/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:57:47,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:57:47,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:57:47,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:57:47,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:57:47,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:57:47,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:57:47,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:57:47,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:57:47,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:57:47,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:57:47,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-21 17:57:47,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:57:47,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:57:47,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:57:47,642 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-Delay.epf [2021-08-21 17:57:47,679 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:57:47,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:57:47,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:57:47,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:57:47,683 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:57:47,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:57:47,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:57:47,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:57:47,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:57:47,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:57:47,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:57:47,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:57:47,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:57:47,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:57:47,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:57:47,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:57:47,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:57:47,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:57:47,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:57:47,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:57:47,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:57:47,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:57:47,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:57:47,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:57:47,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:57:47,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:57:47,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:57:47,687 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:57:47,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:57:47,688 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:57:47,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:57:47,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:57:47,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:57:47,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:57:47,971 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:57:47,972 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:57:47,973 INFO L432 ainManager$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 [2021-08-21 17:57:47,973 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2021-08-21 17:57:48,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:57:48,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:57:48,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:57:48,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:57:48,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:57:48,018 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 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,024 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 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:57:48,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:57:48,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:57:48,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:57:48,039 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 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,039 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 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,040 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 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,040 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 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,043 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 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,045 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 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,046 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 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:57:48,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:57:48,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:57:48,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:57:48,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:48" (1/1) ... [2021-08-21 17:57:48,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:57:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:48,076 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) [2021-08-21 17:57:48,079 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 [2021-08-21 17:57:48,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:57:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:57:48,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:57:48,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:57:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:57:48,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:57:48,113 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:57:48,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:57:48,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:57:48,115 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 17:57:48,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 17:57:48,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 17:57:48,115 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 17:57:48,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 17:57:48,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 17:57:48,118 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 17:57:48,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:57:48,367 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-21 17:57:48,367 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 17:57:48,368 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-21 17:57:48,368 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-08-21 17:57:48,369 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:57:48 BoogieIcfgContainer [2021-08-21 17:57:48,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:57:48,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:57:48,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:57:48,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:57:48,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:48" (1/2) ... [2021-08-21 17:57:48,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e77805a and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:57:48, skipping insertion in model container [2021-08-21 17:57:48,374 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 21.08 05:57:48" (2/2) ... [2021-08-21 17:57:48,376 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2021-08-21 17:57:48,380 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:57:48,380 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:57:48,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:57:48,380 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:57:48,489 INFO L148 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-08-21 17:57:48,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:57:48,536 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, mConcurrency=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 [2021-08-21 17:57:48,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-21 17:57:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 74 states have (on average 2.054054054054054) internal successors, (152), 102 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:57:48,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:48,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:48,755 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:48,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1893381519, now seen corresponding path program 1 times [2021-08-21 17:57:48,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:48,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590889621] [2021-08-21 17:57:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:48,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:49,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:49,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590889621] [2021-08-21 17:57:49,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590889621] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:57:49,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:57:49,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:57:49,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99880136] [2021-08-21 17:57:49,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:57:49,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:57:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:57:49,029 INFO L87 Difference]: Start difference. First operand has 103 states, 74 states have (on average 2.054054054054054) internal successors, (152), 102 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-08-21 17:57:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:49,079 INFO L93 Difference]: Finished difference Result 253 states and 360 transitions. [2021-08-21 17:57:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:57:49,081 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 [2021-08-21 17:57:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:49,088 INFO L225 Difference]: With dead ends: 253 [2021-08-21 17:57:49,088 INFO L226 Difference]: Without dead ends: 44 [2021-08-21 17:57:49,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:57:49,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-21 17:57:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2021-08-21 17:57:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2021-08-21 17:57:49,114 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 42 transitions. Word has length 16 [2021-08-21 17:57:49,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:49,115 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 42 transitions. [2021-08-21 17:57:49,115 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) [2021-08-21 17:57:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 42 transitions. [2021-08-21 17:57:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:57:49,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:49,116 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:49,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:57:49,117 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash -149140301, now seen corresponding path program 1 times [2021-08-21 17:57:49,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:49,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401544931] [2021-08-21 17:57:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:49,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:49,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:49,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401544931] [2021-08-21 17:57:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401544931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:49,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031469247] [2021-08-21 17:57:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:49,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:49,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:49,189 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) [2021-08-21 17:57:49,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 17:57:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:49,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:57:49,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:49,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031469247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:49,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:49,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:57:49,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871050323] [2021-08-21 17:57:49,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:57:49,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:57:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:57:49,383 INFO L87 Difference]: Start difference. First operand 28 states and 42 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) [2021-08-21 17:57:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:49,453 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2021-08-21 17:57:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:57:49,457 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 [2021-08-21 17:57:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:49,460 INFO L225 Difference]: With dead ends: 39 [2021-08-21 17:57:49,460 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 17:57:49,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:57:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 17:57:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2021-08-21 17:57:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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) [2021-08-21 17:57:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2021-08-21 17:57:49,464 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 18 [2021-08-21 17:57:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:49,464 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2021-08-21 17:57:49,464 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) [2021-08-21 17:57:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2021-08-21 17:57:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:57:49,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:49,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:49,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 17:57:49,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:49,685 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:49,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2075639507, now seen corresponding path program 1 times [2021-08-21 17:57:49,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:49,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66665054] [2021-08-21 17:57:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:49,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:49,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:49,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66665054] [2021-08-21 17:57:49,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66665054] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:57:49,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:57:49,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:57:49,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310209084] [2021-08-21 17:57:49,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:57:49,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:57:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:57:49,743 INFO L87 Difference]: Start difference. First operand 24 states and 34 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) [2021-08-21 17:57:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:49,783 INFO L93 Difference]: Finished difference Result 30 states and 43 transitions. [2021-08-21 17:57:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:57:49,783 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 [2021-08-21 17:57:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:49,786 INFO L225 Difference]: With dead ends: 30 [2021-08-21 17:57:49,786 INFO L226 Difference]: Without dead ends: 26 [2021-08-21 17:57:49,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:57:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-21 17:57:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-21 17:57:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2021-08-21 17:57:49,797 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 18 [2021-08-21 17:57:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:49,798 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2021-08-21 17:57:49,798 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) [2021-08-21 17:57:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2021-08-21 17:57:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:57:49,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:49,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:49,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:57:49,801 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1040762731, now seen corresponding path program 1 times [2021-08-21 17:57:49,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:49,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609677850] [2021-08-21 17:57:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:49,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:50,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:50,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609677850] [2021-08-21 17:57:50,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609677850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:50,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201957693] [2021-08-21 17:57:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:50,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:50,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:50,065 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) [2021-08-21 17:57:50,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 17:57:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:50,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:57:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:50,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-21 17:57:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:50,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201957693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:50,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:50,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-21 17:57:50,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443089737] [2021-08-21 17:57:50,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:57:50,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:50,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:57:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:57:50,565 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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) [2021-08-21 17:57:50,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:50,807 INFO L93 Difference]: Finished difference Result 58 states and 