2022-02-11 00:54:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:54:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:02,726 INFO L225 Difference]: With dead ends: 3563 [2022-02-11 00:54:02,726 INFO L226 Difference]: Without dead ends: 3559 [2022-02-11 00:54:02,727 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:54:02,727 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 984 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:02,727 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 255 Invalid, 2652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1640 Invalid, 0 Unknown, 984 Unchecked, 0.6s Time] [2022-02-11 00:54:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2022-02-11 00:54:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2881. [2022-02-11 00:54:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.3072916666666665) internal successors, (9525), 2880 states have internal predecessors, (9525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9525 transitions. [2022-02-11 00:54:02,774 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9525 transitions. Word has length 24 [2022-02-11 00:54:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:02,774 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 9525 transitions. [2022-02-11 00:54:02,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9525 transitions. [2022-02-11 00:54:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:02,778 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:02,778 INFO L515 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] [2022-02-11 00:54:02,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-02-11 00:54:02,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:02,979 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1862490956, now seen corresponding path program 24 times [2022-02-11 00:54:02,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:02,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985259746] [2022-02-11 00:54:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:02,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:03,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:03,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985259746] [2022-02-11 00:54:03,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985259746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:03,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808814404] [2022-02-11 00:54:03,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:54:03,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:03,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:03,170 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:03,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-11 00:54:03,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:54:03,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:54:03,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:03,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:03,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:03,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:03,726 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 33 treesize of output 53 [2022-02-11 00:54:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:03,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:04,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:04,618 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 41 treesize of output 7 [2022-02-11 00:54:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:04,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808814404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:04,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:04,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:54:04,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941732170] [2022-02-11 00:54:04,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:04,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:54:04,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:04,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:54:04,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:54:04,649 INFO L87 Difference]: Start difference. First operand 2881 states and 9525 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:54:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:05,739 INFO L93 Difference]: Finished difference Result 3552 states and 11594 transitions. [2022-02-11 00:54:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:54:05,740 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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 [2022-02-11 00:54:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:05,746 INFO L225 Difference]: With dead ends: 3552 [2022-02-11 00:54:05,746 INFO L226 Difference]: Without dead ends: 3550 [2022-02-11 00:54:05,746 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:54:05,746 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 175 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1224 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:05,746 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 241 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 967 Invalid, 0 Unknown, 1224 Unchecked, 0.4s Time] [2022-02-11 00:54:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2022-02-11 00:54:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2881. [2022-02-11 00:54:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.307986111111111) internal successors, (9527), 2880 states have internal predecessors, (9527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9527 transitions. [2022-02-11 00:54:05,787 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9527 transitions. Word has length 24 [2022-02-11 00:54:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:05,787 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 9527 transitions. [2022-02-11 00:54:05,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:54:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9527 transitions. [2022-02-11 00:54:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:05,790 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:05,790 INFO L515 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] [2022-02-11 00:54:05,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-02-11 00:54:05,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:05,991 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:05,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2073766699, now seen corresponding path program 11 times [2022-02-11 00:54:05,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:05,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030016924] [2022-02-11 00:54:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:05,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:06,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:06,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030016924] [2022-02-11 00:54:06,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030016924] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:06,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217669506] [2022-02-11 00:54:06,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:54:06,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:06,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:06,182 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:06,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-11 00:54:06,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:54:06,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:06,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:06,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:06,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:06,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:06,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:06,469 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 37 treesize of output 21 [2022-02-11 00:54:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:06,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:06,750 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:06,750 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 20 treesize of output 43 [2022-02-11 00:54:06,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:06,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:06,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:06,800 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 20 treesize of output 3 [2022-02-11 00:54:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:06,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217669506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:06,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:06,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:06,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815720170] [2022-02-11 00:54:06,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:06,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:06,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:06,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:06,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:06,816 INFO L87 Difference]: Start difference. First operand 2881 states and 9527 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:08,423 INFO L93 Difference]: Finished difference Result 3635 states and 11750 transitions. [2022-02-11 00:54:08,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:54:08,424 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:08,431 INFO L225 Difference]: With dead ends: 3635 [2022-02-11 00:54:08,431 INFO L226 Difference]: Without dead ends: 3629 [2022-02-11 00:54:08,431 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:54:08,431 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 141 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:08,431 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 246 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2216 Invalid, 0 Unknown, 334 Unchecked, 0.8s Time] [2022-02-11 00:54:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-02-11 00:54:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 2899. [2022-02-11 00:54:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 3.303312629399586) internal successors, (9573), 2898 states have internal predecessors, (9573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 9573 transitions. [2022-02-11 00:54:08,480 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 9573 transitions. Word has length 24 [2022-02-11 00:54:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:08,480 INFO L470 AbstractCegarLoop]: Abstraction has 2899 states and 9573 transitions. [2022-02-11 00:54:08,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 9573 transitions. [2022-02-11 00:54:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:08,484 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:08,484 INFO L515 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] [2022-02-11 00:54:08,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-02-11 00:54:08,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-02-11 00:54:08,685 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash -80281389, now seen corresponding path program 12 times [2022-02-11 00:54:08,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:08,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175799002] [2022-02-11 00:54:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:08,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:08,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:08,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175799002] [2022-02-11 00:54:08,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175799002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:08,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320061097] [2022-02-11 00:54:08,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:54:08,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:08,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:08,881 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:08,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-11 00:54:08,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:54:08,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:08,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:09,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:09,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:09,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:09,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:09,157 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 33 treesize of output 17 [2022-02-11 00:54:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:09,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:09,435 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:09,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:54:09,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:09,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:09,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:09,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:09,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:54:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:09,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320061097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:09,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:09,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:09,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19631323] [2022-02-11 00:54:09,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:09,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:09,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:09,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:09,504 INFO L87 Difference]: Start difference. First operand 2899 states and 9573 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:11,037 INFO L93 Difference]: Finished difference Result 3653 states and 11797 transitions. [2022-02-11 00:54:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:54:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:11,044 INFO L225 Difference]: With dead ends: 3653 [2022-02-11 00:54:11,044 INFO L226 Difference]: Without dead ends: 3649 [2022-02-11 00:54:11,044 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:54:11,044 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:11,044 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 223 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1991 Invalid, 0 Unknown, 740 Unchecked, 0.8s Time] [2022-02-11 00:54:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2022-02-11 00:54:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 2897. [2022-02-11 00:54:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2896 states have (on average 3.304558011049724) internal successors, (9570), 2896 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 9570 transitions. [2022-02-11 00:54:11,089 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 9570 transitions. Word has length 24 [2022-02-11 00:54:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:11,089 INFO L470 AbstractCegarLoop]: Abstraction has 2897 states and 9570 transitions. [2022-02-11 00:54:11,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 9570 transitions. [2022-02-11 00:54:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:11,093 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:11,093 INFO L515 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] [2022-02-11 00:54:11,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-02-11 00:54:11,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:11,293 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:11,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1344726963, now seen corresponding path program 13 times [2022-02-11 00:54:11,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:11,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176413856] [2022-02-11 00:54:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:11,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:11,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:11,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176413856] [2022-02-11 00:54:11,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176413856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:11,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155305487] [2022-02-11 00:54:11,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:54:11,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:11,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:11,523 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:11,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-11 00:54:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:11,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:11,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:11,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:11,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:11,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:11,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:11,857 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 37 treesize of output 21 [2022-02-11 00:54:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:11,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:12,142 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:12,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:54:12,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:12,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:12,185 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 20 treesize of output 3 [2022-02-11 00:54:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:12,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155305487] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:12,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:12,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:12,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12914116] [2022-02-11 00:54:12,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:12,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:12,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:12,201 INFO L87 Difference]: Start difference. First operand 2897 states and 9570 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:13,860 INFO L93 Difference]: Finished difference Result 3770 states and 12207 transitions. [2022-02-11 00:54:13,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:54:13,861 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:13,868 INFO L225 Difference]: With dead ends: 3770 [2022-02-11 00:54:13,868 INFO L226 Difference]: Without dead ends: 3765 [2022-02-11 00:54:13,868 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:54:13,869 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 174 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:13,869 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 250 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2140 Invalid, 0 Unknown, 548 Unchecked, 0.8s Time] [2022-02-11 00:54:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2022-02-11 00:54:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 2894. [2022-02-11 00:54:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2893 states have (on average 3.3066021431040444) internal successors, (9566), 2893 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 9566 transitions. [2022-02-11 00:54:13,914 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 9566 transitions. Word has length 24 [2022-02-11 00:54:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:13,915 INFO L470 AbstractCegarLoop]: Abstraction has 2894 states and 9566 transitions. [2022-02-11 00:54:13,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 9566 transitions. [2022-02-11 00:54:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:13,919 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:13,919 INFO L515 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] [2022-02-11 00:54:13,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:14,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-02-11 00:54:14,119 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:14,119 INFO L85 PathProgramCache]: Analyzing trace with hash -298378899, now seen corresponding path program 14 times [2022-02-11 00:54:14,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:14,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788807759] [2022-02-11 00:54:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:14,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:14,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:14,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788807759] [2022-02-11 00:54:14,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788807759] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:14,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807763248] [2022-02-11 00:54:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:54:14,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:14,328 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:14,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-11 00:54:14,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:54:14,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:14,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:14,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:14,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:14,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:14,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:14,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-02-11 00:54:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:14,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:15,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:15,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:15,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:15,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:15,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-02-11 00:54:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:15,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807763248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:15,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:15,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:54:15,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340187267] [2022-02-11 00:54:15,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:15,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:54:15,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:54:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:54:15,311 INFO L87 Difference]: Start difference. First operand 2894 states and 9566 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:54:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:17,200 INFO L93 Difference]: Finished difference Result 3599 states and 11791 transitions. [2022-02-11 00:54:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:54:17,200 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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 [2022-02-11 00:54:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:17,207 INFO L225 Difference]: With dead ends: 3599 [2022-02-11 00:54:17,208 INFO L226 Difference]: Without dead ends: 3588 [2022-02-11 00:54:17,208 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=399, Invalid=3761, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:54:17,208 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:17,208 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 226 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1504 Invalid, 0 Unknown, 736 Unchecked, 0.6s Time] [2022-02-11 00:54:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-02-11 00:54:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 2903. [2022-02-11 00:54:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 3.304272915230875) internal successors, (9589), 2902 states have internal predecessors, (9589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 9589 transitions. [2022-02-11 00:54:17,252 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 9589 transitions. Word has length 24 [2022-02-11 00:54:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:17,252 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 9589 transitions. [2022-02-11 00:54:17,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:54:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 9589 transitions. [2022-02-11 00:54:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:17,256 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:17,256 INFO L515 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] [2022-02-11 00:54:17,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:17,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-02-11 00:54:17,457 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2095330258, now seen corresponding path program 3 times [2022-02-11 00:54:17,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:17,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292449702] [2022-02-11 00:54:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:17,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:17,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:17,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292449702] [2022-02-11 00:54:17,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292449702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:17,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072569314] [2022-02-11 00:54:17,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:54:17,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:17,644 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:17,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-11 00:54:17,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:54:17,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:17,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:54:17,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:17,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:17,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:17,968 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:54:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:18,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:18,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:18,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:18,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:18,616 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 41 treesize of output 56 [2022-02-11 00:54:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:18,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072569314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:18,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:18,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-02-11 00:54:18,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306708211] [2022-02-11 00:54:18,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:18,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:54:18,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:54:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:54:18,696 INFO L87 Difference]: Start difference. First operand 2903 states and 9589 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:54:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:21,235 INFO L93 Difference]: Finished difference Result 4287 states and 14504 transitions. [2022-02-11 00:54:21,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:54:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:54:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:21,244 INFO L225 Difference]: With dead ends: 4287 [2022-02-11 00:54:21,245 INFO L226 Difference]: Without dead ends: 4283 [2022-02-11 00:54:21,245 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=534, Invalid=4722, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 00:54:21,245 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 156 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1308 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:21,245 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 187 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 839 Invalid, 0 Unknown, 1308 Unchecked, 0.3s Time] [2022-02-11 00:54:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2022-02-11 00:54:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 2917. [2022-02-11 00:54:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 3.300068587105624) internal successors, (9623), 2916 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 9623 transitions. [2022-02-11 00:54:21,300 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 9623 transitions. Word has length 24 [2022-02-11 00:54:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:21,301 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 9623 transitions. [2022-02-11 00:54:21,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:54:21,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 9623 transitions. [2022-02-11 00:54:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:21,305 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:21,305 INFO L515 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] [2022-02-11 00:54:21,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-02-11 00:54:21,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-02-11 00:54:21,505 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:21,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash -485076915, now seen corresponding path program 15 times [2022-02-11 00:54:21,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:21,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439649245] [2022-02-11 00:54:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:21,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:21,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:21,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439649245] [2022-02-11 00:54:21,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439649245] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:21,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831743425] [2022-02-11 00:54:21,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:54:21,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:21,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:21,706 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:21,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-11 00:54:21,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:54:21,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:21,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:54:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:22,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:22,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:22,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:22,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:22,011 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:54:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:22,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:22,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:22,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:22,645 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 41 treesize of output 56 [2022-02-11 00:54:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:22,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831743425] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:22,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:22,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:54:22,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196566801] [2022-02-11 00:54:22,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:22,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:54:22,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:22,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:54:22,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:54:22,717 INFO L87 Difference]: Start difference. First operand 2917 states and 9623 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:23,440 INFO L93 Difference]: Finished difference Result 4262 states and 14510 transitions. [2022-02-11 00:54:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:54:23,441 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:54:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:23,449 INFO L225 Difference]: With dead ends: 4262 [2022-02-11 00:54:23,450 INFO L226 Difference]: Without dead ends: 4257 [2022-02-11 00:54:23,450 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:54:23,450 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 164 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1343 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:23,450 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 212 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 452 Invalid, 0 Unknown, 1343 Unchecked, 0.2s Time] [2022-02-11 00:54:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2022-02-11 00:54:23,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 2954. [2022-02-11 00:54:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.3064679986454455) internal successors, (9764), 2953 states have internal predecessors, (9764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9764 transitions. [2022-02-11 00:54:23,504 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9764 transitions. Word has length 24 [2022-02-11 00:54:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:23,504 INFO L470 AbstractCegarLoop]: Abstraction has 2954 states and 9764 transitions. [2022-02-11 00:54:23,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9764 transitions. [2022-02-11 00:54:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:23,508 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:23,508 INFO L515 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] [2022-02-11 00:54:23,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-02-11 00:54:23,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:23,709 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:23,709 INFO L85 PathProgramCache]: Analyzing trace with hash 932179860, now seen corresponding path program 4 times [2022-02-11 00:54:23,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:23,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64769722] [2022-02-11 00:54:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:23,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:23,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:23,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64769722] [2022-02-11 00:54:23,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64769722] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:23,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653221888] [2022-02-11 00:54:23,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:54:23,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:23,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:23,906 