84 transitions. [2021-08-21 17:57:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:57:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 [2021-08-21 17:57:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:50,811 INFO L225 Difference]: With dead ends: 58 [2021-08-21 17:57:50,811 INFO L226 Difference]: Without dead ends: 52 [2021-08-21 17:57:50,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:57:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-21 17:57:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 34. [2021-08-21 17:57:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 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) [2021-08-21 17:57:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 51 transitions. [2021-08-21 17:57:50,823 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 51 transitions. Word has length 20 [2021-08-21 17:57:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:50,823 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 51 transitions. [2021-08-21 17:57:50,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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) [2021-08-21 17:57:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 51 transitions. [2021-08-21 17:57:50,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:57:50,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:50,825 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:50,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:51,044 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,SelfDestructingSolverStorable3 [2021-08-21 17:57:51,045 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash 190683642, now seen corresponding path program 1 times [2021-08-21 17:57:51,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:51,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466324195] [2021-08-21 17:57:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:51,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:51,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:51,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466324195] [2021-08-21 17:57:51,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466324195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:51,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207077189] [2021-08-21 17:57:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:51,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:51,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:51,231 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) [2021-08-21 17:57:51,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 17:57:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:51,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:57:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:51,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-21 17:57:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:51,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207077189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:51,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:51,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-21 17:57:51,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162215928] [2021-08-21 17:57:51,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:57:51,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:57:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:57:51,658 INFO L87 Difference]: Start difference. First operand 34 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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) [2021-08-21 17:57:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:51,858 INFO L93 Difference]: Finished difference Result 64 states and 95 transitions. [2021-08-21 17:57:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:57:51,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20 [2021-08-21 17:57:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:51,859 INFO L225 Difference]: With dead ends: 64 [2021-08-21 17:57:51,859 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 17:57:51,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:57:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 17:57:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2021-08-21 17:57:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 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) [2021-08-21 17:57:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 55 transitions. [2021-08-21 17:57:51,863 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 55 transitions. Word has length 20 [2021-08-21 17:57:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:51,863 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 55 transitions. [2021-08-21 17:57:51,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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) [2021-08-21 17:57:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 55 transitions. [2021-08-21 17:57:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:57:51,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:51,864 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:51,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:52,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:52,081 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:52,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1983859159, now seen corresponding path program 2 times [2021-08-21 17:57:52,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:52,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029286567] [2021-08-21 17:57:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:52,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:52,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:52,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029286567] [2021-08-21 17:57:52,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029286567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:52,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127596362] [2021-08-21 17:57:52,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:57:52,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:52,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:52,133 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) [2021-08-21 17:57:52,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 17:57:52,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:57:52,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:52,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:57:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:52,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127596362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:52,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:52,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 17:57:52,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603582] [2021-08-21 17:57:52,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:57:52,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:52,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:57:52,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:57:52,342 INFO L87 Difference]: Start difference. First operand 36 states and 55 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) [2021-08-21 17:57:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:52,400 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2021-08-21 17:57:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:57:52,400 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 [2021-08-21 17:57:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:52,401 INFO L225 Difference]: With dead ends: 49 [2021-08-21 17:57:52,401 INFO L226 Difference]: Without dead ends: 49 [2021-08-21 17:57:52,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:57:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-21 17:57:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2021-08-21 17:57:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2021-08-21 17:57:52,404 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 22 [2021-08-21 17:57:52,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:52,404 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2021-08-21 17:57:52,404 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) [2021-08-21 17:57:52,404 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2021-08-21 17:57:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:57:52,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:52,405 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:52,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:52,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:52,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:52,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:52,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1103541239, now seen corresponding path program 3 times [2021-08-21 17:57:52,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:52,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240102336] [2021-08-21 17:57:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:52,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:52,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:52,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240102336] [2021-08-21 17:57:52,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240102336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:52,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676528696] [2021-08-21 17:57:52,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:57:52,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:52,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:52,684 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) [2021-08-21 17:57:52,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 17:57:52,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:57:52,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:52,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:57:52,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:52,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676528696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:52,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:52,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 17:57:52,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683522562] [2021-08-21 17:57:52,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:57:52,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:57:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:57:52,886 INFO L87 Difference]: Start difference. First operand 28 states and 40 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) [2021-08-21 17:57:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:52,935 INFO L93 Difference]: Finished difference Result 39 states and 57 transitions. [2021-08-21 17:57:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:57:52,935 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 [2021-08-21 17:57:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:52,936 INFO L225 Difference]: With dead ends: 39 [2021-08-21 17:57:52,936 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 17:57:52,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:57:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 17:57:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-21 17:57:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 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) [2021-08-21 17:57:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2021-08-21 17:57:52,942 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 22 [2021-08-21 17:57:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:52,943 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2021-08-21 17:57:52,943 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) [2021-08-21 17:57:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2021-08-21 17:57:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:57:52,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:52,943 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:52,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:53,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:53,165 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:53,165 INFO L82 PathProgramCache]: Analyzing trace with hash 72318137, now seen corresponding path program 4 times [2021-08-21 17:57:53,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:53,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597703067] [2021-08-21 17:57:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:53,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:53,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:53,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597703067] [2021-08-21 17:57:53,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597703067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:53,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365433253] [2021-08-21 17:57:53,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:57:53,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:53,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:53,560 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) [2021-08-21 17:57:53,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 17:57:53,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:57:53,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:53,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 17:57:53,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:54,196 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 17:57:54,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-21 17:57:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:54,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365433253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:54,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:54,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2021-08-21 17:57:54,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229363777] [2021-08-21 17:57:54,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:57:54,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:57:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:57:54,317 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:55,083 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2021-08-21 17:57:55,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:57:55,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:57:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:55,085 INFO L225 Difference]: With dead ends: 68 [2021-08-21 17:57:55,085 INFO L226 Difference]: Without dead ends: 62 [2021-08-21 17:57:55,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 817.5ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:57:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-21 17:57:55,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-08-21 17:57:55,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 63 transitions. [2021-08-21 17:57:55,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 63 transitions. Word has length 24 [2021-08-21 17:57:55,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:55,091 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 63 transitions. [2021-08-21 17:57:55,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 63 transitions. [2021-08-21 17:57:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:57:55,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:55,092 INFO L512 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] [2021-08-21 17:57:55,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:55,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:55,301 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:55,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1918691106, now seen corresponding path program 1 times [2021-08-21 17:57:55,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:55,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794301701] [2021-08-21 17:57:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:55,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:55,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:55,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794301701] [2021-08-21 17:57:55,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794301701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:55,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669102841] [2021-08-21 17:57:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:55,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:55,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:55,651 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) [2021-08-21 17:57:55,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 17:57:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:55,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 17:57:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:56,271 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 17:57:56,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-21 17:57:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:56,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669102841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:56,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:56,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2021-08-21 17:57:56,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033578693] [2021-08-21 17:57:56,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:57:56,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:57:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:57:56,388 INFO L87 Difference]: Start difference. First operand 42 states and 63 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-08-21 17:57:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:57,200 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2021-08-21 17:57:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:57:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 24 [2021-08-21 17:57:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:57,202 INFO L225 Difference]: With dead ends: 98 [2021-08-21 17:57:57,202 INFO L226 Difference]: Without dead ends: 86 [2021-08-21 17:57:57,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 820.5ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:57:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-21 17:57:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 46. [2021-08-21 17:57:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6) internal successors, (72), 45 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 72 transitions. [2021-08-21 17:57:57,206 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 72 transitions. Word has length 24 [2021-08-21 17:57:57,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:57,206 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 72 transitions. [2021-08-21 17:57:57,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-08-21 17:57:57,206 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 72 transitions. [2021-08-21 