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:23,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-11 00:54:23,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:54:23,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:23,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:24,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:24,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:24,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:24,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:24,196 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 37 treesize of output 21 [2022-02-11 00:54:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:24,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:24,478 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:24,478 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 20 treesize of output 43 [2022-02-11 00:54:24,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:24,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:24,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:24,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:24,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:54:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:24,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653221888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:24,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:24,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:24,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334057083] [2022-02-11 00:54:24,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:24,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:24,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:24,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:24,559 INFO L87 Difference]: Start difference. First operand 2954 states and 9764 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:26,072 INFO L93 Difference]: Finished difference Result 3975 states and 12950 transitions. [2022-02-11 00:54:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:54:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:26,080 INFO L225 Difference]: With dead ends: 3975 [2022-02-11 00:54:26,080 INFO L226 Difference]: Without dead ends: 3969 [2022-02-11 00:54:26,080 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:54:26,080 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 219 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:26,080 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 221 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1859 Invalid, 0 Unknown, 1199 Unchecked, 0.7s Time] [2022-02-11 00:54:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2022-02-11 00:54:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 2940. [2022-02-11 00:54:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.307587614834978) internal successors, (9721), 2939 states have internal predecessors, (9721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9721 transitions. [2022-02-11 00:54:26,131 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9721 transitions. Word has length 24 [2022-02-11 00:54:26,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:26,131 INFO L470 AbstractCegarLoop]: Abstraction has 2940 states and 9721 transitions. [2022-02-11 00:54:26,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:26,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9721 transitions. [2022-02-11 00:54:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:26,136 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:26,136 INFO L515 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] [2022-02-11 00:54:26,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-02-11 00:54:26,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:26,336 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -611607669, now seen corresponding path program 16 times [2022-02-11 00:54:26,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:26,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248821161] [2022-02-11 00:54:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:26,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:26,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:26,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248821161] [2022-02-11 00:54:26,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248821161] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:26,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359311101] [2022-02-11 00:54:26,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:54:26,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:26,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:26,546 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:26,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-11 00:54:26,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:54:26,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:26,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:26,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:26,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:26,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:26,824 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 33 treesize of output 17 [2022-02-11 00:54:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:26,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:27,083 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:27,083 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 20 treesize of output 43 [2022-02-11 00:54:27,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:27,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:27,124 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 20 treesize of output 3 [2022-02-11 00:54:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:27,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359311101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:27,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:27,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:54:27,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623976279] [2022-02-11 00:54:27,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:27,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:54:27,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:54:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:54:27,140 INFO L87 Difference]: Start difference. First operand 2940 states and 9721 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:28,696 INFO L93 Difference]: Finished difference Result 4059 states and 13380 transitions. [2022-02-11 00:54:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:54:28,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:54:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:28,704 INFO L225 Difference]: With dead ends: 4059 [2022-02-11 00:54:28,704 INFO L226 Difference]: Without dead ends: 4053 [2022-02-11 00:54:28,704 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=369, Invalid=2823, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:54:28,704 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 174 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:28,704 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 176 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1258 Invalid, 0 Unknown, 193 Unchecked, 0.6s Time] [2022-02-11 00:54:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2022-02-11 00:54:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 2954. [2022-02-11 00:54:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.304436166610227) internal successors, (9758), 2953 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9758 transitions. [2022-02-11 00:54:28,753 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9758 transitions. Word has length 24 [2022-02-11 00:54:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:28,753 INFO L470 AbstractCegarLoop]: Abstraction has 2954 states and 9758 transitions. [2022-02-11 00:54:28,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9758 transitions. [2022-02-11 00:54:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:28,758 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:28,758 INFO L515 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] [2022-02-11 00:54:28,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-02-11 00:54:28,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:28,958 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1875905164, now seen corresponding path program 5 times [2022-02-11 00:54:28,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:28,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451393050] [2022-02-11 00:54:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:28,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:29,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:29,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451393050] [2022-02-11 00:54:29,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451393050] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:29,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339210459] [2022-02-11 00:54:29,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:54:29,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:29,163 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:29,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-11 00:54:29,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:54:29,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:29,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:29,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:29,444 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 33 treesize of output 17 [2022-02-11 00:54:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:29,718 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:29,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:54:29,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:29,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:29,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:54:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:29,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339210459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:29,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:29,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:54:29,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330723925] [2022-02-11 00:54:29,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:29,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:54:29,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:29,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:54:29,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:54:29,787 INFO L87 Difference]: Start difference. First operand 2954 states and 9758 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:31,267 INFO L93 Difference]: Finished difference Result 4296 states and 14293 transitions. [2022-02-11 00:54:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:54:31,267 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:54:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:31,276 INFO L225 Difference]: With dead ends: 4296 [2022-02-11 00:54:31,276 INFO L226 Difference]: Without dead ends: 4286 [2022-02-11 00:54:31,276 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=301, Invalid=2779, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:54:31,276 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:31,276 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 259 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1489 Invalid, 0 Unknown, 740 Unchecked, 0.6s Time] [2022-02-11 00:54:31,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2022-02-11 00:54:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 2949. [2022-02-11 00:54:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 3.305291723202171) internal successors, (9744), 2948 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 9744 transitions. [2022-02-11 00:54:31,343 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 9744 transitions. Word has length 24 [2022-02-11 00:54:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:31,344 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 9744 transitions. [2022-02-11 00:54:31,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 9744 transitions. [2022-02-11 00:54:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:31,347 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:31,348 INFO L515 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] [2022-02-11 00:54:31,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-02-11 00:54:31,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:31,548 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:31,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:31,548 INFO L85 PathProgramCache]: Analyzing trace with hash 545643768, now seen corresponding path program 25 times [2022-02-11 00:54:31,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:31,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49466439] [2022-02-11 00:54:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:31,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:31,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:31,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49466439] [2022-02-11 00:54:31,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49466439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:31,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447076111] [2022-02-11 00:54:31,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:54:31,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:31,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:31,741 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:31,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-11 00:54:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:31,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:32,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:32,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:32,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:32,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:32,036 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 33 treesize of output 17 [2022-02-11 00:54:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:32,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:32,320 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:32,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:54:32,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:32,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:32,360 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 20 treesize of output 3 [2022-02-11 00:54:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:32,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447076111] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:32,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:32,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:32,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861497092] [2022-02-11 00:54:32,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:32,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:32,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:32,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:32,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:32,376 INFO L87 Difference]: Start difference. First operand 2949 states and 9744 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:34,083 INFO L93 Difference]: Finished difference Result 3471 states and 11419 transitions. [2022-02-11 00:54:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:54:34,083 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:34,090 INFO L225 Difference]: With dead ends: 3471 [2022-02-11 00:54:34,090 INFO L226 Difference]: Without dead ends: 3465 [2022-02-11 00:54:34,090 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=298, Invalid=3008, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:54:34,090 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 171 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:34,090 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 191 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2069 Invalid, 0 Unknown, 658 Unchecked, 0.8s Time] [2022-02-11 00:54:34,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2022-02-11 00:54:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 2959. [2022-02-11 00:54:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2958 states have (on average 3.3045977011494254) internal successors, (9775), 2958 states have internal predecessors, (9775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 9775 transitions. [2022-02-11 00:54:34,134 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 9775 transitions. Word has length 24 [2022-02-11 00:54:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:34,134 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 9775 transitions. [2022-02-11 00:54:34,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 9775 transitions. [2022-02-11 00:54:34,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:34,139 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:34,139 INFO L515 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] [2022-02-11 00:54:34,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-02-11 00:54:34,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:34,339 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:34,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1251307591, now seen corresponding path program 4 times [2022-02-11 00:54:34,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:34,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211007777] [2022-02-11 00:54:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:34,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:34,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:34,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211007777] [2022-02-11 00:54:34,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211007777] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:34,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221085938] [2022-02-11 00:54:34,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:54:34,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:34,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:34,530 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:34,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-11 00:54:34,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:54:34,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:34,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:34,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:34,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:34,824 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 37 treesize of output 21 [2022-02-11 00:54:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:34,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:35,114 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:35,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:54:35,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:35,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:35,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:35,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:35,156 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 20 treesize of output 3 [2022-02-11 00:54:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:35,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221085938] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:35,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:35,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:35,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642365688] [2022-02-11 00:54:35,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:35,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:35,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:35,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:35,172 INFO L87 Difference]: Start difference. First operand 2959 states and 9775 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:36,993 INFO L93 Difference]: Finished difference Result 3567 states and 11758 transitions. [2022-02-11 00:54:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:54:36,993 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:37,000 INFO L225 Difference]: With dead ends: 3567 [2022-02-11 00:54:37,001 INFO L226 Difference]: Without dead ends: 3561 [2022-02-11 00:54:37,001 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=297, Invalid=2895, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:54:37,001 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 139 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 751 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:37,012 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 181 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2329 Invalid, 0 Unknown, 751 Unchecked, 0.9s Time] [2022-02-11 00:54:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2022-02-11 00:54:37,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2967. [2022-02-11 00:54:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2966 states have (on average 3.3031018206338505) internal successors, (9797), 2966 states have internal predecessors, (9797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 9797 transitions. [2022-02-11 00:54:37,055 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 9797 transitions. Word has length 24 [2022-02-11 00:54:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:37,055 INFO L470 AbstractCegarLoop]: Abstraction has 2967 states and 9797 transitions. [2022-02-11 00:54:37,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 9797 transitions. [2022-02-11 00:54:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:37,060 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:37,060 INFO L515 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] [2022-02-11 00:54:37,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-02-11 00:54:37,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-02-11 00:54:37,261 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:37,261 INFO L85 PathProgramCache]: Analyzing trace with hash 123902901, now seen corresponding path program 5 times [2022-02-11 00:54:37,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:37,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706137430] [2022-02-11 00:54:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:37,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:37,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:37,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706137430] [2022-02-11 00:54:37,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706137430] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:37,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134340263] [2022-02-11 00:54:37,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:54:37,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:37,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:37,454 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:37,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-11 00:54:37,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:54:37,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:37,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:37,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:37,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:37,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:37,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:37,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:37,779 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 37 treesize of output 21 [2022-02-11 00:54:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:37,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:38,064 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:38,064 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 20 treesize of output 43 [2022-02-11 00:54:38,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:38,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:38,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:38,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:38,115 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 20 treesize of output 3 [2022-02-11 00:54:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:38,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134340263] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:38,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:38,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:38,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512919259] [2022-02-11 00:54:38,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:38,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:38,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:38,131 INFO L87 Difference]: Start difference. First operand 2967 states and 9797 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:39,239 INFO L93 Difference]: Finished difference Result 3430 states and 11290 transitions. [2022-02-11 00:54:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:54:39,239 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:39,246 INFO L225 Difference]: With dead ends: 3430 [2022-02-11 00:54:39,246 INFO L226 Difference]: Without dead ends: 3428 [2022-02-11 00:54:39,246 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:54:39,246 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:39,246 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 140 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1212 Invalid, 0 Unknown, 395 Unchecked, 0.5s Time] [2022-02-11 00:54:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2022-02-11 00:54:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 2966. [2022-02-11 00:54:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 3.303204047217538) internal successors, (9794), 2965 states have internal predecessors, (9794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 9794 transitions. [2022-02-11 00:54:39,289 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 9794 transitions. Word has length 24 [2022-02-11 00:54:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:39,289 INFO L470 AbstractCegarLoop]: Abstraction has 2966 states and 9794 transitions. [2022-02-11 00:54:39,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 9794 transitions. [2022-02-11 00:54:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:39,293 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:39,293 INFO L515 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] [2022-02-11 00:54:39,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:39,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-02-11 00:54:39,494 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:39,494 INFO L85 PathProgramCache]: Analyzing trace with hash 674726487, now seen corresponding path program 17 times [2022-02-11 00:54:39,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:39,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143021256] [2022-02-11 00:54:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:39,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:39,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:39,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143021256] [2022-02-11 00:54:39,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143021256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:39,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639353855] [2022-02-11 00:54:39,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:54:39,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:39,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:39,684 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:39,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-11 00:54:39,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:54:39,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:39,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:39,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:39,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:39,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:39,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:39,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:39,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:54:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:40,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:40,282 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:40,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:54:40,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:40,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:40,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:40,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:40,331 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 20 treesize of output 3 [2022-02-11 00:54:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:40,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639353855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:40,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:40,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:40,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427098828] [2022-02-11 00:54:40,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:40,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:40,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:40,347 INFO L87 Difference]: Start difference. First operand 2966 states and 9794 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:41,313 INFO L93 Difference]: Finished difference Result 3474 states and 11435 transitions. [2022-02-11 00:54:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:54:41,313 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:41,320 INFO L225 Difference]: With dead ends: 3474 [2022-02-11 00:54:41,320 INFO L226 Difference]: Without dead ends: 3468 [2022-02-11 00:54:41,320 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:54:41,320 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 116 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:41,320 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 187 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1348 Invalid, 0 Unknown, 269 Unchecked, 0.5s Time] [2022-02-11 00:54:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2022-02-11 00:54:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 2969. [2022-02-11 00:54:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2968 states have (on average 3.30222371967655) internal successors, (9801), 2968 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 9801 transitions. [2022-02-11 00:54:41,364 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 9801 transitions. Word has length 24 [2022-02-11 00:54:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:41,364 INFO L470 AbstractCegarLoop]: Abstraction has 2969 states and 9801 transitions. [2022-02-11 00:54:41,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 9801 transitions. [2022-02-11 00:54:41,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:41,368 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:41,368 INFO L515 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] [2022-02-11 00:54:41,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-02-11 00:54:41,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-02-11 00:54:41,569 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:41,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:41,569 INFO L85 PathProgramCache]: Analyzing trace with hash -589719087, now seen corresponding path program 18 times [2022-02-11 00:54:41,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:41,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088018538] [2022-02-11 00:54:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:41,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:41,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:41,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088018538] [2022-02-11 00:54:41,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088018538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:41,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678456788] [2022-02-11 00:54:41,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:54:41,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:41,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:41,760 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:41,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-11 00:54:41,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:54:41,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:54:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:42,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:42,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:42,330 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 29 treesize of output 49 [2022-02-11 00:54:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:42,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:43,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:43,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:43,269 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 41 treesize of output 7 [2022-02-11 00:54:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:43,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678456788] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:43,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:43,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:54:43,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251826111] [2022-02-11 00:54:43,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:43,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:54:43,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:54:43,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:54:43,300 INFO L87 Difference]: Start difference. First operand 2969 states and 9801 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:54:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:44,336 INFO L93 Difference]: Finished difference Result 3533 states and 11572 transitions. [2022-02-11 00:54:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:54:44,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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 [2022-02-11 00:54:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:44,343 INFO L225 Difference]: With dead ends: 3533 [2022-02-11 00:54:44,343 INFO L226 Difference]: Without dead ends: 3523 [2022-02-11 00:54:44,343 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=232, Invalid=2218, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:54:44,343 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 130 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:44,343 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 