17:57:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:57:57,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:57,207 INFO L512 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] [2021-08-21 17:57:57,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:57,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:57,433 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1133587222, now seen corresponding path program 2 times [2021-08-21 17:57:57,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:57,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666311486] [2021-08-21 17:57:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:57,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:57,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:57,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666311486] [2021-08-21 17:57:57,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666311486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:57,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136639159] [2021-08-21 17:57:57,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:57:57,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:57,805 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) [2021-08-21 17:57:57,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 17:57:57,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:57:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 17:57:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:58,702 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-21 17:57:58,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-21 17:57:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:58,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136639159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:58,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:58,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-08-21 17:57:58,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360060817] [2021-08-21 17:57:58,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:57:58,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:58,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:57:58,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:57:58,811 INFO L87 Difference]: Start difference. First operand 46 states and 72 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-08-21 17:57:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:59,457 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2021-08-21 17:57:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:57:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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 24 [2021-08-21 17:57:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:59,459 INFO L225 Difference]: With dead ends: 73 [2021-08-21 17:57:59,459 INFO L226 Difference]: Without dead ends: 67 [2021-08-21 17:57:59,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 735.8ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:57:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-21 17:57:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-08-21 17:57:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2021-08-21 17:57:59,463 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 24 [2021-08-21 17:57:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:59,463 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2021-08-21 17:57:59,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-08-21 17:57:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2021-08-21 17:57:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:57:59,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:59,464 INFO L512 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] [2021-08-21 17:57:59,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:59,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 17:57:59,689 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:57:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:59,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1651177870, now seen corresponding path program 3 times [2021-08-21 17:57:59,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:59,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542015476] [2021-08-21 17:57:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:59,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:00,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:00,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542015476] [2021-08-21 17:58:00,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542015476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:00,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116101954] [2021-08-21 17:58:00,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:00,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:00,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:00,008 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) [2021-08-21 17:58:00,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 17:58:00,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:58:00,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:00,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 17:58:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:00,876 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-21 17:58:00,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-21 17:58:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:00,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116101954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:00,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:00,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-08-21 17:58:00,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606955823] [2021-08-21 17:58:00,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:58:00,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:58:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:58:00,961 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-08-21 17:58:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:01,869 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2021-08-21 17:58:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:58:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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 24 [2021-08-21 17:58:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:01,870 INFO L225 Difference]: With dead ends: 88 [2021-08-21 17:58:01,871 INFO L226 Difference]: Without dead ends: 76 [2021-08-21 17:58:01,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 974.1ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:58:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-21 17:58:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-08-21 17:58:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 53 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2021-08-21 17:58:01,874 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 24 [2021-08-21 17:58:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:01,874 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2021-08-21 17:58:01,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-08-21 17:58:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2021-08-21 17:58:01,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:58:01,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:01,875 INFO L512 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] [2021-08-21 17:58:01,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:02,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:02,085 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:02,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1347225100, now seen corresponding path program 4 times [2021-08-21 17:58:02,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:02,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348009423] [2021-08-21 17:58:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:02,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:02,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:02,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348009423] [2021-08-21 17:58:02,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348009423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:02,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098879810] [2021-08-21 17:58:02,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:58:02,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:02,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:02,443 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) [2021-08-21 17:58:02,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 17:58:02,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:58:02,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:02,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 17:58:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:03,182 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 17:58:03,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-21 17:58:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:03,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098879810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:03,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:03,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2021-08-21 17:58:03,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978649694] [2021-08-21 17:58:03,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:58:03,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:58:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:58:03,282 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 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) [2021-08-21 17:58:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:04,014 INFO L93 Difference]: Finished difference Result 85 states and 128 transitions. [2021-08-21 17:58:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:58:04,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 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 24 [2021-08-21 17:58:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:04,015 INFO L225 Difference]: With dead ends: 85 [2021-08-21 17:58:04,015 INFO L226 Difference]: Without dead ends: 79 [2021-08-21 17:58:04,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 819.2ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:58:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-21 17:58:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2021-08-21 17:58:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 53 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2021-08-21 17:58:04,019 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 24 [2021-08-21 17:58:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:04,019 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2021-08-21 17:58:04,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 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) [2021-08-21 17:58:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2021-08-21 17:58:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:58:04,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:04,020 INFO L512 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] [2021-08-21 17:58:04,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:04,224 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,SelfDestructingSolverStorable11 [2021-08-21 17:58:04,225 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1743989150, now seen corresponding path program 5 times [2021-08-21 17:58:04,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:04,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750080229] [2021-08-21 17:58:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:04,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:04,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:04,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750080229] [2021-08-21 17:58:04,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750080229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:04,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477369937] [2021-08-21 17:58:04,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:58:04,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:04,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:04,541 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) [2021-08-21 17:58:04,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 17:58:04,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:58:04,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 17:58:04,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:05,322 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 17:58:05,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-21 17:58:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:05,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477369937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:05,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:05,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2021-08-21 17:58:05,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745718346] [2021-08-21 17:58:05,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:58:05,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:05,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:58:05,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:58:05,435 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 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) [2021-08-21 17:58:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:06,220 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2021-08-21 17:58:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:58:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 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 24 [2021-08-21 17:58:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:06,221 INFO L225 Difference]: With dead ends: 111 [2021-08-21 17:58:06,221 INFO L226 Difference]: Without dead ends: 99 [2021-08-21 17:58:06,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 887.1ms TimeCoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:58:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-21 17:58:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 55. [2021-08-21 17:58:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2021-08-21 17:58:06,224 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 24 [2021-08-21 17:58:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:06,225 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2021-08-21 17:58:06,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 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) [2021-08-21 17:58:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2021-08-21 17:58:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:58:06,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:06,225 INFO L512 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] [2021-08-21 17:58:06,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:06,440 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,SelfDestructingSolverStorable12 [2021-08-21 17:58:06,441 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash -736823172, now seen corresponding path program 6 times [2021-08-21 17:58:06,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:06,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74362996] [2021-08-21 17:58:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:06,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:06,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:06,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74362996] [2021-08-21 17:58:06,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74362996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:06,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749605402] [2021-08-21 17:58:06,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:58:06,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:06,801 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) [2021-08-21 17:58:06,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 17:58:07,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:58:07,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:07,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 17:58:07,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:07,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:07,632 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-21 17:58:07,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-08-21 17:58:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:07,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749605402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:07,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:07,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-08-21 17:58:07,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495473144] [2021-08-21 17:58:07,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:58:07,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:07,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:58:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:58:07,970 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 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) [2021-08-21 17:58:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:08,802 INFO L93 Difference]: Finished difference Result 80 states and 119 transitions. [2021-08-21 17:58:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:58:08,803 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 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 24 [2021-08-21 17:58:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:08,803 INFO L225 Difference]: With dead ends: 80 [2021-08-21 17:58:08,803 INFO L226 Difference]: Without dead ends: 74 [2021-08-21 17:58:08,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1055.5ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:58:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-21 17:58:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-08-21 17:58:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2021-08-21 17:58:08,806 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 24 [2021-08-21 17:58:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:08,806 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2021-08-21 17:58:08,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 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) [2021-08-21 17:58:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2021-08-21 17:58:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:58:08,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:08,807 INFO L512 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] [2021-08-21 17:58:08,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:09,016 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,SelfDestructingSolverStorable13 [2021-08-21 17:58:09,017 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash 396168466, now seen corresponding path program 7 times [2021-08-21 17:58:09,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:09,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171752589] [2021-08-21 17:58:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:09,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:09,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:09,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171752589] [2021-08-21 17:58:09,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171752589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:09,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259497809] [2021-08-21 17:58:09,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:58:09,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:09,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:09,372 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) [2021-08-21 17:58:09,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 17:58:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:09,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 17:58:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:10,190 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 17:58:10,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-21 17:58:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:10,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259497809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:10,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:10,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2021-08-21 17:58:10,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133353925] [2021-08-21 17:58:10,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:58:10,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:10,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:58:10,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:58:10,297 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-08-21 17:58:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:10,905 INFO L93 Difference]: Finished difference Result 86 states and 130 transitions. [2021-08-21 17:58:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:58:10,905 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 24 [2021-08-21 17:58:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:10,906 INFO L225 Difference]: With dead ends: 86 [2021-08-21 17:58:10,906 INFO L226 Difference]: Without dead ends: 80 [2021-08-21 17:58:10,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:58:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-21 17:58:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2021-08-21 17:58:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2021-08-21 17:58:10,909 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 24 [2021-08-21 17:58:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:10,909 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2021-08-21 17:58:10,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-08-21 17:58:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2021-08-21 17:58:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:58:10,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:10,910 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:10,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:11,113 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,SelfDestructingSolverStorable14 [2021-08-21 17:58:11,114 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:11,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:11,114 INFO L82 PathProgramCache]: Analyzing trace with hash -534753221, now seen corresponding path program 2 times [2021-08-21 17:58:11,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:11,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706381329] [2021-08-21 17:58:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:11,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:11,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:11,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706381329] [2021-08-21 17:58:11,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706381329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:11,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932147790] [2021-08-21 17:58:11,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:11,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:11,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:11,402 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) [2021-08-21 17:58:11,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 17:58:11,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:11,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:11,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 17:58:11,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:12,351 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-21 17:58:12,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-21 17:58:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:12,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932147790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:12,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:12,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2021-08-21 17:58:12,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509846435] [2021-08-21 17:58:12,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:58:12,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:58:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:58:12,457 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:13,366 INFO L93 Difference]: Finished difference Result 89 states and 131 transitions. [2021-08-21 17:58:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:58:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:58:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:13,367 INFO L225 Difference]: With dead ends: 89 [2021-08-21 17:58:13,367 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 17:58:13,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 934.8ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:58:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 17:58:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2021-08-21 17:58:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2021-08-21 17:58:13,370 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 24 [2021-08-21 17:58:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:13,370 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2021-08-21 17:58:13,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2021-08-21 17:58:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:58:13,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:13,371 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:13,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:13,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:13,584 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:13,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:13,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1204362491, now seen corresponding path program 5 times [2021-08-21 17:58:13,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:13,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111121850] [2021-08-21 17:58:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:13,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:13,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:13,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111121850] [2021-08-21 17:58:13,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111121850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:13,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716388876] [2021-08-21 17:58:13,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:58:13,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:13,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:13,643 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) [2021-08-21 17:58:13,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 17:58:14,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:58:14,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:14,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:58:14,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:14,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716388876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:14,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:14,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 17:58:14,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463330325] [2021-08-21 17:58:14,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:58:14,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:14,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:58:14,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:58:14,192 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-08-21 17:58:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:14,262 INFO L93 Difference]: Finished difference Result 70 states and 104 transitions. [2021-08-21 17:58:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:58:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 26 [2021-08-21 17:58:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:14,263 INFO L225 Difference]: With dead ends: 70 [2021-08-21 17:58:14,263 INFO L226 Difference]: Without dead ends: 70 [2021-08-21 17:58:14,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:58:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-21 17:58:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2021-08-21 17:58:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.588235294117647) internal successors, (81), 51 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 81 transitions. [2021-08-21 17:58:14,265 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 81 transitions. Word has length 26 [2021-08-21 17:58:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:14,266 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 81 transitions. [2021-08-21 17:58:14,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-08-21 17:58:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 81 transitions. [2021-08-21 17:58:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:58:14,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:14,266 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:14,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:14,480 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,SelfDestructingSolverStorable16 [2021-08-21 17:58:14,481 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1327398683, now seen corresponding path program 6 times [2021-08-21 17:58:14,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:14,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215321579] [2021-08-21 17:58:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:14,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:14,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:14,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215321579] [2021-08-21 17:58:14,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215321579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:14,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662843873] [2021-08-21 17:58:14,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:58:14,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:14,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:14,548 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) [2021-08-21 17:58:14,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 17:58:15,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:58:15,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:15,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:58:15,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:15,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662843873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:15,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:15,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 17:58:15,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340689536] [2021-08-21 17:58:15,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:58:15,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:58:15,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:58:15,171 INFO L87 Difference]: Start difference. First operand 52 states and 81 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-08-21 17:58:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:15,240 INFO L93 Difference]: Finished difference Result 64 states and 94 transitions. [2021-08-21 17:58:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:58:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 26 [2021-08-21 17:58:15,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:15,241 INFO L225 Difference]: With dead ends: 64 [2021-08-21 17:58:15,241 INFO L226 Difference]: Without dead ends: 46 [2021-08-21 17:58:15,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:58:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-21 17:58:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-08-21 17:58:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.55) internal successors, (62), 40 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) [2021-08-21 17:58:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 62 transitions. [2021-08-21 17:58:15,244 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 62 transitions. Word has length 26 [2021-08-21 17:58:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:15,245 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 62 transitions. [2021-08-21 17:58:15,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-08-21 17:58:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 62 transitions. [2021-08-21 17:58:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:15,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:15,246 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:15,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:15,470 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,SelfDestructingSolverStorable17 [2021-08-21 17:58:15,470 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:15,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:15,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1699670307, now seen corresponding path program 7 times [2021-08-21 17:58:15,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:15,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131209166] [2021-08-21 17:58:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:15,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:15,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:15,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131209166] [2021-08-21 17:58:15,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131209166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:15,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966998754] [2021-08-21 17:58:15,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:58:15,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:15,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:15,882 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) [2021-08-21 17:58:15,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 17:58:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:16,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:58:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:16,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:58:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:16,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966998754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:16,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:16,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:58:16,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978741929] [2021-08-21 17:58:16,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:58:16,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:16,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:58:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:58:16,852 INFO L87 Difference]: Start difference. First operand 41 states and 62 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:58:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:18,789 INFO L93 Difference]: Finished difference Result 188 states and 270 transitions. [2021-08-21 17:58:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 17:58:18,789 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:58:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:18,790 INFO L225 Difference]: With dead ends: 188 [2021-08-21 17:58:18,790 INFO L226 Difference]: Without dead ends: 170 [2021-08-21 17:58:18,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1870.6ms TimeCoverageRelationStatistics Valid=554, Invalid=3228, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:58:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-21 17:58:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 60. [2021-08-21 17:58:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 59 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 101 transitions. [2021-08-21 17:58:18,794 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 101 transitions. Word has length 28 [2021-08-21 17:58:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:18,794 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 101 transitions. [2021-08-21 17:58:18,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:58:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 101 transitions. [2021-08-21 17:58:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:18,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:18,794 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:18,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:19,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:19,009 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash 495861186, now seen corresponding path program 8 times [2021-08-21 17:58:19,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:19,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656998784] [2021-08-21 17:58:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:19,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:19,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:19,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656998784] [2021-08-21 17:58:19,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656998784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:19,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687078237] [2021-08-21 17:58:19,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:19,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:19,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:19,408 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) [2021-08-21 17:58:19,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 17:58:19,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:19,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:19,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:58:19,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:20,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:20,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:20,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:58:20,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 