252 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 996 Invalid, 0 Unknown, 508 Unchecked, 0.4s Time] [2022-02-11 00:54:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2022-02-11 00:54:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 2977. [2022-02-11 00:54:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.3010752688172045) internal successors, (9824), 2976 states have internal predecessors, (9824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9824 transitions. [2022-02-11 00:54:44,389 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9824 transitions. Word has length 24 [2022-02-11 00:54:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:44,389 INFO L470 AbstractCegarLoop]: Abstraction has 2977 states and 9824 transitions. [2022-02-11 00:54:44,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2022-02-11 00:54:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9824 transitions. [2022-02-11 00:54:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:44,394 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:44,394 INFO L515 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] [2022-02-11 00:54:44,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:44,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-02-11 00:54:44,594 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1122224872, now seen corresponding path program 6 times [2022-02-11 00:54:44,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:44,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497076837] [2022-02-11 00:54:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:44,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:44,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:44,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497076837] [2022-02-11 00:54:44,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497076837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:44,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608553152] [2022-02-11 00:54:44,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:54:44,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:44,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:44,786 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:44,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-11 00:54:44,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:54:44,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:44,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:44,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:45,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:45,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:45,076 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 33 treesize of output 17 [2022-02-11 00:54:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:45,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:45,369 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:45,369 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 20 treesize of output 43 [2022-02-11 00:54:45,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:45,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:45,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:45,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:54:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:45,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608553152] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:45,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:45,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:54:45,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605166439] [2022-02-11 00:54:45,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:45,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:54:45,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:54:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:54:45,436 INFO L87 Difference]: Start difference. First operand 2977 states and 9824 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:46,943 INFO L93 Difference]: Finished difference Result 3598 states and 11823 transitions. [2022-02-11 00:54:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:54:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:54:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:46,950 INFO L225 Difference]: With dead ends: 3598 [2022-02-11 00:54:46,950 INFO L226 Difference]: Without dead ends: 3592 [2022-02-11 00:54:46,951 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=257, Invalid=2395, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:54:46,951 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 210 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:46,951 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 148 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1819 Invalid, 0 Unknown, 615 Unchecked, 0.7s Time] [2022-02-11 00:54:46,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2022-02-11 00:54:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 2970. [2022-02-11 00:54:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 3.303469181542607) internal successors, (9808), 2969 states have internal predecessors, (9808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:47,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 9808 transitions. [2022-02-11 00:54:47,006 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 9808 transitions. Word has length 24 [2022-02-11 00:54:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:47,006 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 9808 transitions. [2022-02-11 00:54:47,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:54:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 9808 transitions. [2022-02-11 00:54:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:47,011 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:47,011 INFO L515 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] [2022-02-11 00:54:47,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:47,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-02-11 00:54:47,211 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash -57853730, now seen corresponding path program 26 times [2022-02-11 00:54:47,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:47,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266159095] [2022-02-11 00:54:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:47,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:47,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:47,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266159095] [2022-02-11 00:54:47,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266159095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:47,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817981032] [2022-02-11 00:54:47,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:54:47,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:47,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:47,403 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:47,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-11 00:54:47,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:54:47,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:47,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:47,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:47,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:47,755 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 35 treesize of output 47 [2022-02-11 00:54:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:47,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:48,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:48,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:48,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:48,382 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 45 treesize of output 7 [2022-02-11 00:54:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:48,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817981032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:48,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:48,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:54:48,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801524067] [2022-02-11 00:54:48,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:48,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:54:48,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:54:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:54:48,410 INFO L87 Difference]: Start difference. First operand 2970 states and 9808 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:54:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:50,651 INFO L93 Difference]: Finished difference Result 4051 states and 13632 transitions. [2022-02-11 00:54:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:54:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:54:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:50,660 INFO L225 Difference]: With dead ends: 4051 [2022-02-11 00:54:50,660 INFO L226 Difference]: Without dead ends: 4039 [2022-02-11 00:54:50,672 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=509, Invalid=5041, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:54:50,672 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 263 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1510 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:50,672 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 193 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1403 Invalid, 0 Unknown, 1510 Unchecked, 0.6s Time] [2022-02-11 00:54:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2022-02-11 00:54:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2993. [2022-02-11 00:54:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 3.304812834224599) internal successors, (9888), 2992 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 9888 transitions. [2022-02-11 00:54:50,718 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 9888 transitions. Word has length 24 [2022-02-11 00:54:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:50,718 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 9888 transitions. [2022-02-11 00:54:50,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:54:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 9888 transitions. [2022-02-11 00:54:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:50,723 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:50,723 INFO L515 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] [2022-02-11 00:54:50,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-02-11 00:54:50,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:50,923 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1713164960, now seen corresponding path program 27 times [2022-02-11 00:54:50,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:50,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833865738] [2022-02-11 00:54:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:50,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:51,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:51,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833865738] [2022-02-11 00:54:51,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833865738] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:51,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835508291] [2022-02-11 00:54:51,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:54:51,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:51,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:51,115 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:51,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-11 00:54:51,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:54:51,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:54:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:51,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:51,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:51,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:51,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:51,550 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 29 treesize of output 17 [2022-02-11 00:54:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:51,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:51,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:51,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:51,907 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 37 treesize of output 54 [2022-02-11 00:54:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:52,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835508291] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:52,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:52,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:54:52,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911108883] [2022-02-11 00:54:52,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:52,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:54:52,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:54:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:54:52,003 INFO L87 Difference]: Start difference. First operand 2993 states and 9888 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:54:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:53,340 INFO L93 Difference]: Finished difference Result 3720 states and 12312 transitions. [2022-02-11 00:54:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:54:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 [2022-02-11 00:54:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:53,348 INFO L225 Difference]: With dead ends: 3720 [2022-02-11 00:54:53,348 INFO L226 Difference]: Without dead ends: 3714 [2022-02-11 00:54:53,349 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=309, Invalid=2553, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:54:53,349 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:53,349 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 139 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1266 Invalid, 0 Unknown, 411 Unchecked, 0.5s Time] [2022-02-11 00:54:53,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2022-02-11 00:54:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3006. [2022-02-11 00:54:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.304159733777038) internal successors, (9929), 3005 states have internal predecessors, (9929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9929 transitions. [2022-02-11 00:54:53,395 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9929 transitions. Word has length 24 [2022-02-11 00:54:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:53,395 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 9929 transitions. [2022-02-11 00:54:53,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:54:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9929 transitions. [2022-02-11 00:54:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:53,399 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:53,399 INFO L515 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] [2022-02-11 00:54:53,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-02-11 00:54:53,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-02-11 00:54:53,600 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1968870974, now seen corresponding path program 28 times [2022-02-11 00:54:53,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:53,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698027496] [2022-02-11 00:54:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:53,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:53,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:53,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698027496] [2022-02-11 00:54:53,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698027496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:53,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512208753] [2022-02-11 00:54:53,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:54:53,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:53,793 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:53,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-11 00:54:53,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:54:53,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:53,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:54,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:54,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:54,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-02-11 00:54:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:54,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:54,394 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:54:54,394 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 20 treesize of output 43 [2022-02-11 00:54:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:54,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:54,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:54:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:54,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512208753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:54,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:54,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:54:54,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314242084] [2022-02-11 00:54:54,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:54,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:54:54,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:54,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:54:54,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:54:54,452 INFO L87 Difference]: Start difference. First operand 3006 states and 9929 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:55,937 INFO L93 Difference]: Finished difference Result 3727 states and 12338 transitions. [2022-02-11 00:54:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:54:55,938 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:54:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:55,945 INFO L225 Difference]: With dead ends: 3727 [2022-02-11 00:54:55,945 INFO L226 Difference]: Without dead ends: 3721 [2022-02-11 00:54:55,945 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=300, Invalid=2456, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:54:55,945 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 149 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:55,945 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 213 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1719 Invalid, 0 Unknown, 393 Unchecked, 0.7s Time] [2022-02-11 00:54:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-02-11 00:54:55,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 2999. [2022-02-11 00:54:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 3.304202801867912) internal successors, (9906), 2998 states have internal predecessors, (9906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 9906 transitions. [2022-02-11 00:54:55,991 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 9906 transitions. Word has length 24 [2022-02-11 00:54:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:55,991 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 9906 transitions. [2022-02-11 00:54:55,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 9906 transitions. [2022-02-11 00:54:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:54:55,995 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:55,996 INFO L515 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] [2022-02-11 00:54:56,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-02-11 00:54:56,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-02-11 00:54:56,196 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:54:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash 161416511, now seen corresponding path program 6 times [2022-02-11 00:54:56,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:56,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168864573] [2022-02-11 00:54:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:56,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:56,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168864573] [2022-02-11 00:54:56,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168864573] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:56,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998606773] [2022-02-11 00:54:56,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:54:56,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:56,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:56,387 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:54:56,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-11 00:54:56,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:54:56,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:54:56,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:56,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:56,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:56,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:56,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:54:56,733 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 35 treesize of output 47 [2022-02-11 00:54:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:56,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:57,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:57,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:57,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:54:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:54:57,339 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 45 treesize of output 7 [2022-02-11 00:54:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:57,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998606773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:57,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:57,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:54:57,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735139070] [2022-02-11 00:54:57,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:57,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:54:57,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:57,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:54:57,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:54:57,368 INFO L87 Difference]: Start difference. First operand 2999 states and 9906 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:55:00,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:00,862 INFO L93 Difference]: Finished difference Result 4885 states and 16541 transitions. [2022-02-11 00:55:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 00:55:00,862 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:55:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:00,872 INFO L225 Difference]: With dead ends: 4885 [2022-02-11 00:55:00,873 INFO L226 Difference]: Without dead ends: 4875 [2022-02-11 00:55:00,873 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=803, Invalid=7753, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 00:55:00,873 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 249 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1180 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:00,874 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 223 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1727 Invalid, 0 Unknown, 1180 Unchecked, 0.8s Time] [2022-02-11 00:55:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-02-11 00:55:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3029. [2022-02-11 00:55:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.3051519154557463) internal successors, (10008), 3028 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 10008 transitions. [2022-02-11 00:55:00,950 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 10008 transitions. Word has length 24 [2022-02-11 00:55:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:00,950 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 10008 transitions. [2022-02-11 00:55:00,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:55:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 10008 transitions. [2022-02-11 00:55:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:00,954 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:00,954 INFO L515 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] [2022-02-11 00:55:00,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-02-11 00:55:01,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:01,155 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:01,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1854805089, now seen corresponding path program 19 times [2022-02-11 00:55:01,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:01,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956430102] [2022-02-11 00:55:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:01,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:01,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:01,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956430102] [2022-02-11 00:55:01,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956430102] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:01,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655730792] [2022-02-11 00:55:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:55:01,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:01,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:01,347 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:01,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-11 00:55:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:01,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:01,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:01,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:01,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:01,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:01,633 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 33 treesize of output 17 [2022-02-11 00:55:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:01,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:01,893 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:01,893 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 20 treesize of output 43 [2022-02-11 00:55:01,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:01,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:01,936 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 20 treesize of output 3 [2022-02-11 00:55:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:01,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655730792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:01,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:01,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:55:01,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258255030] [2022-02-11 00:55:01,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:01,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:55:01,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:55:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:55:01,952 INFO L87 Difference]: Start difference. First operand 3029 states and 10008 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:03,445 INFO L93 Difference]: Finished difference Result 4651 states and 15957 transitions. [2022-02-11 00:55:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:55:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:55:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:03,454 INFO L225 Difference]: With dead ends: 4651 [2022-02-11 00:55:03,455 INFO L226 Difference]: Without dead ends: 4645 [2022-02-11 00:55:03,455 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=2444, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:55:03,455 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 203 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 969 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:03,455 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 177 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1838 Invalid, 0 Unknown, 969 Unchecked, 0.7s Time] [2022-02-11 00:55:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4645 states. [2022-02-11 00:55:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4645 to 3043. [2022-02-11 00:55:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 3.304733727810651) internal successors, (10053), 3042 states have internal predecessors, (10053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 10053 transitions. [2022-02-11 00:55:03,510 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 10053 transitions. Word has length 24 [2022-02-11 00:55:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:03,510 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 10053 transitions. [2022-02-11 00:55:03,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 10053 transitions. [2022-02-11 00:55:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:03,514 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:03,514 INFO L515 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] [2022-02-11 00:55:03,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-02-11 00:55:03,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:03,715 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash 588337472, now seen corresponding path program 7 times [2022-02-11 00:55:03,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:03,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163195468] [2022-02-11 00:55:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:03,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:03,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:03,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163195468] [2022-02-11 00:55:03,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163195468] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:03,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052071289] [2022-02-11 00:55:03,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:55:03,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:03,907 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:03,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-11 00:55:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:03,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:04,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:04,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:04,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:04,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:04,193 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 37 treesize of output 21 [2022-02-11 00:55:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:04,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:04,461 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:04,462 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 20 treesize of output 43 [2022-02-11 00:55:04,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:04,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:04,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:04,512 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 20 treesize of output 3 [2022-02-11 00:55:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:04,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052071289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:04,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:04,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:55:04,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279489619] [2022-02-11 00:55:04,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:04,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:55:04,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:55:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:55:04,528 INFO L87 Difference]: Start difference. First operand 3043 states and 10053 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:06,582 INFO L93 Difference]: Finished difference Result 4373 states and 14911 transitions. [2022-02-11 00:55:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:55:06,582 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:55:06,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:06,591 INFO L225 Difference]: With dead ends: 4373 [2022-02-11 00:55:06,591 INFO L226 Difference]: Without dead ends: 4371 [2022-02-11 00:55:06,591 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=474, Invalid=3948, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:55:06,591 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 183 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 672 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:06,591 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 207 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1731 Invalid, 0 Unknown, 672 Unchecked, 0.7s Time] [2022-02-11 00:55:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-02-11 00:55:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3056. [2022-02-11 00:55:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 3.3037643207855973) internal successors, (10093), 3055 states have internal predecessors, (10093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 10093 transitions. [2022-02-11 00:55:06,644 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 10093 transitions. Word has length 24 [2022-02-11 00:55:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:06,644 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 10093 transitions. [2022-02-11 00:55:06,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 10093 transitions. [2022-02-11 00:55:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:06,649 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:06,649 INFO L515 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] [2022-02-11 00:55:06,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:06,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:06,850 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1982548168, now seen corresponding path program 29 times [2022-02-11 00:55:06,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:06,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320541393] [2022-02-11 00:55:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:06,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:07,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:07,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320541393] [2022-02-11 00:55:07,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320541393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:07,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669133090] [2022-02-11 00:55:07,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:55:07,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:07,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:07,038 