69 [2021-08-21 17:58:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:20,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687078237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:20,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:20,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 17:58:20,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51003713] [2021-08-21 17:58:20,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:58:20,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:20,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:58:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:58:20,623 INFO L87 Difference]: Start difference. First operand 60 states and 101 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:58:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:22,463 INFO L93 Difference]: Finished difference Result 213 states and 328 transitions. [2021-08-21 17:58:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 17:58:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 17:58:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:22,465 INFO L225 Difference]: With dead ends: 213 [2021-08-21 17:58:22,465 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 17:58:22,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1791.4ms TimeCoverageRelationStatistics Valid=488, Invalid=3294, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:58:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 17:58:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 80. [2021-08-21 17:58:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.860759493670886) internal successors, (147), 79 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 147 transitions. [2021-08-21 17:58:22,469 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 147 transitions. Word has length 28 [2021-08-21 17:58:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:22,469 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 147 transitions. [2021-08-21 17:58:22,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:58:22,469 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 147 transitions. [2021-08-21 17:58:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:22,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:22,470 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:22,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:22,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:22,677 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:22,677 INFO L82 PathProgramCache]: Analyzing trace with hash 272671226, now seen corresponding path program 9 times [2021-08-21 17:58:22,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:22,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839927130] [2021-08-21 17:58:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:22,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:23,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:23,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839927130] [2021-08-21 17:58:23,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839927130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:23,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799974230] [2021-08-21 17:58:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:23,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:23,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:23,103 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) [2021-08-21 17:58:23,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 17:58:23,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:58:23,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:23,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 17:58:23,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:24,543 INFO L354 Elim1Store]: treesize reduction 16, result has 80.2 percent of original size [2021-08-21 17:58:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 98 [2021-08-21 17:58:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:27,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799974230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:27,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:27,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 17:58:27,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975553096] [2021-08-21 17:58:27,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:58:27,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:58:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:58:27,459 INFO L87 Difference]: Start difference. First operand 80 states and 147 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:58:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:30,321 INFO L93 Difference]: Finished difference Result 198 states and 311 transitions. [2021-08-21 17:58:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 17:58:30,321 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 17:58:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:30,323 INFO L225 Difference]: With dead ends: 198 [2021-08-21 17:58:30,323 INFO L226 Difference]: Without dead ends: 180 [2021-08-21 17:58:30,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2861.9ms TimeCoverageRelationStatistics Valid=522, Invalid=4034, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 17:58:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-21 17:58:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 90. [2021-08-21 17:58:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 89 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 171 transitions. [2021-08-21 17:58:30,328 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 171 transitions. Word has length 28 [2021-08-21 17:58:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:30,328 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 171 transitions. [2021-08-21 17:58:30,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:58:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 171 transitions. [2021-08-21 17:58:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:30,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:30,329 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:30,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 17:58:30,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:30,537 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash -81120936, now seen corresponding path program 10 times [2021-08-21 17:58:30,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:30,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101351072] [2021-08-21 17:58:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:30,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:30,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:30,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101351072] [2021-08-21 17:58:30,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101351072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:30,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679653710] [2021-08-21 17:58:30,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:58:30,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:30,936 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) [2021-08-21 17:58:30,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 17:58:31,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:58:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:31,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:58:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:31,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:58:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:31,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679653710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:31,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:31,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:58:31,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623453468] [2021-08-21 17:58:31,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:58:31,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:31,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:58:31,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:58:31,983 INFO L87 Difference]: Start difference. First operand 90 states and 171 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:58:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:34,845 INFO L93 Difference]: Finished difference Result 253 states and 394 transitions. [2021-08-21 17:58:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 17:58:34,845 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:58:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:34,846 INFO L225 Difference]: With dead ends: 253 [2021-08-21 17:58:34,846 INFO L226 Difference]: Without dead ends: 229 [2021-08-21 17:58:34,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 2656.3ms TimeCoverageRelationStatistics Valid=658, Invalid=4892, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 17:58:34,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-21 17:58:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 105. [2021-08-21 17:58:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 104 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 205 transitions. [2021-08-21 17:58:34,852 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 205 transitions. Word has length 28 [2021-08-21 17:58:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:34,852 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 205 transitions. [2021-08-21 17:58:34,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:58:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 205 transitions. [2021-08-21 17:58:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:34,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:34,853 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:34,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:35,068 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,SelfDestructingSolverStorable21 [2021-08-21 17:58:35,069 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1541595518, now seen corresponding path program 11 times [2021-08-21 17:58:35,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:35,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881545493] [2021-08-21 17:58:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:35,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:35,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:35,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881545493] [2021-08-21 17:58:35,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881545493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:35,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234444233] [2021-08-21 17:58:35,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:58:35,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:35,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:35,489 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) [2021-08-21 17:58:35,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 17:58:36,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:58:36,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:58:36,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:36,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:58:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:36,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234444233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:36,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:36,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:58:36,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526058457] [2021-08-21 17:58:36,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:58:36,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:36,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:58:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:58:36,588 INFO L87 Difference]: Start difference. First operand 105 states and 205 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:58:39,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:39,291 INFO L93 Difference]: Finished difference Result 270 states and 432 transitions. [2021-08-21 17:58:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 17:58:39,293 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:58:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:39,294 INFO L225 Difference]: With dead ends: 270 [2021-08-21 17:58:39,294 INFO L226 Difference]: Without dead ends: 246 [2021-08-21 17:58:39,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 2681.6ms TimeCoverageRelationStatistics Valid=658, Invalid=4892, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 17:58:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-21 17:58:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 117. [2021-08-21 17:58:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0172413793103448) internal successors, (234), 116 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 234 transitions. [2021-08-21 17:58:39,300 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 234 transitions. Word has length 28 [2021-08-21 17:58:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:39,300 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 234 transitions. [2021-08-21 17:58:39,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:58:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 234 transitions. [2021-08-21 17:58:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:39,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:39,301 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:39,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 17:58:39,504 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,SelfDestructingSolverStorable22 [2021-08-21 17:58:39,505 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1895387680, now seen corresponding path program 12 times [2021-08-21 17:58:39,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:39,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098670164] [2021-08-21 17:58:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:39,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:39,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:39,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098670164] [2021-08-21 17:58:39,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098670164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:39,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565366212] [2021-08-21 17:58:39,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:58:39,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:39,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:39,927 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) [2021-08-21 17:58:39,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 17:58:40,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:58:40,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:40,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 17:58:40,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:41,082 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 17:58:41,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 24 [2021-08-21 17:58:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:41,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565366212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:41,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:41,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 17:58:41,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016222123] [2021-08-21 17:58:41,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 17:58:41,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 17:58:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:58:41,161 INFO L87 Difference]: Start difference. First operand 117 states and 234 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:58:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:43,000 INFO L93 Difference]: Finished difference Result 230 states and 388 transitions. [2021-08-21 17:58:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:58:43,000 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 28 [2021-08-21 17:58:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:43,001 INFO L225 Difference]: With dead ends: 230 [2021-08-21 17:58:43,001 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 17:58:43,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1801.7ms TimeCoverageRelationStatistics Valid=441, Invalid=3219, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 17:58:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 17:58:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 131. [2021-08-21 17:58:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 130 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 267 transitions. [2021-08-21 17:58:43,006 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 267 transitions. Word has length 28 [2021-08-21 17:58:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:43,006 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 267 transitions. [2021-08-21 17:58:43,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:58:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 267 transitions. [2021-08-21 17:58:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:43,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:43,007 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:43,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:43,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:43,217 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash 282850550, now seen corresponding path program 13 times [2021-08-21 17:58:43,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:43,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791833890] [2021-08-21 17:58:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:43,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:43,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:43,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791833890] [2021-08-21 17:58:43,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791833890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:43,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768047260] [2021-08-21 17:58:43,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:58:43,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:43,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:43,605 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) [2021-08-21 17:58:43,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 17:58:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:44,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:58:44,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:44,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:58:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:44,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768047260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:44,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:44,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:58:44,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530696831] [2021-08-21 