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:07,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-02-11 00:55:07,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:55:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:07,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:07,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:07,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:07,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:07,312 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 33 treesize of output 17 [2022-02-11 00:55:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:07,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:07,576 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:07,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:55:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:07,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:07,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:07,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:07,627 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 20 treesize of output 3 [2022-02-11 00:55:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:07,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669133090] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:07,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:07,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:55:07,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869126250] [2022-02-11 00:55:07,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:07,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:55:07,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:55:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:55:07,644 INFO L87 Difference]: Start difference. First operand 3056 states and 10093 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:09,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:09,413 INFO L93 Difference]: Finished difference Result 4072 states and 13690 transitions. [2022-02-11 00:55:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:55:09,413 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:55:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:09,422 INFO L225 Difference]: With dead ends: 4072 [2022-02-11 00:55:09,422 INFO L226 Difference]: Without dead ends: 4066 [2022-02-11 00:55:09,422 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=378, Invalid=2928, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:55:09,423 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 157 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:09,423 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 167 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1686 Invalid, 0 Unknown, 527 Unchecked, 0.7s Time] [2022-02-11 00:55:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2022-02-11 00:55:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 3081. [2022-02-11 00:55:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.301948051948052) internal successors, (10170), 3080 states have internal predecessors, (10170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 10170 transitions. [2022-02-11 00:55:09,476 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 10170 transitions. Word has length 24 [2022-02-11 00:55:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:09,476 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 10170 transitions. [2022-02-11 00:55:09,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 10170 transitions. [2022-02-11 00:55:09,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:09,482 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:09,482 INFO L515 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] [2022-02-11 00:55:09,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:09,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:09,682 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2115905623, now seen corresponding path program 20 times [2022-02-11 00:55:09,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:09,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307619788] [2022-02-11 00:55:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:09,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:09,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307619788] [2022-02-11 00:55:09,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307619788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:09,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11709580] [2022-02-11 00:55:09,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:55:09,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:09,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:09,894 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:09,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-02-11 00:55:09,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:55:09,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:09,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:10,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:10,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:10,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-02-11 00:55:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:10,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:10,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:10,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:10,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:10,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:55:10,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 52 [2022-02-11 00:55:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:10,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11709580] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:10,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:10,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:55:10,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530572104] [2022-02-11 00:55:10,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:10,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:55:10,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:10,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:55:10,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:55:10,799 INFO L87 Difference]: Start difference. First operand 3081 states and 10170 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:55:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:13,714 INFO L93 Difference]: Finished difference Result 3823 states and 12504 transitions. [2022-02-11 00:55:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:55:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:55:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:13,720 INFO L225 Difference]: With dead ends: 3823 [2022-02-11 00:55:13,720 INFO L226 Difference]: Without dead ends: 3811 [2022-02-11 00:55:13,721 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=636, Invalid=5844, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 00:55:13,721 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 196 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:13,721 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 289 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1904 Invalid, 0 Unknown, 755 Unchecked, 0.8s Time] [2022-02-11 00:55:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2022-02-11 00:55:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3149. [2022-02-11 00:55:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 3.3049555273189326) internal successors, (10404), 3148 states have internal predecessors, (10404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 10404 transitions. [2022-02-11 00:55:13,761 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 10404 transitions. Word has length 24 [2022-02-11 00:55:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:13,761 INFO L470 AbstractCegarLoop]: Abstraction has 3149 states and 10404 transitions. [2022-02-11 00:55:13,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:55:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 10404 transitions. [2022-02-11 00:55:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:13,765 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:13,765 INFO L515 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] [2022-02-11 00:55:13,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-02-11 00:55:13,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-02-11 00:55:13,966 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:13,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:13,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2007880862, now seen corresponding path program 30 times [2022-02-11 00:55:13,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:13,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251941328] [2022-02-11 00:55:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:13,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:14,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:14,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251941328] [2022-02-11 00:55:14,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251941328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:14,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928733189] [2022-02-11 00:55:14,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:55:14,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:14,156 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:14,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-02-11 00:55:14,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:55:14,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:14,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:14,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:14,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:14,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:14,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:55:14,462 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 39 treesize of output 51 [2022-02-11 00:55:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:14,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:15,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:15,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:15,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:15,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:15,127 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 45 treesize of output 7 [2022-02-11 00:55:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:15,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928733189] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:15,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:15,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-02-11 00:55:15,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215018643] [2022-02-11 00:55:15,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:15,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:55:15,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:55:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:55:15,157 INFO L87 Difference]: Start difference. First operand 3149 states and 10404 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:16,947 INFO L93 Difference]: Finished difference Result 3789 states and 12551 transitions. [2022-02-11 00:55:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:55:16,947 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:55:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:16,955 INFO L225 Difference]: With dead ends: 3789 [2022-02-11 00:55:16,955 INFO L226 Difference]: Without dead ends: 3778 [2022-02-11 00:55:16,956 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=369, Invalid=3537, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:55:16,956 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 158 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:16,956 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 127 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1323 Invalid, 0 Unknown, 1126 Unchecked, 0.5s Time] [2022-02-11 00:55:16,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2022-02-11 00:55:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3166. [2022-02-11 00:55:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3166 states, 3165 states have (on average 3.3048973143759874) internal successors, (10460), 3165 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3166 states to 3166 states and 10460 transitions. [2022-02-11 00:55:17,015 INFO L78 Accepts]: Start accepts. Automaton has 3166 states and 10460 transitions. Word has length 24 [2022-02-11 00:55:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:17,015 INFO L470 AbstractCegarLoop]: Abstraction has 3166 states and 10460 transitions. [2022-02-11 00:55:17,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3166 states and 10460 transitions. [2022-02-11 00:55:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:17,021 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:17,021 INFO L515 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] [2022-02-11 00:55:17,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:17,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:17,221 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:17,222 INFO L85 PathProgramCache]: Analyzing trace with hash 200426399, now seen corresponding path program 21 times [2022-02-11 00:55:17,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:17,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935677219] [2022-02-11 00:55:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:17,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:17,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:17,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935677219] [2022-02-11 00:55:17,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935677219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:17,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634010429] [2022-02-11 00:55:17,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:55:17,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:17,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:17,412 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:17,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-02-11 00:55:17,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:55:17,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:17,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:55:17,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:17,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:17,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:17,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:17,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:17,783 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 29 treesize of output 17 [2022-02-11 00:55:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:17,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:18,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:18,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:55:18,179 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 37 treesize of output 54 [2022-02-11 00:55:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:18,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634010429] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:18,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:18,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-02-11 00:55:18,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47406828] [2022-02-11 00:55:18,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:18,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:55:18,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:55:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:55:18,274 INFO L87 Difference]: Start difference. First operand 3166 states and 10460 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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) [2022-02-11 00:55:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:19,648 INFO L93 Difference]: Finished difference Result 4005 states and 13426 transitions. [2022-02-11 00:55:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:55:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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 [2022-02-11 00:55:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:19,656 INFO L225 Difference]: With dead ends: 4005 [2022-02-11 00:55:19,656 INFO L226 Difference]: Without dead ends: 3999 [2022-02-11 00:55:19,657 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:55:19,657 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:19,657 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 158 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1399 Invalid, 0 Unknown, 1166 Unchecked, 0.5s Time] [2022-02-11 00:55:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2022-02-11 00:55:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3180. [2022-02-11 00:55:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 3179 states have (on average 3.304812834224599) internal successors, (10506), 3179 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 10506 transitions. [2022-02-11 00:55:19,710 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 10506 transitions. Word has length 24 [2022-02-11 00:55:19,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:19,711 INFO L470 AbstractCegarLoop]: Abstraction has 3180 states and 10506 transitions. [2022-02-11 00:55:19,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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) [2022-02-11 00:55:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 10506 transitions. [2022-02-11 00:55:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:19,716 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:19,716 INFO L515 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] [2022-02-11 00:55:19,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-02-11 00:55:19,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-02-11 00:55:19,916 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash -510320264, now seen corresponding path program 31 times [2022-02-11 00:55:19,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:19,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765947127] [2022-02-11 00:55:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:19,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:20,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:20,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765947127] [2022-02-11 00:55:20,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765947127] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:20,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11555218] [2022-02-11 00:55:20,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:55:20,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:20,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:20,108 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:20,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-02-11 00:55:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:20,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:20,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:20,365 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 33 treesize of output 17 [2022-02-11 00:55:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:20,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:20,660 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:20,661 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 20 treesize of output 43 [2022-02-11 00:55:20,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:20,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:20,709 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 20 treesize of output 3 [2022-02-11 00:55:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:20,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11555218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:20,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:20,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:55:20,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962008038] [2022-02-11 00:55:20,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:20,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:55:20,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:20,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:55:20,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:55:20,730 INFO L87 Difference]: Start difference. First operand 3180 states and 10506 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2022-02-11 00:55:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:22,373 INFO L93 Difference]: Finished difference Result 3860 states and 12801 transitions. [2022-02-11 00:55:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:55:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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 [2022-02-11 00:55:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:22,381 INFO L225 Difference]: With dead ends: 3860 [2022-02-11 00:55:22,381 INFO L226 Difference]: Without dead ends: 3848 [2022-02-11 00:55:22,381 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=272, Invalid=2590, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:55:22,381 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 148 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:22,381 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 86 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1945 Invalid, 0 Unknown, 432 Unchecked, 0.8s Time] [2022-02-11 00:55:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2022-02-11 00:55:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3222. [2022-02-11 00:55:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3221 states have (on average 3.3042533374728347) internal successors, (10643), 3221 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 10643 transitions. [2022-02-11 00:55:22,430 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 10643 transitions. Word has length 24 [2022-02-11 00:55:22,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:22,430 INFO L470 AbstractCegarLoop]: Abstraction has 3222 states and 10643 transitions. [2022-02-11 00:55:22,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2022-02-11 00:55:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 10643 transitions. [2022-02-11 00:55:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:22,436 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:22,436 INFO L515 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] [2022-02-11 00:55:22,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-02-11 00:55:22,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-02-11 00:55:22,636 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1232490071, now seen corresponding path program 22 times [2022-02-11 00:55:22,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:22,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901830084] [2022-02-11 00:55:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:22,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:22,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:22,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901830084] [2022-02-11 00:55:22,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901830084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:22,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667239454] [2022-02-11 00:55:22,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:55:22,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:22,831 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:22,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-02-11 00:55:22,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:55:22,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:22,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:23,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:23,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:23,080 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 37 treesize of output 21 [2022-02-11 00:55:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:23,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:23,383 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:23,383 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 20 treesize of output 43 [2022-02-11 00:55:23,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:23,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:23,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:23,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:23,441 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 20 treesize of output 3 [2022-02-11 00:55:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:23,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667239454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:23,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:23,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:55:23,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818125816] [2022-02-11 00:55:23,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:23,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:55:23,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:23,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:55:23,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:55:23,458 INFO L87 Difference]: Start difference. First operand 3222 states and 10643 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2022-02-11 00:55:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:24,970 INFO L93 Difference]: Finished difference Result 3784 states and 12489 transitions. [2022-02-11 00:55:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:55:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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 [2022-02-11 00:55:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:24,978 INFO L225 Difference]: With dead ends: 3784 [2022-02-11 00:55:24,978 INFO L226 Difference]: Without dead ends: 3769 [2022-02-11 00:55:24,978 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:55:24,978 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 123 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:24,978 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 91 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1895 Invalid, 0 Unknown, 658 Unchecked, 0.7s Time] [2022-02-11 00:55:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2022-02-11 00:55:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3224. [2022-02-11 00:55:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 3.3012721067328576) internal successors, (10640), 3223 states have internal predecessors, (10640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:25,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 10640 transitions. [2022-02-11 00:55:25,033 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 10640 transitions. Word has length 24 [2022-02-11 00:55:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:25,033 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 10640 transitions. [2022-02-11 00:55:25,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2022-02-11 00:55:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 10640 transitions. [2022-02-11 00:55:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:25,039 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:25,039 INFO L515 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] [2022-02-11 00:55:25,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-02-11 00:55:25,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-02-11 00:55:25,239 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2063031644, now seen corresponding path program 32 times [2022-02-11 00:55:25,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:25,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732811733] [2022-02-11 00:55:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:25,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:25,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:25,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732811733] [2022-02-11 00:55:25,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732811733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:25,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130740342] [2022-02-11 00:55:25,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:55:25,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:25,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:25,439 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:25,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-02-11 00:55:25,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:55:25,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:25,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:55:25,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:25,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:25,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:25,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:25,976 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 29 treesize of output 17 [2022-02-11 00:55:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:26,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:26,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:26,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:55:26,388 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 37 treesize of output 56 [2022-02-11 00:55:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:26,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130740342] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:26,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:26,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-02-11 00:55:26,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504100538] [2022-02-11 00:55:26,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:26,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:55:26,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:55:26,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:55:26,472 INFO L87 Difference]: Start difference. First operand 3224 states and 10640 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:55:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:28,767 INFO L93 Difference]: Finished difference Result 4392 states and 14519 transitions. [2022-02-11 00:55:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:55:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:55:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:28,777 INFO L225 Difference]: With dead ends: 4392 [2022-02-11 00:55:28,777 INFO L226 Difference]: Without dead ends: 4375 [2022-02-11 00:55:28,777 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:55:28,777 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 188 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 2874 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 4123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1197 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:28,777 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 373 Invalid, 4123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2874 Invalid, 0 Unknown, 1197 Unchecked, 1.1s Time] [2022-02-11 00:55:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2022-02-11 00:55:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 3233. [2022-02-11 00:55:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3233 states, 3232 states have (on average 3.2991955445544554) internal successors, (10663), 3232 states have internal predecessors, (10663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 10663 transitions. [2022-02-11 00:55:28,839 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 10663 transitions. Word has length 24 [2022-02-11 00:55:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:28,839 INFO L470 AbstractCegarLoop]: Abstraction has 3233 states and 10663 transitions. [2022-02-11 00:55:28,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:55:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 10663 transitions. [2022-02-11 00:55:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:28,845 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:28,845 INFO L515 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] [2022-02-11 00:55:28,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-02-11 00:55:29,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-02-11 00:55:29,045 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:29,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:29,046 INFO L85 PathProgramCache]: Analyzing trace with hash -48129382, now seen corresponding path program 8 times [2022-02-11 00:55:29,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:29,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18658279] [2022-02-11 00:55:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:29,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:29,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:29,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18658279] [2022-02-11 00:55:29,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18658279] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:29,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857394750] [2022-02-11 00:55:29,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:55:29,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:29,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:29,255 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:29,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-02-11 00:55:29,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:55:29,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:29,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:29,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:29,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:29,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:55:29,603 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 35 treesize of output 47 [2022-02-11 00:55:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:29,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:30,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:30,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:30,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:30,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:30,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-02-11 00:55:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:30,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857394750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:30,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:30,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:55:30,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221366355] [2022-02-11 