17:58:44,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:58:44,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:44,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:58:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:58:44,684 INFO L87 Difference]: Start difference. First operand 131 states and 267 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:58:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:46,426 INFO L93 Difference]: Finished difference Result 271 states and 463 transitions. [2021-08-21 17:58:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 17:58:46,426 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:58:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:46,427 INFO L225 Difference]: With dead ends: 271 [2021-08-21 17:58:46,427 INFO L226 Difference]: Without dead ends: 253 [2021-08-21 17:58:46,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1557.3ms TimeCoverageRelationStatistics Valid=470, Invalid=3312, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:58:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-21 17:58:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 140. [2021-08-21 17:58:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.0719424460431655) internal successors, (288), 139 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 288 transitions. [2021-08-21 17:58:46,433 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 288 transitions. Word has length 28 [2021-08-21 17:58:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:46,433 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 288 transitions. [2021-08-21 17:58:46,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:58:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 288 transitions. [2021-08-21 17:58:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:46,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:46,434 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:46,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:46,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:46,649 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash -979693089, now seen corresponding path program 14 times [2021-08-21 17:58:46,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:46,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804061484] [2021-08-21 17:58:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:46,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:47,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:47,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804061484] [2021-08-21 17:58:47,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804061484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:47,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102851426] [2021-08-21 17:58:47,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:47,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:47,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:47,079 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) [2021-08-21 17:58:47,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 17:58:47,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:47,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:47,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:58:47,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:48,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:48,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:48,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:48,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:48,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:48,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:58:48,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 69 [2021-08-21 17:58:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:48,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102851426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:48,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:48,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 17:58:48,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032979147] [2021-08-21 17:58:48,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:58:48,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:58:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:58:48,388 INFO L87 Difference]: Start difference. First operand 140 states and 288 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:58:50,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:50,542 INFO L93 Difference]: Finished difference Result 289 states and 506 transitions. [2021-08-21 17:58:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:58:50,542 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 17:58:50,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:50,544 INFO L225 Difference]: With dead ends: 289 [2021-08-21 17:58:50,544 INFO L226 Difference]: Without dead ends: 271 [2021-08-21 17:58:50,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2100.6ms TimeCoverageRelationStatistics Valid=572, Invalid=3210, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:58:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-21 17:58:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 158. [2021-08-21 17:58:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.127388535031847) internal successors, (334), 157 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 334 transitions. [2021-08-21 17:58:50,549 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 334 transitions. Word has length 28 [2021-08-21 17:58:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:50,549 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 334 transitions. [2021-08-21 17:58:50,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:58:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 334 transitions. [2021-08-21 17:58:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:50,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:50,550 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:50,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 17:58:50,764 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,SelfDestructingSolverStorable25 [2021-08-21 17:58:50,765 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1278782278, now seen corresponding path program 15 times [2021-08-21 17:58:50,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:50,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229206863] [2021-08-21 17:58:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:50,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:51,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:51,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229206863] [2021-08-21 17:58:51,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229206863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:51,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457915094] [2021-08-21 17:58:51,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:51,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:51,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:51,187 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) [2021-08-21 17:58:51,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 17:58:51,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:58:51,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:51,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:58:51,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:52,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:52,524 INFO L354 Elim1Store]: treesize reduction 28, result has 67.8 percent of original size [2021-08-21 17:58:52,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 81 [2021-08-21 17:58:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:53,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457915094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:53,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:53,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 17:58:53,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611706543] [2021-08-21 17:58:53,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:58:53,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:58:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:58:53,112 INFO L87 Difference]: Start difference. First operand 158 states and 334 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:58:56,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:56,584 INFO L93 Difference]: Finished difference Result 316 states and 546 transitions. [2021-08-21 17:58:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 17:58:56,585 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 17:58:56,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:56,586 INFO L225 Difference]: With dead ends: 316 [2021-08-21 17:58:56,586 INFO L226 Difference]: Without dead ends: 292 [2021-08-21 17:58:56,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 3418.6ms TimeCoverageRelationStatistics Valid=714, Invalid=5606, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 17:58:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-21 17:58:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 159. [2021-08-21 17:58:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1265822784810124) internal successors, (336), 158 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 336 transitions. [2021-08-21 17:58:56,593 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 336 transitions. Word has length 28 [2021-08-21 17:58:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:56,593 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 336 transitions. [2021-08-21 17:58:56,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:58:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 336 transitions. [2021-08-21 17:58:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:58:56,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:56,594 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:56,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:56,808 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,SelfDestructingSolverStorable26 [2021-08-21 17:58:56,809 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:58:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1632574440, now seen corresponding path program 16 times [2021-08-21 17:58:56,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:56,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125156205] [2021-08-21 17:58:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:56,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:57,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:57,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125156205] [2021-08-21 17:58:57,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125156205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:57,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217401451] [2021-08-21 17:58:57,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:58:57,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:57,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:57,253 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) [2021-08-21 17:58:57,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 17:58:57,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:58:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:58:57,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:58,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:58:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:58,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217401451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:58,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:58,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:58:58,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751260997] [2021-08-21 17:58:58,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:58:58,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:58,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:58:58,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:58:58,456 INFO L87 Difference]: Start difference. First operand 159 states and 336 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:00,314 INFO L93 Difference]: Finished difference Result 279 states and 505 transitions. [2021-08-21 17:59:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:59:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:59:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:00,315 INFO L225 Difference]: With dead ends: 279 [2021-08-21 17:59:00,315 INFO L226 Difference]: Without dead ends: 261 [2021-08-21 17:59:00,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1756.4ms TimeCoverageRelationStatistics Valid=446, Invalid=3336, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:59:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-21 17:59:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 163. [2021-08-21 17:59:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.123456790123457) internal successors, (344), 162 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 344 transitions. [2021-08-21 17:59:00,320 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 344 transitions. Word has length 28 [2021-08-21 17:59:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:00,321 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 344 transitions. [2021-08-21 17:59:00,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 344 transitions. [2021-08-21 17:59:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:00,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:00,321 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:00,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:00,545 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,SelfDestructingSolverStorable27 [2021-08-21 17:59:00,546 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:00,546 INFO L82 PathProgramCache]: Analyzing trace with hash 545663790, now seen corresponding path program 17 times [2021-08-21 17:59:00,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:00,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789178504] [2021-08-21 17:59:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:00,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:00,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:00,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789178504] [2021-08-21 17:59:00,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789178504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:00,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446093055] [2021-08-21 17:59:00,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:00,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:00,955 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) [2021-08-21 17:59:00,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 17:59:01,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:59:01,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:01,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:02,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:59:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:02,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446093055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:02,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:02,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:59:02,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352262940] [2021-08-21 17:59:02,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:59:02,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:59:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:59:02,188 INFO L87 Difference]: Start difference. First operand 163 states and 344 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:03,742 INFO L93 Difference]: Finished difference Result 303 states and 540 transitions. [2021-08-21 17:59:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:59:03,743 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:59:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:03,744 INFO L225 Difference]: With dead ends: 303 [2021-08-21 17:59:03,744 INFO L226 Difference]: Without dead ends: 285 [2021-08-21 17:59:03,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1553.1ms TimeCoverageRelationStatistics Valid=472, Invalid=3310, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:59:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-08-21 17:59:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 167. [2021-08-21 17:59:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-08-21 17:59:03,749 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 28 [2021-08-21 17:59:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:03,749 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-08-21 17:59:03,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-08-21 17:59:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:03,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:03,750 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:03,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:03,968 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,SelfDestructingSolverStorable28 [2021-08-21 17:59:03,969 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash -716879849, now seen corresponding path program 18 times [2021-08-21 17:59:03,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:03,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881124370] [2021-08-21 17:59:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:03,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:04,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:04,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881124370] [2021-08-21 17:59:04,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881124370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:04,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872013675] [2021-08-21 17:59:04,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:59:04,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:04,368 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) [2021-08-21 17:59:04,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 17:59:05,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:59:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 17:59:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:05,857 INFO L354 Elim1Store]: treesize reduction 16, result has 80.2 percent of original size [2021-08-21 17:59:05,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 98 [2021-08-21 17:59:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:07,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872013675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:07,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:07,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 17:59:07,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125591109] [2021-08-21 17:59:07,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:59:07,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:59:07,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:59:07,174 