00:55:30,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:30,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:55:30,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:55:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:55:30,269 INFO L87 Difference]: Start difference. First operand 3233 states and 10663 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:55:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:33,704 INFO L93 Difference]: Finished difference Result 5020 states and 17012 transitions. [2022-02-11 00:55:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 00:55:33,704 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:55:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:33,714 INFO L225 Difference]: With dead ends: 5020 [2022-02-11 00:55:33,714 INFO L226 Difference]: Without dead ends: 5014 [2022-02-11 00:55:33,715 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=751, Invalid=7621, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 00:55:33,715 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 234 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1352 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:33,715 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 223 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1733 Invalid, 0 Unknown, 1352 Unchecked, 0.8s Time] [2022-02-11 00:55:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2022-02-11 00:55:33,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 3227. [2022-02-11 00:55:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3226 states have (on average 3.300061996280223) internal successors, (10646), 3226 states have internal predecessors, (10646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 10646 transitions. [2022-02-11 00:55:33,777 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 10646 transitions. Word has length 24 [2022-02-11 00:55:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:33,777 INFO L470 AbstractCegarLoop]: Abstraction has 3227 states and 10646 transitions. [2022-02-11 00:55:33,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:55:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 10646 transitions. [2022-02-11 00:55:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:33,782 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:33,783 INFO L515 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] [2022-02-11 00:55:33,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-02-11 00:55:33,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:33,983 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:33,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1675952274, now seen corresponding path program 33 times [2022-02-11 00:55:33,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:33,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456270597] [2022-02-11 00:55:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:33,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:34,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:34,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456270597] [2022-02-11 00:55:34,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456270597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:34,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513581154] [2022-02-11 00:55:34,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:55:34,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:34,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:34,182 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:34,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-02-11 00:55:34,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:55:34,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:34,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:55:34,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:34,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:34,635 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 29 treesize of output 17 [2022-02-11 00:55:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:34,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:34,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:34,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:55:34,995 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 37 treesize of output 54 [2022-02-11 00:55:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:35,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513581154] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:35,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:35,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:55:35,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195778477] [2022-02-11 00:55:35,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:35,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:55:35,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:35,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:55:35,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:55:35,115 INFO L87 Difference]: Start difference. First operand 3227 states and 10646 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:55:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:36,973 INFO L93 Difference]: Finished difference Result 4788 states and 16182 transitions. [2022-02-11 00:55:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:55:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 [2022-02-11 00:55:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:36,983 INFO L225 Difference]: With dead ends: 4788 [2022-02-11 00:55:36,983 INFO L226 Difference]: Without dead ends: 4782 [2022-02-11 00:55:36,984 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=356, Invalid=2950, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:55:36,984 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 872 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:36,984 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 174 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1826 Invalid, 0 Unknown, 872 Unchecked, 0.8s Time] [2022-02-11 00:55:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2022-02-11 00:55:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 3204. [2022-02-11 00:55:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 3203 states have (on average 3.3037777083983766) internal successors, (10582), 3203 states have internal predecessors, (10582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 10582 transitions. [2022-02-11 00:55:37,046 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 10582 transitions. Word has length 24 [2022-02-11 00:55:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:37,046 INFO L470 AbstractCegarLoop]: Abstraction has 3204 states and 10582 transitions. [2022-02-11 00:55:37,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:55:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 10582 transitions. [2022-02-11 00:55:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:37,051 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:37,051 INFO L515 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] [2022-02-11 00:55:37,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-02-11 00:55:37,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-02-11 00:55:37,251 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:37,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1371414008, now seen corresponding path program 34 times [2022-02-11 00:55:37,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:37,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582285212] [2022-02-11 00:55:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:37,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:37,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:37,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582285212] [2022-02-11 00:55:37,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582285212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:37,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380464575] [2022-02-11 00:55:37,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:55:37,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:37,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:37,462 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:37,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-02-11 00:55:37,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:55:37,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:37,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:37,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:37,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:37,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:37,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:37,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:37,720 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 37 treesize of output 21 [2022-02-11 00:55:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:37,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:38,017 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:38,018 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 20 treesize of output 43 [2022-02-11 00:55:38,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:38,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:38,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:38,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:38,080 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 20 treesize of output 3 [2022-02-11 00:55:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:38,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380464575] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:38,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:38,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:55:38,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557230426] [2022-02-11 00:55:38,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:38,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:55:38,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:55:38,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:55:38,096 INFO L87 Difference]: Start difference. First operand 3204 states and 10582 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2022-02-11 00:55:39,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:39,683 INFO L93 Difference]: Finished difference Result 3997 states and 13358 transitions. [2022-02-11 00:55:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:55:39,684 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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 [2022-02-11 00:55:39,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:39,692 INFO L225 Difference]: With dead ends: 3997 [2022-02-11 00:55:39,692 INFO L226 Difference]: Without dead ends: 3991 [2022-02-11 00:55:39,692 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=257, Invalid=2395, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:55:39,692 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 148 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1073 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:39,692 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 149 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2023 Invalid, 0 Unknown, 1073 Unchecked, 0.8s Time] [2022-02-11 00:55:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3991 states. [2022-02-11 00:55:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3991 to 3199. [2022-02-11 00:55:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 3198 states have (on average 3.3045653533458412) internal successors, (10568), 3198 states have internal predecessors, (10568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 10568 transitions. [2022-02-11 00:55:39,747 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 10568 transitions. Word has length 24 [2022-02-11 00:55:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:39,747 INFO L470 AbstractCegarLoop]: Abstraction has 3199 states and 10568 transitions. [2022-02-11 00:55:39,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2022-02-11 00:55:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 10568 transitions. [2022-02-11 00:55:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:39,762 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:39,762 INFO L515 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] [2022-02-11 00:55:39,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-02-11 00:55:39,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:39,962 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:39,962 INFO L85 PathProgramCache]: Analyzing trace with hash -436040455, now seen corresponding path program 23 times [2022-02-11 00:55:39,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:39,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494155446] [2022-02-11 00:55:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:39,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:40,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:40,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494155446] [2022-02-11 00:55:40,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494155446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:40,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864788801] [2022-02-11 00:55:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:55:40,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:40,160 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:40,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-02-11 00:55:40,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:55:40,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:40,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:40,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:40,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:40,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:40,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:40,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:40,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-11 00:55:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:40,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:40,713 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:40,714 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 20 treesize of output 43 [2022-02-11 00:55:40,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:40,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:40,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:40,763 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 20 treesize of output 3 [2022-02-11 00:55:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:40,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864788801] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:40,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:40,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:55:40,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631691332] [2022-02-11 00:55:40,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:40,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:55:40,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:55:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:55:40,779 INFO L87 Difference]: Start difference. First operand 3199 states and 10568 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2022-02-11 00:55:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:42,439 INFO L93 Difference]: Finished difference Result 3842 states and 12687 transitions. [2022-02-11 00:55:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:55:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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 [2022-02-11 00:55:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:42,447 INFO L225 Difference]: With dead ends: 3842 [2022-02-11 00:55:42,447 INFO L226 Difference]: Without dead ends: 3836 [2022-02-11 00:55:42,447 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=3119, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:55:42,447 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 140 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 812 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:42,447 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 120 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1754 Invalid, 0 Unknown, 812 Unchecked, 0.7s Time] [2022-02-11 00:55:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2022-02-11 00:55:42,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3188. [2022-02-11 00:55:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 3.3049890178851586) internal successors, (10533), 3187 states have internal predecessors, (10533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 10533 transitions. [2022-02-11 00:55:42,496 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 10533 transitions. Word has length 24 [2022-02-11 00:55:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:42,496 INFO L470 AbstractCegarLoop]: Abstraction has 3188 states and 10533 transitions. [2022-02-11 00:55:42,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2022-02-11 00:55:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 10533 transitions. [2022-02-11 00:55:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:42,500 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:42,501 INFO L515 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] [2022-02-11 00:55:42,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-02-11 00:55:42,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:42,703 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:42,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:42,704 INFO L85 PathProgramCache]: Analyzing trace with hash -357538784, now seen corresponding path program 35 times [2022-02-11 00:55:42,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:42,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148419354] [2022-02-11 00:55:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:42,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:42,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:42,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148419354] [2022-02-11 00:55:42,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148419354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:42,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478903755] [2022-02-11 00:55:42,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:55:42,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:42,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:42,909 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:42,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-02-11 00:55:42,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:55:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:43,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:43,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:43,195 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 37 treesize of output 21 [2022-02-11 00:55:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:43,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:43,473 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:43,474 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 20 treesize of output 43 [2022-02-11 00:55:43,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:43,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:43,518 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 20 treesize of output 3 [2022-02-11 00:55:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:43,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478903755] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:43,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:43,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:55:43,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753336203] [2022-02-11 00:55:43,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:43,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:55:43,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:55:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:55:43,534 INFO L87 Difference]: Start difference. First operand 3188 states and 10533 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:44,827 INFO L93 Difference]: Finished difference Result 4227 states and 14132 transitions. [2022-02-11 00:55:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:55:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:55:44,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:44,836 INFO L225 Difference]: With dead ends: 4227 [2022-02-11 00:55:44,836 INFO L226 Difference]: Without dead ends: 4222 [2022-02-11 00:55:44,836 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2150, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:55:44,837 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 164 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:44,837 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 153 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1349 Invalid, 0 Unknown, 468 Unchecked, 0.5s Time] [2022-02-11 00:55:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2022-02-11 00:55:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3173. [2022-02-11 00:55:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 3.3051702395964693) internal successors, (10484), 3172 states have internal predecessors, (10484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 10484 transitions. [2022-02-11 00:55:44,892 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 10484 transitions. Word has length 24 [2022-02-11 00:55:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:44,892 INFO L470 AbstractCegarLoop]: Abstraction has 3173 states and 10484 transitions. [2022-02-11 00:55:44,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 10484 transitions. [2022-02-11 00:55:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:44,897 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:44,897 INFO L515 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] [2022-02-11 00:55:44,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-02-11 00:55:45,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:45,097 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:45,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash -634533128, now seen corresponding path program 36 times [2022-02-11 00:55:45,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:45,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726601179] [2022-02-11 00:55:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:45,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:45,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:45,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726601179] [2022-02-11 00:55:45,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726601179] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:45,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545762291] [2022-02-11 00:55:45,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:55:45,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:45,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:45,309 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:45,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-02-11 00:55:45,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:55:45,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:45,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:45,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:45,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:45,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:45,610 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 37 treesize of output 21 [2022-02-11 00:55:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:45,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:45,900 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:45,901 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 20 treesize of output 43 [2022-02-11 00:55:45,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:45,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:45,952 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 20 treesize of output 3 [2022-02-11 00:55:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:45,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545762291] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:45,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:45,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:55:45,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131055761] [2022-02-11 00:55:45,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:45,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:55:45,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:55:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:55:45,968 INFO L87 Difference]: Start difference. First operand 3173 states and 10484 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:55:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:46,732 INFO L93 Difference]: Finished difference Result 3472 states and 11405 transitions. [2022-02-11 00:55:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:55:46,732 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:55:46,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:46,739 INFO L225 Difference]: With dead ends: 3472 [2022-02-11 00:55:46,739 INFO L226 Difference]: Without dead ends: 3466 [2022-02-11 00:55:46,739 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:55:46,740 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:46,740 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 173 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1018 Invalid, 0 Unknown, 347 Unchecked, 0.4s Time] [2022-02-11 00:55:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2022-02-11 00:55:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 3178. [2022-02-11 00:55:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3177 states have (on average 3.304060434372049) internal successors, (10497), 3177 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 10497 transitions. [2022-02-11 00:55:46,796 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 10497 transitions. Word has length 24 [2022-02-11 00:55:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:46,797 INFO L470 AbstractCegarLoop]: Abstraction has 3178 states and 10497 transitions. [2022-02-11 00:55:46,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:55:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 10497 transitions. [2022-02-11 00:55:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:46,802 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:46,802 INFO L515 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] [2022-02-11 00:55:46,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-02-11 00:55:47,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:47,002 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:47,003 INFO L85 PathProgramCache]: Analyzing trace with hash 740677364, now seen corresponding path program 37 times [2022-02-11 00:55:47,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:47,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854558537] [2022-02-11 00:55:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:47,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:47,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:47,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854558537] [2022-02-11 00:55:47,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854558537] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:47,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209868378] [2022-02-11 00:55:47,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:55:47,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:47,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:47,205 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:47,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-02-11 00:55:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:47,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:47,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:47,505 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 33 treesize of output 17 [2022-02-11 00:55:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:47,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:47,793 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:47,793 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 20 treesize of output 43 [2022-02-11 00:55:47,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:47,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:47,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:47,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:47,844 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 20 treesize of output 3 [2022-02-11 00:55:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:47,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209868378] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:47,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:47,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:55:47,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567982843] [2022-02-11 00:55:47,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:47,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:55:47,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:47,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:55:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:55:47,860 INFO L87 Difference]: Start difference. First operand 3178 states and 10497 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:55:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:49,161 INFO L93 Difference]: Finished difference Result 3569 states and 11687 transitions. [2022-02-11 00:55:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:55:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:55:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:49,168 INFO L225 Difference]: With dead ends: 3569 [2022-02-11 00:55:49,168 INFO L226 Difference]: Without dead ends: 3563 [2022-02-11 00:55:49,168 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:55:49,168 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:49,169 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 150 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1617 Invalid, 0 Unknown, 459 Unchecked, 0.6s Time] [2022-02-11 00:55:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2022-02-11 00:55:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3184. [2022-02-11 00:55:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 3.3034872761545713) internal successors, (10515), 3183 states have internal predecessors, (10515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 10515 transitions. [2022-02-11 00:55:49,217 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 10515 transitions. Word has length 24 [2022-02-11 00:55:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:49,217 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 10515 transitions. [2022-02-11 00:55:49,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:55:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 10515 transitions. [2022-02-11 00:55:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:49,222 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:49,222 INFO L515 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] [2022-02-11 00:55:49,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:49,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:49,423 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash 599037235, now seen corresponding path program 7 times [2022-02-11 00:55:49,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:49,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541343562] [2022-02-11 00:55:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:49,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:49,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:49,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541343562] [2022-02-11 00:55:49,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541343562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:49,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332048993] [2022-02-11 00:55:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:55:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:49,624 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:49,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-02-11 00:55:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:49,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:49,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:49,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:49,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:49,923 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 33 treesize of output 17 [2022-02-11 00:55:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:49,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:50,217 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:50,217 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 20 treesize of output 43 [2022-02-11 00:55:50,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:50,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:50,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:50,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:50,257 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 20 treesize of output 3 [2022-02-11 00:55:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:50,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332048993] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:50,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:50,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:55:50,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683637535] [2022-02-11 00:55:50,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:50,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:55:50,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:55:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:55:50,272 INFO L87 Difference]: Start difference. First operand 3184 states and 10515 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:55:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:51,490 INFO L93 Difference]: Finished difference Result 3576 states and 11731 transitions. [2022-02-11 00:55:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:55:51,490 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:55:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:51,498 INFO L225 Difference]: With dead ends: 3576 [2022-02-11 00:55:51,498 INFO L226 Difference]: Without dead ends: 3574 [2022-02-11 00:55:51,498 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:55:51,498 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 140 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 568 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:51,498 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 148 