INFO L87 Difference]: Start difference. First operand 167 states and 352 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:59:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:09,973 INFO L93 Difference]: Finished difference Result 317 states and 572 transitions. [2021-08-21 17:59:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:59:09,973 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 17:59:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:09,975 INFO L225 Difference]: With dead ends: 317 [2021-08-21 17:59:09,975 INFO L226 Difference]: Without dead ends: 299 [2021-08-21 17:59:09,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 2691.0ms TimeCoverageRelationStatistics Valid=630, Invalid=3926, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 17:59:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-08-21 17:59:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2021-08-21 17:59:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1226993865030677) internal successors, (346), 163 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 346 transitions. [2021-08-21 17:59:09,980 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 346 transitions. Word has length 28 [2021-08-21 17:59:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:09,980 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 346 transitions. [2021-08-21 17:59:09,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:59:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 346 transitions. [2021-08-21 17:59:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:09,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:09,981 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:10,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:10,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:10,201 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:10,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:10,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1888778092, now seen corresponding path program 19 times [2021-08-21 17:59:10,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:10,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315989017] [2021-08-21 17:59:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:10,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:10,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:10,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315989017] [2021-08-21 17:59:10,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315989017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:10,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250615536] [2021-08-21 17:59:10,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:59:10,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:10,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:10,567 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) [2021-08-21 17:59:10,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 17:59:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:11,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:11,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:59:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:11,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250615536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:11,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:11,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:59:11,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045382453] [2021-08-21 17:59:11,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:59:11,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:59:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:59:11,841 INFO L87 Difference]: Start difference. First operand 164 states and 346 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:13,260 INFO L93 Difference]: Finished difference Result 283 states and 513 transitions. [2021-08-21 17:59:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:59:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:59:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:13,261 INFO L225 Difference]: With dead ends: 283 [2021-08-21 17:59:13,261 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 17:59:13,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1406.7ms TimeCoverageRelationStatistics Valid=448, Invalid=2974, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:59:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 17:59:13,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 174. [2021-08-21 17:59:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.138728323699422) internal successors, (370), 173 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 370 transitions. [2021-08-21 17:59:13,266 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 370 transitions. Word has length 28 [2021-08-21 17:59:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:13,266 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 370 transitions. [2021-08-21 17:59:13,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 370 transitions. [2021-08-21 17:59:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:13,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:13,267 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:13,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 17:59:13,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:13,477 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:13,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1143645565, now seen corresponding path program 20 times [2021-08-21 17:59:13,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:13,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164826267] [2021-08-21 17:59:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:13,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:13,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:13,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164826267] [2021-08-21 17:59:13,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164826267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:13,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662897877] [2021-08-21 17:59:13,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:59:13,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:13,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:13,899 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) [2021-08-21 17:59:13,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 17:59:14,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:59:14,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:14,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:15,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:59:15,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 69 [2021-08-21 17:59:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:15,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662897877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:15,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:15,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 17:59:15,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659302981] [2021-08-21 17:59:15,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:59:15,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:59:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:59:15,524 INFO L87 Difference]: Start difference. First operand 174 states and 370 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:59:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:17,098 INFO L93 Difference]: Finished difference Result 288 states and 527 transitions. [2021-08-21 17:59:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:59:17,099 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 17:59:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:17,100 INFO L225 Difference]: With dead ends: 288 [2021-08-21 17:59:17,100 INFO L226 Difference]: Without dead ends: 270 [2021-08-21 17:59:17,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1718.5ms TimeCoverageRelationStatistics Valid=479, Invalid=3061, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 17:59:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-08-21 17:59:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 184. [2021-08-21 17:59:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1530054644808745) internal successors, (394), 183 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 394 transitions. [2021-08-21 17:59:17,105 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 394 transitions. Word has length 28 [2021-08-21 17:59:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:17,105 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 394 transitions. [2021-08-21 17:59:17,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:59:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 394 transitions. [2021-08-21 17:59:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:17,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:17,106 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:17,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:17,320 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,SelfDestructingSolverStorable31 [2021-08-21 17:59:17,321 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:17,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2014940857, now seen corresponding path program 21 times [2021-08-21 17:59:17,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:17,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062095316] [2021-08-21 17:59:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:17,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:17,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:17,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062095316] [2021-08-21 17:59:17,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062095316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:17,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513088552] [2021-08-21 17:59:17,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:59:17,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:17,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:17,754 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) [2021-08-21 17:59:17,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 17:59:18,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:59:18,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:18,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:19,223 INFO L354 Elim1Store]: treesize reduction 28, result has 67.8 percent of original size [2021-08-21 17:59:19,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 81 [2021-08-21 17:59:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:19,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513088552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:19,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:19,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 17:59:19,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611738894] [2021-08-21 17:59:19,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:59:19,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:19,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:59:19,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:59:19,833 INFO L87 Difference]: Start difference. First operand 184 states and 394 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:59:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:22,092 INFO L93 Difference]: Finished difference Result 271 states and 509 transitions. [2021-08-21 17:59:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:59:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 17:59:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:22,093 INFO L225 Difference]: With dead ends: 271 [2021-08-21 17:59:22,093 INFO L226 Difference]: Without dead ends: 253 [2021-08-21 17:59:22,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 2293.4ms TimeCoverageRelationStatistics Valid=488, Invalid=3802, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 17:59:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-21 17:59:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 190. [2021-08-21 17:59:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1587301587301586) internal successors, (408), 189 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 408 transitions. [2021-08-21 17:59:22,098 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 408 transitions. Word has length 28 [2021-08-21 17:59:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:22,098 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 408 transitions. [2021-08-21 17:59:22,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:59:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 408 transitions. [2021-08-21 17:59:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:22,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:22,099 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:22,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:22,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:22,313 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1661148695, now seen corresponding path program 22 times [2021-08-21 17:59:22,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:22,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323946506] [2021-08-21 17:59:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:22,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:22,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:22,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323946506] [2021-08-21 17:59:22,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323946506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:22,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940312276] [2021-08-21 17:59:22,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:59:22,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:22,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:22,723 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) [2021-08-21 17:59:22,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 17:59:23,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:59:23,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:24,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:59:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:24,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940312276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:24,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:24,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:59:24,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689733511] [2021-08-21 17:59:24,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:59:24,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:59:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:59:24,114 INFO L87 Difference]: Start difference. First operand 190 states and 408 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:25,884 INFO L93 Difference]: Finished difference Result 284 states and 538 transitions. [2021-08-21 17:59:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 17:59:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:59:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:25,885 INFO L225 Difference]: With dead ends: 284 [2021-08-21 17:59:25,885 INFO L226 Difference]: Without dead ends: 266 [2021-08-21 17:59:25,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1766.7ms TimeCoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:59:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-08-21 17:59:25,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 194. [2021-08-21 17:59:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1658031088082903) internal successors, (418), 193 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 418 transitions. [2021-08-21 17:59:25,890 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 418 transitions. Word has length 28 [2021-08-21 17:59:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:25,890 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 418 transitions. [2021-08-21 17:59:25,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 418 transitions. [2021-08-21 17:59:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:25,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:25,891 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:25,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 17:59:26,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:26,093 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1032401086, now seen corresponding path program 23 times [2021-08-21 17:59:26,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:26,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582161000] [2021-08-21 17:59:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:26,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:26,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:26,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582161000] [2021-08-21 17:59:26,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582161000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:26,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507961236] [2021-08-21 17:59:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:26,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:26,488 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) [2021-08-21 17:59:26,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 17:59:27,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:59:27,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:27,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:27,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:27,949 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-21 17:59:27,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 37 treesize of output 30 [2021-08-21 17:59:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:28,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507961236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:28,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:28,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 17:59:28,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029974378] [2021-08-21 17:59:28,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 17:59:28,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:28,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 17:59:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:59:28,033 INFO L87 Difference]: Start difference. First operand 194 states and 418 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:59:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:30,206 INFO L93 Difference]: Finished difference Result 328 states and 605 transitions. [2021-08-21 17:59:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 17:59:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 28 [2021-08-21 17:59:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:30,207 INFO L225 Difference]: With dead ends: 328 [2021-08-21 17:59:30,207 INFO L226 Difference]: Without dead ends: 304 [2021-08-21 