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1521 Invalid, 0 Unknown, 568 Unchecked, 0.6s Time] [2022-02-11 00:55:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2022-02-11 00:55:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 3184. [2022-02-11 00:55:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 3.3034872761545713) internal successors, (10515), 3183 states have internal predecessors, (10515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 10515 transitions. [2022-02-11 00:55:51,546 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 10515 transitions. Word has length 24 [2022-02-11 00:55:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:51,546 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 10515 transitions. [2022-02-11 00:55:51,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:55:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 10515 transitions. [2022-02-11 00:55:51,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:51,552 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:51,552 INFO L515 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] [2022-02-11 00:55:51,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-02-11 00:55:51,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-02-11 00:55:51,752 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1101331882, now seen corresponding path program 38 times [2022-02-11 00:55:51,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:51,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774661005] [2022-02-11 00:55:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:51,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:51,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:51,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774661005] [2022-02-11 00:55:51,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774661005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:51,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402903948] [2022-02-11 00:55:51,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:55:51,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:51,964 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:51,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-02-11 00:55:51,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:55:51,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 00:55:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:52,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:52,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:52,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:55:52,248 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 24 treesize of output 50 [2022-02-11 00:55:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:52,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:53,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-02-11 00:55:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:53,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402903948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:53,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:53,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-11 00:55:53,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328195239] [2022-02-11 00:55:53,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:53,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:55:53,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:55:53,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:55:53,302 INFO L87 Difference]: Start difference. First operand 3184 states and 10515 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:54,285 INFO L93 Difference]: Finished difference Result 3847 states and 12725 transitions. [2022-02-11 00:55:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:55:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:55:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:54,293 INFO L225 Difference]: With dead ends: 3847 [2022-02-11 00:55:54,293 INFO L226 Difference]: Without dead ends: 3835 [2022-02-11 00:55:54,294 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=329, Invalid=2221, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:55:54,294 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 279 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 886 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:54,294 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 137 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 648 Invalid, 0 Unknown, 886 Unchecked, 0.3s Time] [2022-02-11 00:55:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2022-02-11 00:55:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3176. [2022-02-11 00:55:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3176 states, 3175 states have (on average 3.305196850393701) internal successors, (10494), 3175 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 10494 transitions. [2022-02-11 00:55:54,344 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 10494 transitions. Word has length 24 [2022-02-11 00:55:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:54,344 INFO L470 AbstractCegarLoop]: Abstraction has 3176 states and 10494 transitions. [2022-02-11 00:55:54,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 10494 transitions. [2022-02-11 00:55:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:54,349 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:54,349 INFO L515 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] [2022-02-11 00:55:54,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-02-11 00:55:54,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-02-11 00:55:54,549 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:54,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1176790384, now seen corresponding path program 39 times [2022-02-11 00:55:54,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:54,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665268123] [2022-02-11 00:55:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:54,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:54,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:54,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665268123] [2022-02-11 00:55:54,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665268123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:54,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740591752] [2022-02-11 00:55:54,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:55:54,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:54,776 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:54,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-02-11 00:55:54,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:55:54,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:55:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:55,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:55,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:55,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:55,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:55,260 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 33 treesize of output 21 [2022-02-11 00:55:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:55,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:55,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:55:55,609 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 37 treesize of output 54 [2022-02-11 00:55:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:55,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740591752] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:55,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:55,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:55:55,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371050836] [2022-02-11 00:55:55,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:55,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:55:55,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:55,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:55:55,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:55:55,750 INFO L87 Difference]: Start difference. First operand 3176 states and 10494 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:55:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:56,805 INFO L93 Difference]: Finished difference Result 3548 states and 11747 transitions. [2022-02-11 00:55:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:55:56,805 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 [2022-02-11 00:55:56,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:56,811 INFO L225 Difference]: With dead ends: 3548 [2022-02-11 00:55:56,811 INFO L226 Difference]: Without dead ends: 3542 [2022-02-11 00:55:56,812 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:55:56,812 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 113 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:56,812 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 158 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1356 Invalid, 0 Unknown, 1112 Unchecked, 0.5s Time] [2022-02-11 00:55:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2022-02-11 00:55:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3177. [2022-02-11 00:55:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 3.304785894206549) internal successors, (10496), 3176 states have internal predecessors, (10496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 10496 transitions. [2022-02-11 00:55:56,855 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 10496 transitions. Word has length 24 [2022-02-11 00:55:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:56,855 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 10496 transitions. [2022-02-11 00:55:56,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-02-11 00:55:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 10496 transitions. [2022-02-11 00:55:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:56,860 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:56,860 INFO L515 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] [2022-02-11 00:55:56,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-02-11 00:55:57,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-02-11 00:55:57,061 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:57,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1048556492, now seen corresponding path program 40 times [2022-02-11 00:55:57,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:57,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823172250] [2022-02-11 00:55:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:57,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:57,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:57,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823172250] [2022-02-11 00:55:57,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823172250] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:57,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268388450] [2022-02-11 00:55:57,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:55:57,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:57,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:57,298 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:57,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-02-11 00:55:57,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:55:57,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:57,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:55:57,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:57,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:57,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:57,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:57,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:57,595 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 33 treesize of output 17 [2022-02-11 00:55:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:57,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:57,853 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:55:57,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:55:57,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:57,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:55:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:57,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:55:57,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:55:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:57,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268388450] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:57,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:57,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:55:57,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632109273] [2022-02-11 00:55:57,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:57,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:55:57,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:57,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:55:57,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:55:57,919 INFO L87 Difference]: Start difference. First operand 3177 states and 10496 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:59,211 INFO L93 Difference]: Finished difference Result 3607 states and 11940 transitions. [2022-02-11 00:55:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:55:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:55:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:59,219 INFO L225 Difference]: With dead ends: 3607 [2022-02-11 00:55:59,219 INFO L226 Difference]: Without dead ends: 3601 [2022-02-11 00:55:59,219 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=2071, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:55:59,219 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:59,219 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 152 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1571 Invalid, 0 Unknown, 374 Unchecked, 0.6s Time] [2022-02-11 00:55:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2022-02-11 00:55:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 3181. [2022-02-11 00:55:59,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 3180 states have (on average 3.3037735849056604) internal successors, (10506), 3180 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 10506 transitions. [2022-02-11 00:55:59,270 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 10506 transitions. Word has length 24 [2022-02-11 00:55:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:59,270 INFO L470 AbstractCegarLoop]: Abstraction has 3181 states and 10506 transitions. [2022-02-11 00:55:59,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:59,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 10506 transitions. [2022-02-11 00:55:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:55:59,275 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:59,275 INFO L515 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] [2022-02-11 00:55:59,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:59,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:59,475 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:55:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1359815116, now seen corresponding path program 41 times [2022-02-11 00:55:59,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:59,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118192600] [2022-02-11 00:55:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:59,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:59,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:59,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118192600] [2022-02-11 00:55:59,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118192600] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:59,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848945049] [2022-02-11 00:55:59,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:55:59,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:59,771 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:55:59,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-02-11 00:55:59,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:55:59,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:59,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:55:59,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:00,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:00,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:00,051 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-02-11 00:56:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:00,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:00,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:00,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:00,632 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 37 treesize of output 54 [2022-02-11 00:56:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:00,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848945049] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:00,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:00,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:56:00,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601511607] [2022-02-11 00:56:00,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:00,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:56:00,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:56:00,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:56:00,745 INFO L87 Difference]: Start difference. First operand 3181 states and 10506 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:01,617 INFO L93 Difference]: Finished difference Result 3422 states and 11316 transitions. [2022-02-11 00:56:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:56:01,617 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:01,624 INFO L225 Difference]: With dead ends: 3422 [2022-02-11 00:56:01,624 INFO L226 Difference]: Without dead ends: 3416 [2022-02-11 00:56:01,624 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:56:01,625 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 652 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:01,625 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 125 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1169 Invalid, 0 Unknown, 652 Unchecked, 0.5s Time] [2022-02-11 00:56:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-02-11 00:56:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 3186. [2022-02-11 00:56:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.302354788069074) internal successors, (10518), 3185 states have internal predecessors, (10518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10518 transitions. [2022-02-11 00:56:01,679 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10518 transitions. Word has length 24 [2022-02-11 00:56:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:01,679 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 10518 transitions. [2022-02-11 00:56:01,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10518 transitions. [2022-02-11 00:56:01,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:01,684 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:01,684 INFO L515 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] [2022-02-11 00:56:01,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-02-11 00:56:01,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-02-11 00:56:01,885 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:01,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1866863504, now seen corresponding path program 42 times [2022-02-11 00:56:01,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:01,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859755039] [2022-02-11 00:56:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:01,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:02,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:02,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859755039] [2022-02-11 00:56:02,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859755039] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:02,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886761082] [2022-02-11 00:56:02,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:56:02,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:02,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:02,119 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:02,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-02-11 00:56:02,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:56:02,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:02,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:56:02,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:02,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:02,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:02,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:02,490 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 28 treesize of output 42 [2022-02-11 00:56:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:02,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:03,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:03,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:03,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:03,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:03,515 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 41 treesize of output 7 [2022-02-11 00:56:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:03,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886761082] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:03,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:03,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:56:03,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108674999] [2022-02-11 00:56:03,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:03,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:56:03,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:03,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:56:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:56:03,546 INFO L87 Difference]: Start difference. First operand 3186 states and 10518 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:04,873 INFO L93 Difference]: Finished difference Result 3647 states and 12033 transitions. [2022-02-11 00:56:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:56:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:04,880 INFO L225 Difference]: With dead ends: 3647 [2022-02-11 00:56:04,881 INFO L226 Difference]: Without dead ends: 3641 [2022-02-11 00:56:04,881 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:56:04,881 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 476 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:04,881 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 144 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1260 Invalid, 0 Unknown, 476 Unchecked, 0.5s Time] [2022-02-11 00:56:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2022-02-11 00:56:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 3188. [2022-02-11 00:56:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 3.3018512707875747) internal successors, (10523), 3187 states have internal predecessors, (10523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 10523 transitions. [2022-02-11 00:56:04,935 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 10523 transitions. Word has length 24 [2022-02-11 00:56:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:04,935 INFO L470 AbstractCegarLoop]: Abstraction has 3188 states and 10523 transitions. [2022-02-11 00:56:04,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 10523 transitions. [2022-02-11 00:56:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:04,940 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:04,940 INFO L515 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] [2022-02-11 00:56:04,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-02-11 00:56:05,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-02-11 00:56:05,140 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1133296982, now seen corresponding path program 43 times [2022-02-11 00:56:05,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:05,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693016102] [2022-02-11 00:56:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:05,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:05,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693016102] [2022-02-11 00:56:05,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693016102] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:05,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183344318] [2022-02-11 00:56:05,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:56:05,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:05,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:05,372 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:05,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-02-11 00:56:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:05,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:05,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:05,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:05,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:05,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:05,591 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 30 treesize of output 16 [2022-02-11 00:56:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:05,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:05,884 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:56:05,884 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 20 treesize of output 43 [2022-02-11 00:56:05,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:05,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:05,931 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 20 treesize of output 3 [2022-02-11 00:56:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:05,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183344318] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:05,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:05,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-02-11 00:56:05,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527555321] [2022-02-11 00:56:05,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:05,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:56:05,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:56:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:56:05,947 INFO L87 Difference]: Start difference. First operand 3188 states and 10523 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-02-11 00:56:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:06,640 INFO L93 Difference]: Finished difference Result 3418 states and 11337 transitions. [2022-02-11 00:56:06,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:56:06,640 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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 [2022-02-11 00:56:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:06,646 INFO L225 Difference]: With dead ends: 3418 [2022-02-11 00:56:06,646 INFO L226 Difference]: Without dead ends: 3411 [2022-02-11 00:56:06,646 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:56:06,647 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:06,647 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 79 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1128 Invalid, 0 Unknown, 197 Unchecked, 0.4s Time] [2022-02-11 00:56:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2022-02-11 00:56:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 3183. [2022-02-11 00:56:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 3182 states have (on average 3.3035826524198617) internal successors, (10512), 3182 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 10512 transitions. [2022-02-11 00:56:06,691 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 10512 transitions. Word has length 24 [2022-02-11 00:56:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:06,691 INFO L470 AbstractCegarLoop]: Abstraction has 3183 states and 10512 transitions. [2022-02-11 00:56:06,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-02-11 00:56:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 10512 transitions. [2022-02-11 00:56:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:06,696 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:06,696 INFO L515 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] [2022-02-11 00:56:06,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-02-11 00:56:06,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:06,897 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1140091753, now seen corresponding path program 24 times [2022-02-11 00:56:06,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:06,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021582832] [2022-02-11 00:56:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:06,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:07,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:07,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021582832] [2022-02-11 00:56:07,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021582832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:07,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191190940] [2022-02-11 00:56:07,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:56:07,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:07,097 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:07,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-02-11 00:56:07,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:56:07,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:07,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:07,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:07,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:07,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:07,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:07,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:07,397 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 37 treesize of output 21 [2022-02-11 00:56:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:07,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:07,688 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:56:07,688 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 20 treesize of output 43 [2022-02-11 00:56:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:07,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:07,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:07,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:56:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:07,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191190940] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:07,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:07,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:56:07,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386854799] [2022-02-11 00:56:07,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:07,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:56:07,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:07,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:56:07,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:56:07,756 INFO L87 Difference]: Start difference. First operand 3183 states and 10512 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:56:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:09,217 INFO L93 Difference]: Finished difference Result 3604 states and 11867 transitions. [2022-02-11 00:56:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:56:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:56:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:09,224 INFO L225 Difference]: With dead ends: 3604 [2022-02-11 00:56:09,224 INFO L226 Difference]: Without dead ends: 3598 [2022-02-11 00:56:09,224 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=2391, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:56:09,224 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 907 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:09,225 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 180 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1790 Invalid, 0 Unknown, 907 Unchecked, 0.7s Time] [2022-02-11 00:56:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-02-11 00:56:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3186. [2022-02-11 00:56:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.302668759811617) internal successors, (10519), 3185 states have internal predecessors, (10519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10519 transitions. [2022-02-11 00:56:09,274 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10519 transitions. Word has length 24 [2022-02-11 00:56:09,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:09,274 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 10519 transitions. [2022-02-11 00:56:09,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:56:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10519 transitions. [2022-02-11 00:56:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:09,279 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:09,279 INFO L515 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] [2022-02-11 00:56:09,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-02-11 00:56:09,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2022-02-11 00:56:09,479 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1890429969, now seen corresponding path program 25 times [2022-02-11 00:56:09,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:09,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973380760] [2022-02-11 00:56:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:09,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:09,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:09,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973380760] [2022-02-11 00:56:09,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973380760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:09,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517211624] [2022-02-11 00:56:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:56:09,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:09,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:09,681 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:09,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-02-11 00:56:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:09,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:09,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:09,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:09,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:09,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:09,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:09,994 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 37 treesize of output 21 [2022-02-11 00:56:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:10,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:10,280 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:56:10,281 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 20 treesize of output 43 [2022-02-11 00:56:10,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:10,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:10,330 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 20 treesize of output 3 [2022-02-11 00:56:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:10,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517211624] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:10,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:10,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:56:10,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549035698] [2022-02-11 00:56:10,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:10,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:56:10,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:56:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:56:10,346 INFO L87 Difference]: Start difference. First operand 3186 states and 10519 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:56:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:11,092 INFO L93 Difference]: Finished difference Result 3492 states and 11488 transitions. [2022-02-11 00:56:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:56:11,092 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:56:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:11,099 INFO L225 Difference]: With dead ends: 3492 [2022-02-11 00:56:11,099 INFO L226 Difference]: Without dead ends: 3490 [2022-02-11 00:56:11,099 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:56:11,100 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:11,100 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 165 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 994 Invalid, 0 Unknown, 261 Unchecked, 0.4s Time] [2022-02-11 00:56:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2022-02-11 00:56:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 3189. [2022-02-11 00:56:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3188 states have (on average 3.3017565872020076) internal successors, (10526), 3188 states have internal predecessors, (10526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 10526 transitions. [2022-02-11 00:56:11,147 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 10526 transitions. Word has length 24 [2022-02-11 00:56:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:11,148 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 10526 transitions. [2022-02-11 00:56:11,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:56:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 10526 transitions. [2022-02-11 00:56:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:11,153 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:11,153 INFO L515 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] [2022-02-11 00:56:11,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-02-11 00:56:11,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:11,353 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1357924184, now seen corresponding path program 9 times [2022-02-11 00:56:11,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:11,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042742562] [2022-02-11 00:56:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:11,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:11,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042742562] [2022-02-11 00:56:11,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042742562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:11,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465541430] [2022-02-11 00:56:11,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:56:11,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:11,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:11,562 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:11,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-02-11 00:56:11,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:56:11,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:11,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:56:11,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:11,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:11,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:11,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:11,900 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:56:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:12,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:12,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:12,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:12,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:12,570 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 41 treesize of output 56 [2022-02-11 00:56:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:12,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465541430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:12,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:12,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-02-11 00:56:12,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008788085] [2022-02-11 00:56:12,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:12,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:56:12,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:56:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:56:12,667 INFO L87 Difference]: Start difference. First operand 3189 states and 10526 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:56:15,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:15,408 INFO L93 Difference]: Finished difference Result 4340 states and 14622 transitions. [2022-02-11 00:56:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:56:15,408 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-02-11 00:56:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:15,417 INFO L225 Difference]: With dead ends: 4340 [2022-02-11 00:56:15,417 INFO L226 Difference]: Without dead ends: 4336 [2022-02-11 00:56:15,418 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=617, Invalid=4353, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:56:15,418 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 146 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 925 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:15,418 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 159 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 835 Invalid, 0 Unknown, 925 Unchecked, 0.4s Time] [2022-02-11 00:56:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2022-02-11 00:56:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3197. [2022-02-11 00:56:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 3.3003754693366707) internal successors, (10548), 3196 states have internal predecessors, (10548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10548 transitions. [2022-02-11 00:56:15,479 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10548 transitions. Word has length 24 [2022-02-11 00:56:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:15,479 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 10548 transitions. [2022-02-11 00:56:15,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2022-02-11 00:56:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10548 transitions. [2022-02-11 00:56:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:15,484 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:15,484 INFO L515 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] [2022-02-11 00:56:15,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-02-11 00:56:15,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:15,684 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:15,685 INFO L85 PathProgramCache]: Analyzing trace with hash 93478610, now seen corresponding path program 10 times [2022-02-11 00:56:15,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:15,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734500950] [2022-02-11 00:56:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:15,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:15,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:15,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734500950] [2022-02-11 00:56:15,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734500950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:15,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107789124] [2022-02-11 00:56:15,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:56:15,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:15,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:15,885 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:15,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-02-11 00:56:15,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:56:15,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:15,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:16,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:16,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:16,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:16,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:16,188 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 37 treesize of output 21 [2022-02-11 00:56:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:16,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:16,481 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:56:16,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-02-11 00:56:16,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:16,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:16,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:16,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:16,536 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 20 treesize of output 3 [2022-02-11 00:56:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:16,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107789124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:16,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:16,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-02-11 00:56:16,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920512794] [2022-02-11 00:56:16,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:16,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:56:16,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:16,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:56:16,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:56:16,551 INFO L87 Difference]: Start difference. First operand 3197 states and 10548 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:56:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:17,834 INFO L93 Difference]: Finished difference Result 3563 states and 11652 transitions. [2022-02-11 00:56:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:56:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 [2022-02-11 00:56:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:17,842 INFO L225 Difference]: With dead ends: 3563 [2022-02-11 00:56:17,842 INFO L226 Difference]: Without dead ends: 3559 [2022-02-11 00:56:17,842 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:56:17,842 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 121 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 482 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:17,842 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 264 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1546 Invalid, 0 Unknown, 482 Unchecked, 0.6s Time] [2022-02-11 00:56:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2022-02-11 00:56:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 3196. [2022-02-11 00:56:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3195 states have (on average 3.300469483568075) internal successors, (10545), 3195 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 10545 transitions. [2022-02-11 00:56:17,890 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 10545 transitions. Word has length 24 [2022-02-11 00:56:17,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:17,890 INFO L470 AbstractCegarLoop]: Abstraction has 3196 states and 10545 transitions. [2022-02-11 00:56:17,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-11 00:56:17,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 10545 transitions. [2022-02-11 00:56:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:17,895 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:17,895 INFO L515 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] [2022-02-11 00:56:17,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-02-11 00:56:18,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-02-11 00:56:18,096 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:18,096 INFO L85 PathProgramCache]: Analyzing trace with hash 48420723, now seen corresponding path program 26 times [2022-02-11 00:56:18,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:18,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910791986] [2022-02-11 00:56:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:18,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:18,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:18,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910791986] [2022-02-11 00:56:18,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910791986] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:18,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611338803] [2022-02-11 00:56:18,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:56:18,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:18,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:18,303 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:18,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-02-11 00:56:18,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:56:18,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 00:56:18,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:18,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:18,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:18,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:18,589 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 26 treesize of output 52 [2022-02-11 00:56:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:18,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:19,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-02-11 00:56:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:19,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611338803] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:19,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:19,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-11 00:56:19,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569118524] [2022-02-11 00:56:19,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:19,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:56:19,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:19,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:56:19,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:56:19,672 INFO L87 Difference]: Start difference. First operand 3196 states and 10545 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:20,589 INFO L93 Difference]: Finished difference Result 3836 states and 12765 transitions. [2022-02-11 00:56:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:56:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:20,596 INFO L225 Difference]: With dead ends: 3836 [2022-02-11 00:56:20,596 INFO L226 Difference]: Without dead ends: 3834 [2022-02-11 00:56:20,596 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=342, Invalid=2414, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:56:20,596 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 168 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:20,596 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 126 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 538 Invalid, 0 Unknown, 499 Unchecked, 0.3s Time] [2022-02-11 00:56:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2022-02-11 00:56:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3208. [2022-02-11 00:56:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 3.299968818210165) internal successors, (10583), 3207 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 10583 transitions. [2022-02-11 00:56:20,644 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 10583 transitions. Word has length 24 [2022-02-11 00:56:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:20,644 INFO L470 AbstractCegarLoop]: Abstraction has 3208 states and 10583 transitions. [2022-02-11 00:56:20,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 10583 transitions. [2022-02-11 00:56:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:20,649 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:20,649 INFO L515 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] [2022-02-11 00:56:20,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-02-11 00:56:20,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-02-11 00:56:20,850 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1606890507, now seen corresponding path program 27 times [2022-02-11 00:56:20,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:20,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047414468] [2022-02-11 00:56:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:20,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:21,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:21,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047414468] [2022-02-11 00:56:21,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047414468] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:21,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319090841] [2022-02-11 00:56:21,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:56:21,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:21,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:21,052 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:21,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-02-11 00:56:21,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:56:21,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:21,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:56:21,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:21,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:21,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:21,380 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-02-11 00:56:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:21,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:22,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:22,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:22,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:22,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-02-11 00:56:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:22,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319090841] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:22,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:22,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:56:22,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582017101] [2022-02-11 00:56:22,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:22,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:56:22,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:22,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:56:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:56:22,177 INFO L87 Difference]: Start difference. First operand 3208 states and 10583 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:23,131 INFO L93 Difference]: Finished difference Result 4328 states and 14745 transitions. [2022-02-11 00:56:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:56:23,131 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:23,140 INFO L225 Difference]: With dead ends: 4328 [2022-02-11 00:56:23,140 INFO L226 Difference]: Without dead ends: 4324 [2022-02-11 00:56:23,140 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=344, Invalid=2206, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:56:23,140 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:23,140 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 127 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 376 Invalid, 0 Unknown, 575 Unchecked, 0.2s Time] [2022-02-11 00:56:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2022-02-11 00:56:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3216. [2022-02-11 00:56:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.2973561430793157) internal successors, (10601), 3215 states have internal predecessors, (10601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 10601 transitions. [2022-02-11 00:56:23,212 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 10601 transitions. Word has length 24 [2022-02-11 00:56:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:23,213 INFO L470 AbstractCegarLoop]: Abstraction has 3216 states and 10601 transitions. [2022-02-11 00:56:23,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 10601 transitions. [2022-02-11 00:56:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:23,217 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:23,217 INFO L515 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] [2022-02-11 00:56:23,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-02-11 00:56:23,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-02-11 00:56:23,418 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1216633103, now seen corresponding path program 28 times [2022-02-11 00:56:23,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:23,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094436659] [2022-02-11 00:56:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:23,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:23,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:23,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094436659] [2022-02-11 00:56:23,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094436659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:23,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298853180] [2022-02-11 00:56:23,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:56:23,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:23,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:23,620 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:23,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-02-11 00:56:23,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:56:23,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:23,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:23,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:23,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:23,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:23,898 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 37 treesize of output 21 [2022-02-11 00:56:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:23,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:24,165 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:56:24,166 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 20 treesize of output 43 [2022-02-11 00:56:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:24,217 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 20 treesize of output 3 [2022-02-11 00:56:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:24,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298853180] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:24,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:24,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:56:24,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182743011] [2022-02-11 00:56:24,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:24,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:56:24,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:56:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:56:24,233 INFO L87 Difference]: Start difference. First operand 3216 states and 10601 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:24,984 INFO L93 Difference]: Finished difference Result 3588 states and 11818 transitions. [2022-02-11 00:56:24,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:56:24,984 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:24,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:24,990 INFO L225 Difference]: With dead ends: 3588 [2022-02-11 00:56:24,991 INFO L226 Difference]: Without dead ends: 3583 [2022-02-11 00:56:24,991 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:56:24,991 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 159 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 947 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:24,991 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 125 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1026 Invalid, 0 Unknown, 947 Unchecked, 0.4s Time] [2022-02-11 00:56:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2022-02-11 00:56:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 3202. [2022-02-11 00:56:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 3.3008434864104967) internal successors, (10566), 3201 states have internal predecessors, (10566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 10566 transitions. [2022-02-11 00:56:25,036 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 10566 transitions. Word has length 24 [2022-02-11 00:56:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:25,036 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 10566 transitions. [2022-02-11 00:56:25,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 10566 transitions. [2022-02-11 00:56:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:25,041 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:25,041 INFO L515 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] [2022-02-11 00:56:25,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-02-11 00:56:25,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:25,241 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1682349009, now seen corresponding path program 29 times [2022-02-11 00:56:25,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:25,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094303348] [2022-02-11 00:56:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:25,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:25,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094303348] [2022-02-11 00:56:25,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094303348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:25,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306471889] [2022-02-11 00:56:25,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:56:25,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:25,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:25,461 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:25,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-02-11 00:56:25,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:56:25,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:25,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:25,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:25,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:25,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:25,757 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 37 treesize of output 21 [2022-02-11 00:56:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:25,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:26,012 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:56:26,013 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 20 treesize of output 43 [2022-02-11 00:56:26,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:26,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:26,057 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 20 treesize of output 3 [2022-02-11 00:56:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:26,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306471889] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:26,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:26,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:56:26,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834856482] [2022-02-11 00:56:26,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:26,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:56:26,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:56:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:56:26,073 INFO L87 Difference]: Start difference. First operand 3202 states and 10566 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:26,901 INFO L93 Difference]: Finished difference Result 3512 states and 11599 transitions. [2022-02-11 00:56:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:56:26,901 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:26,908 INFO L225 Difference]: With dead ends: 3512 [2022-02-11 00:56:26,908 INFO L226 Difference]: Without dead ends: 3506 [2022-02-11 00:56:26,908 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:56:26,908 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:26,908 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 135 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1160 Invalid, 0 Unknown, 364 Unchecked, 0.4s Time] [2022-02-11 00:56:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2022-02-11 00:56:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 3204. [2022-02-11 00:56:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 3203 states have (on average 3.300031220730565) internal successors, (10570), 3203 states have internal predecessors, (10570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 10570 transitions. [2022-02-11 00:56:26,954 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 10570 transitions. Word has length 24 [2022-02-11 00:56:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:26,954 INFO L470 AbstractCegarLoop]: Abstraction has 3204 states and 10570 transitions. [2022-02-11 00:56:26,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 10570 transitions. [2022-02-11 00:56:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:26,959 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:26,959 INFO L515 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] [2022-02-11 00:56:26,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-02-11 00:56:27,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-02-11 00:56:27,160 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash 957307057, now seen corresponding path program 30 times [2022-02-11 00:56:27,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:27,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755765836] [2022-02-11 00:56:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:27,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:27,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:27,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755765836] [2022-02-11 00:56:27,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755765836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:27,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830143552] [2022-02-11 00:56:27,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:56:27,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:27,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:27,381 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:27,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-02-11 00:56:27,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:56:27,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:27,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:27,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:27,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:27,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:27,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:27,739 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 35 treesize of output 47 [2022-02-11 00:56:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:27,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:28,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:28,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:28,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:28,378 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 45 treesize of output 7 [2022-02-11 00:56:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:28,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830143552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:28,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:28,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-11 00:56:28,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086832919] [2022-02-11 00:56:28,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:28,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:56:28,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:56:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:56:28,408 INFO L87 Difference]: Start difference. First operand 3204 states and 10570 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:56:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:30,977 INFO L93 Difference]: Finished difference Result 3968 states and 13051 transitions. [2022-02-11 00:56:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 00:56:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-02-11 00:56:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:30,984 INFO L225 Difference]: With dead ends: 3968 [2022-02-11 00:56:30,985 INFO L226 Difference]: Without dead ends: 3956 [2022-02-11 00:56:30,985 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=654, Invalid=5352, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 00:56:30,985 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 216 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 779 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:30,985 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 182 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1344 Invalid, 0 Unknown, 779 Unchecked, 0.6s Time] [2022-02-11 00:56:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3956 states. [2022-02-11 00:56:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3956 to 3212. [2022-02-11 00:56:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3211 states have (on average 3.2980379943942695) internal successors, (10590), 3211 states have internal predecessors, (10590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 10590 transitions. [2022-02-11 00:56:31,035 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 10590 transitions. Word has length 24 [2022-02-11 00:56:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:31,035 INFO L470 AbstractCegarLoop]: Abstraction has 3212 states and 10590 transitions. [2022-02-11 00:56:31,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-11 00:56:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 10590 transitions. [2022-02-11 00:56:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:31,040 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:31,040 INFO L515 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] [2022-02-11 00:56:31,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-02-11 00:56:31,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2022-02-11 00:56:31,240 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 760793552, now seen corresponding path program 11 times [2022-02-11 00:56:31,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:31,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014873826] [2022-02-11 00:56:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:31,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:31,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:31,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014873826] [2022-02-11 00:56:31,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014873826] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:31,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445683948] [2022-02-11 00:56:31,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:56:31,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:31,468 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:31,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-02-11 00:56:31,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:56:31,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:31,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:31,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:31,775 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 37 treesize of output 21 [2022-02-11 00:56:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:31,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:32,028 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:56:32,028 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 20 treesize of output 43 [2022-02-11 00:56:32,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:32,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:32,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:32,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-02-11 00:56:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:32,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445683948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:32,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:32,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:56:32,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778201771] [2022-02-11 00:56:32,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:32,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:56:32,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:56:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:56:32,093 INFO L87 Difference]: Start difference. First operand 3212 states and 10590 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:32,721 INFO L93 Difference]: Finished difference Result 3489 states and 11543 transitions. [2022-02-11 00:56:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:56:32,721 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:32,727 INFO L225 Difference]: With dead ends: 3489 [2022-02-11 00:56:32,728 INFO L226 Difference]: Without dead ends: 3487 [2022-02-11 00:56:32,728 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:56:32,728 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:32,728 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 126 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 797 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-02-11 00:56:32,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2022-02-11 00:56:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 3210. [2022-02-11 00:56:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 3.298535369273917) internal successors, (10585), 3209 states have internal predecessors, (10585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 10585 transitions. [2022-02-11 00:56:32,773 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 10585 transitions. Word has length 24 [2022-02-11 00:56:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:32,773 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 10585 transitions. [2022-02-11 00:56:32,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 10585 transitions. [2022-02-11 00:56:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:32,778 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:32,778 INFO L515 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] [2022-02-11 00:56:32,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-02-11 00:56:32,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:32,978 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash 344375695, now seen corresponding path program 31 times [2022-02-11 00:56:32,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:32,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858299390] [2022-02-11 00:56:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:32,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:33,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:33,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858299390] [2022-02-11 00:56:33,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858299390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:33,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081731040] [2022-02-11 00:56:33,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:56:33,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:33,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:33,212 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:33,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-02-11 00:56:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:33,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:33,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:33,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:33,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:33,500 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 33 treesize of output 17 [2022-02-11 00:56:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:33,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:33,756 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:56:33,757 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 20 treesize of output 43 [2022-02-11 00:56:33,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:33,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:33,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:33,808 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 20 treesize of output 3 [2022-02-11 00:56:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:33,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081731040] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:33,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:33,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:56:33,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337248511] [2022-02-11 00:56:33,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:33,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:56:33,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:33,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:56:33,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:56:33,824 INFO L87 Difference]: Start difference. First operand 3210 states and 10585 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:34,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:34,687 INFO L93 Difference]: Finished difference Result 3552 states and 11697 transitions. [2022-02-11 00:56:34,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:56:34,687 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:34,694 INFO L225 Difference]: With dead ends: 3552 [2022-02-11 00:56:34,694 INFO L226 Difference]: Without dead ends: 3548 [2022-02-11 00:56:34,694 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:56:34,694 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 104 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:34,694 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 128 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1225 Invalid, 0 Unknown, 452 Unchecked, 0.5s Time] [2022-02-11 00:56:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-02-11 00:56:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3206. [2022-02-11 00:56:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 3.2998439937597506) internal successors, (10576), 3205 states have internal predecessors, (10576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 10576 transitions. [2022-02-11 00:56:34,751 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 10576 transitions. Word has length 24 [2022-02-11 00:56:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:34,752 INFO L470 AbstractCegarLoop]: Abstraction has 3206 states and 10576 transitions. [2022-02-11 00:56:34,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 10576 transitions. [2022-02-11 00:56:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:34,757 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:34,757 INFO L515 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] [2022-02-11 00:56:34,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-02-11 00:56:34,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:34,957 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1463078768, now seen corresponding path program 12 times [2022-02-11 00:56:34,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:34,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915694797] [2022-02-11 00:56:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:35,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:35,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915694797] [2022-02-11 00:56:35,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915694797] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:35,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823217249] [2022-02-11 00:56:35,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:56:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:35,177 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:35,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-02-11 00:56:35,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:56:35,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:35,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:56:35,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:35,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:35,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:35,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:35,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:35,456 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 26 treesize of output 44 [2022-02-11 00:56:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:35,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:35,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-02-11 00:56:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:35,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823217249] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:35,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:35,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-11 00:56:35,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13959356] [2022-02-11 00:56:35,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:35,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:56:35,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:56:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:56:35,950 INFO L87 Difference]: Start difference. First operand 3206 states and 10576 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:39,096 INFO L93 Difference]: Finished difference Result 3981 states and 13140 transitions. [2022-02-11 00:56:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 00:56:39,097 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:39,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:39,104 INFO L225 Difference]: With dead ends: 3981 [2022-02-11 00:56:39,104 INFO L226 Difference]: Without dead ends: 3977 [2022-02-11 00:56:39,104 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=812, Invalid=6844, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 00:56:39,104 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 260 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 929 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:39,104 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 151 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2143 Invalid, 0 Unknown, 929 Unchecked, 0.9s Time] [2022-02-11 00:56:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2022-02-11 00:56:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3203. [2022-02-11 00:56:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 3.3004372267332918) internal successors, (10568), 3202 states have internal predecessors, (10568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 10568 transitions. [2022-02-11 00:56:39,154 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 10568 transitions. Word has length 24 [2022-02-11 00:56:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:39,154 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 10568 transitions. [2022-02-11 00:56:39,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 10568 transitions. [2022-02-11 00:56:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:39,159 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:39,159 INFO L515 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] [2022-02-11 00:56:39,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-02-11 00:56:39,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:39,360 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1554115117, now seen corresponding path program 32 times [2022-02-11 00:56:39,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:39,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460224243] [2022-02-11 00:56:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:39,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:39,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:39,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460224243] [2022-02-11 00:56:39,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460224243] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:39,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458730134] [2022-02-11 00:56:39,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:56:39,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:39,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:39,597 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:39,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-02-11 00:56:39,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:56:39,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:39,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:56:39,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:39,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:39,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:39,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:39,923 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 00:56:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:40,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:40,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:40,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:40,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:40,579 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 41 treesize of output 56 [2022-02-11 00:56:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:40,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458730134] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:40,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:40,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:56:40,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197130461] [2022-02-11 00:56:40,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:40,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:56:40,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:40,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:56:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:56:40,657 INFO L87 Difference]: Start difference. First operand 3203 states and 10568 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:41,585 INFO L93 Difference]: Finished difference Result 3784 states and 12633 transitions. [2022-02-11 00:56:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:56:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:56:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:41,593 INFO L225 Difference]: With dead ends: 3784 [2022-02-11 00:56:41,593 INFO L226 Difference]: Without dead ends: 3777 [2022-02-11 00:56:41,594 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:56:41,594 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:41,594 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 190 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 584 Invalid, 0 Unknown, 621 Unchecked, 0.3s Time] [2022-02-11 00:56:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2022-02-11 00:56:41,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3225. [2022-02-11 00:56:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 3.2968362282878414) internal successors, (10629), 3224 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 10629 transitions. [2022-02-11 00:56:41,653 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 10629 transitions. Word has length 24 [2022-02-11 00:56:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:41,653 INFO L470 AbstractCegarLoop]: Abstraction has 3225 states and 10629 transitions. [2022-02-11 00:56:41,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 10629 transitions. [2022-02-11 00:56:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:41,658 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:41,658 INFO L515 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] [2022-02-11 00:56:41,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-02-11 00:56:41,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:41,858 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:41,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1179944853, now seen corresponding path program 33 times [2022-02-11 00:56:41,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:41,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639249025] [2022-02-11 00:56:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:41,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:42,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:42,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639249025] [2022-02-11 00:56:42,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639249025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:42,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58958724] [2022-02-11 00:56:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:56:42,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:42,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:42,096 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:42,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-02-11 00:56:42,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:56:42,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:42,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:56:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:42,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:42,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:42,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:42,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:42,552 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 33 treesize of output 21 [2022-02-11 00:56:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:42,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:42,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:42,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:56:42,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-02-11 00:56:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:43,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58958724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:43,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:43,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 00:56:43,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169194936] [2022-02-11 00:56:43,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:43,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:56:43,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:43,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:56:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:56:43,000 INFO L87 Difference]: Start difference. First operand 3225 states and 10629 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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) [2022-02-11 00:56:44,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:44,478 INFO L93 Difference]: Finished difference Result 3691 states and 12146 transitions. [2022-02-11 00:56:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:56:44,479 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 [2022-02-11 00:56:44,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:44,486 INFO L225 Difference]: With dead ends: 3691 [2022-02-11 00:56:44,486 INFO L226 Difference]: Without dead ends: 3685 [2022-02-11 00:56:44,486 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=354, Invalid=2508, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:56:44,487 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 184 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 676 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:44,487 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 125 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1443 Invalid, 0 Unknown, 676 Unchecked, 0.6s Time] [2022-02-11 00:56:44,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2022-02-11 00:56:44,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3217. [2022-02-11 00:56:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 3.2997512437810945) internal successors, (10612), 3216 states have internal predecessors, (10612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 10612 transitions. [2022-02-11 00:56:44,536 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 10612 transitions. Word has length 24 [2022-02-11 00:56:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:44,536 INFO L470 AbstractCegarLoop]: Abstraction has 3217 states and 10612 transitions. [2022-02-11 00:56:44,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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) [2022-02-11 00:56:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 10612 transitions. [2022-02-11 00:56:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:44,541 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:44,541 INFO L515 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] [2022-02-11 00:56:44,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-02-11 00:56:44,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-02-11 00:56:44,742 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:44,742 INFO L85 PathProgramCache]: Analyzing trace with hash 854256491, now seen corresponding path program 34 times [2022-02-11 00:56:44,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:44,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577664647] [2022-02-11 00:56:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:44,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:44,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:44,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577664647] [2022-02-11 00:56:44,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577664647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:44,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466979553] [2022-02-11 00:56:44,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:56:44,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:44,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:44,985 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:56:44,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-02-11 00:56:45,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:56:45,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:45,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:56:45,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:45,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:45,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:45,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:45,207 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 34 treesize of output 20 [2022-02-11 00:56:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:45,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:45,512 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-02-11 00:56:45,512 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 20 treesize of output 43 [2022-02-11 00:56:45,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:45,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:56:45,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:45,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:56:45,559 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 20 treesize of output 3 [2022-02-11 00:56:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:45,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466979553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:45,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:45,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-02-11 00:56:45,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128839999] [2022-02-11 00:56:45,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:45,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:56:45,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:56:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:56:45,575 INFO L87 Difference]: Start difference. First operand 3217 states and 10612 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:56:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:46,335 INFO L93 Difference]: Finished difference Result 3469 states and 11493 transitions. [2022-02-11 00:56:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:56:46,335 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 [2022-02-11 00:56:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:46,342 INFO L225 Difference]: With dead ends: 3469 [2022-02-11 00:56:46,342 INFO L226 Difference]: Without dead ends: 3463 [2022-02-11 00:56:46,342 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:56:46,342 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 539 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:46,342 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 105 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1187 Invalid, 0 Unknown, 539 Unchecked, 0.4s Time] [2022-02-11 00:56:46,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3463 states. [2022-02-11 00:56:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3463 to 3218. [2022-02-11 00:56:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 3.2993472179048804) internal successors, (10614), 3217 states have internal predecessors, (10614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 10614 transitions. [2022-02-11 00:56:46,387 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 10614 transitions. Word has length 24 [2022-02-11 00:56:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:46,387 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 10614 transitions. [2022-02-11 00:56:46,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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) [2022-02-11 00:56:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 10614 transitions. [2022-02-11 00:56:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:56:46,402 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:46,402 INFO L515 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] Received shutdown request... [2022-02-11 00:56:46,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-02-11 00:56:46,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-02-11 00:56:46,607 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-02-11 00:56:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1922545167, now seen corresponding path program 35 times [2022-02-11 00:56:46,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:46,610 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (6 of 7 remaining) [2022-02-11 00:56:46,611 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1070896806]. [2022-02-11 00:56:46,612 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION (5 of 7 remaining) [2022-02-11 00:56:46,612 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5INUSE_VIOLATION (4 of 7 remaining) [2022-02-11 00:56:46,612 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (3 of 7 remaining) [2022-02-11 00:56:46,612 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (2 of 7 remaining) [2022-02-11 00:56:46,612 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err0INUSE_VIOLATION (1 of 7 remaining) [2022-02-11 00:56:46,612 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err1INUSE_VIOLATION (0 of 7 remaining) [2022-02-11 00:56:46,614 INFO L733 BasicCegarLoop]: Path program histogram: [145, 43, 35, 25, 25, 21, 12, 7, 6, 6, 3, 2, 2, 1, 1] [2022-02-11 00:56:46,616 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 00:56:46,616 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 00:56:46,616 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 [2022-02-11 00:56:46,617 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 12:56:46 BasicIcfg [2022-02-11 00:56:46,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 00:56:46,617 INFO L158 Benchmark]: Toolchain (without parser) took 784706.39ms. Allocated memory was 208.7MB in the beginning and 380.6MB in the end (delta: 172.0MB). Free memory was 173.1MB in the beginning and 324.9MB in the end (delta: -151.8MB). Peak memory consumption was 234.1MB. Max. memory is 8.0GB. [2022-02-11 00:56:46,617 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 208.7MB. Free memory was 174.4MB in the beginning and 174.3MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 00:56:46,617 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.50ms. Allocated memory is still 208.7MB. Free memory was 173.1MB in the beginning and 171.5MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-11 00:56:46,617 INFO L158 Benchmark]: Boogie Preprocessor took 10.24ms. Allocated memory is still 208.7MB. Free memory was 171.5MB in the beginning and 170.6MB in the end (delta: 939.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 00:56:46,617 INFO L158 Benchmark]: RCFGBuilder took 212.87ms. Allocated memory is still 208.7MB. Free memory was 170.5MB in the beginning and 160.2MB in the end (delta: 10.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-11 00:56:46,617 INFO L158 Benchmark]: TraceAbstraction took 784459.93ms. Allocated memory was 208.7MB in the beginning and 380.6MB in the end (delta: 172.0MB). Free memory was 159.7MB in the beginning and 324.9MB in the end (delta: -165.2MB). Peak memory consumption was 219.5MB. Max. memory is 8.0GB. [2022-02-11 00:56:46,618 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 0.11ms. Allocated memory is still 208.7MB. Free memory was 174.4MB in the beginning and 174.3MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.50ms. Allocated memory is still 208.7MB. Free memory was 173.1MB in the beginning and 171.5MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.24ms. Allocated memory is still 208.7MB. Free memory was 171.5MB in the beginning and 170.6MB in the end (delta: 939.2kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 212.87ms. Allocated memory is still 208.7MB. Free memory was 170.5MB in the beginning and 160.2MB in the end (delta: 10.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 784459.93ms. Allocated memory was 208.7MB in the beginning and 380.6MB in the end (delta: 172.0MB). Free memory was 159.7MB in the beginning and 324.9MB in the end (delta: -165.2MB). Peak memory consumption was 219.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1070896806]. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1070896806]. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1070896806]. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1070896806]. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1070896806]. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1070896806]. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1070896806]. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 784.3s, OverallIterations: 334, TraceHistogramMax: 2, PathProgramHistogramMax: 145, EmptinessCheckTime: 0.9s, AutomataDifference: 429.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51641 SdHoareTripleChecker+Valid, 159.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51641 mSDsluCounter, 48015 SdHoareTripleChecker+Invalid, 135.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 194845 IncrementalHoareTripleChecker+Unchecked, 268654 mSDsCounter, 13757 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 399874 IncrementalHoareTripleChecker+Invalid, 608476 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13757 mSolverCounterUnsat, 4131 mSDtfsCounter, 399874 mSolverCounterSat, 1.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 26306 GetRequests, 9897 SyntacticMatches, 1658 SemanticMatches, 14751 ConstructedPredicates, 0 IntricatePredicates, 89 DeprecatedPredicates, 199818 ImplicationChecksByTransitivity, 376.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3233occurred in iteration=304, InterpolantAutomatonStates: 11680, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.5s AutomataMinimizationTime, 333 MinimizatonAttempts, 197133 StatesRemovedByMinimization, 332 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 269.8s InterpolantComputationTime, 15020 NumberOfCodeBlocks, 15020 NumberOfCodeBlocksAsserted, 1021 NumberOfCheckSat, 21449 ConstructedInterpolants, 3296 QuantifiedInterpolants, 388054 SizeOfPredicates, 2970 NumberOfNonLiveVariables, 25914 ConjunctsInSsa, 9139 ConjunctsInUnsatCore, 975 InterpolantComputations, 12 PerfectInterpolantSequences, 238/5806 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