17:59:30,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2152.2ms TimeCoverageRelationStatistics Valid=587, Invalid=4105, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 17:59:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-21 17:59:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 207. [2021-08-21 17:59:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.1893203883495147) internal successors, (451), 206 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 451 transitions. [2021-08-21 17:59:30,212 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 451 transitions. Word has length 28 [2021-08-21 17:59:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:30,212 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 451 transitions. [2021-08-21 17:59:30,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:59:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 451 transitions. [2021-08-21 17:59:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:30,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:30,213 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:30,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 17:59:30,428 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,SelfDestructingSolverStorable34 [2021-08-21 17:59:30,429 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1386193248, now seen corresponding path program 24 times [2021-08-21 17:59:30,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:30,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022166434] [2021-08-21 17:59:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:30,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:30,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:30,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022166434] [2021-08-21 17:59:30,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022166434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:30,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246351102] [2021-08-21 17:59:30,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:59:30,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:30,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:30,837 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) [2021-08-21 17:59:30,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 17:59:31,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:59:31,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:32,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:32,385 INFO L354 Elim1Store]: treesize reduction 28, result has 67.8 percent of original size [2021-08-21 17:59:32,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 81 [2021-08-21 17:59:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:32,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246351102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:32,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:32,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 17:59:32,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352344743] [2021-08-21 17:59:32,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:59:32,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:59:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:59:32,844 INFO L87 Difference]: Start difference. First operand 207 states and 451 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:59:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:34,774 INFO L93 Difference]: Finished difference Result 269 states and 536 transitions. [2021-08-21 17:59:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:59:34,774 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 17:59:34,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:34,775 INFO L225 Difference]: With dead ends: 269 [2021-08-21 17:59:34,775 INFO L226 Difference]: Without dead ends: 257 [2021-08-21 17:59:34,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1923.8ms TimeCoverageRelationStatistics Valid=372, Invalid=2934, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:59:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-21 17:59:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 212. [2021-08-21 17:59:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.199052132701422) internal successors, (464), 211 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 464 transitions. [2021-08-21 17:59:34,780 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 464 transitions. Word has length 28 [2021-08-21 17:59:34,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:34,780 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 464 transitions. [2021-08-21 17:59:34,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 17:59:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 464 transitions. [2021-08-21 17:59:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:34,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:34,781 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:34,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 17:59:34,996 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,SelfDestructingSolverStorable35 [2021-08-21 17:59:34,997 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash 792044982, now seen corresponding path program 25 times [2021-08-21 17:59:34,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:34,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680831230] [2021-08-21 17:59:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:34,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:35,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:35,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680831230] [2021-08-21 17:59:35,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680831230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:35,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133192003] [2021-08-21 17:59:35,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:59:35,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:35,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:35,443 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) [2021-08-21 17:59:35,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 17:59:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:36,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:36,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:36,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:59:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:36,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133192003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:36,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:36,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:59:36,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350929303] [2021-08-21 17:59:36,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:59:36,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:36,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:59:36,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:59:36,890 INFO L87 Difference]: Start difference. First operand 212 states and 464 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:38,398 INFO L93 Difference]: Finished difference Result 330 states and 629 transitions. [2021-08-21 17:59:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:59:38,399 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:59:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:38,400 INFO L225 Difference]: With dead ends: 330 [2021-08-21 17:59:38,400 INFO L226 Difference]: Without dead ends: 312 [2021-08-21 17:59:38,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1449.7ms TimeCoverageRelationStatistics Valid=448, Invalid=2974, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:59:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-21 17:59:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 214. [2021-08-21 17:59:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.1971830985915495) internal successors, (468), 213 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 468 transitions. [2021-08-21 17:59:38,405 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 468 transitions. Word has length 28 [2021-08-21 17:59:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:38,405 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 468 transitions. [2021-08-21 17:59:38,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:38,405 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 468 transitions. [2021-08-21 17:59:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:38,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:38,406 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:38,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:38,612 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,SelfDestructingSolverStorable36 [2021-08-21 17:59:38,613 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:38,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash -470498657, now seen corresponding path program 26 times [2021-08-21 17:59:38,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:38,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051409084] [2021-08-21 17:59:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:38,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:38,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:38,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051409084] [2021-08-21 17:59:38,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051409084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:38,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77791593] [2021-08-21 17:59:38,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:59:38,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:38,976 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) [2021-08-21 17:59:38,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 17:59:39,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:59:40,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:40,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 17:59:40,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:40,511 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 17:59:40,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 24 [2021-08-21 17:59:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:40,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77791593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:40,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:40,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 17:59:40,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069341892] [2021-08-21 17:59:40,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 17:59:40,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 17:59:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:59:40,590 INFO L87 Difference]: Start difference. First operand 214 states and 468 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:59:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:42,215 INFO L93 Difference]: Finished difference Result 335 states and 640 transitions. [2021-08-21 17:59:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:59:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 28 [2021-08-21 17:59:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:42,216 INFO L225 Difference]: With dead ends: 335 [2021-08-21 17:59:42,216 INFO L226 Difference]: Without dead ends: 317 [2021-08-21 17:59:42,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1555.0ms TimeCoverageRelationStatistics Valid=466, Invalid=3074, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 17:59:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-21 17:59:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 214. [2021-08-21 17:59:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2018779342723005) internal successors, (469), 213 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 469 transitions. [2021-08-21 17:59:42,220 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 469 transitions. Word has length 28 [2021-08-21 17:59:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:42,220 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 469 transitions. [2021-08-21 17:59:42,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:59:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 469 transitions. [2021-08-21 17:59:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:42,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:42,221 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:42,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:42,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:42,422 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:42,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1642396900, now seen corresponding path program 27 times [2021-08-21 17:59:42,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:42,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620118279] [2021-08-21 17:59:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:42,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:42,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:42,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620118279] [2021-08-21 17:59:42,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620118279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:42,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712252281] [2021-08-21 17:59:42,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:59:42,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:42,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:42,792 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) [2021-08-21 17:59:42,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 17:59:43,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:59:43,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:43,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 17:59:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:44,348 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 17:59:44,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 24 [2021-08-21 17:59:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:44,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712252281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:44,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:44,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 17:59:44,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622967201] [2021-08-21 17:59:44,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 17:59:44,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:44,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 17:59:44,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:59:44,425 INFO L87 Difference]: Start difference. First operand 214 states and 469 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:59:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:46,515 INFO L93 Difference]: Finished difference Result 348 states and 652 transitions. [2021-08-21 17:59:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:59:46,515 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 28 [2021-08-21 17:59:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:46,516 INFO L225 Difference]: With dead ends: 348 [2021-08-21 17:59:46,516 INFO L226 Difference]: Without dead ends: 330 [2021-08-21 17:59:46,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1921.6ms TimeCoverageRelationStatistics Valid=553, Invalid=3229, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:59:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-08-21 17:59:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 218. [2021-08-21 17:59:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2027649769585254) internal successors, (478), 217 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 478 transitions. [2021-08-21 17:59:46,521 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 478 transitions. Word has length 28 [2021-08-21 17:59:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:46,521 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 478 transitions. [2021-08-21 17:59:46,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:59:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 478 transitions. [2021-08-21 17:59:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:46,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:46,522 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:46,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:46,725 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,SelfDestructingSolverStorable38 [2021-08-21 17:59:46,726 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1390026757, now seen corresponding path program 28 times [2021-08-21 17:59:46,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:46,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98368956] [2021-08-21 17:59:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:46,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:47,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:47,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98368956] [2021-08-21 17:59:47,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98368956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:47,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014213241] [2021-08-21 17:59:47,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:59:47,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:47,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:47,090 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) [2021-08-21 17:59:47,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 17:59:48,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:59:48,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:48,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:48,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:48,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 17:59:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:48,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014213241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:48,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:48,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 17:59:48,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245379716] [2021-08-21 17:59:48,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:59:48,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:48,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:59:48,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:59:48,659 INFO L87 Difference]: Start difference. First operand 218 states and 478 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:50,249 INFO L93 Difference]: Finished difference Result 381 states and 724 transitions. [2021-08-21 17:59:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:59:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 17:59:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:50,251 INFO L225 Difference]: With dead ends: 381 [2021-08-21 17:59:50,251 INFO L226 Difference]: Without dead ends: 363 [2021-08-21 17:59:50,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1509.2ms TimeCoverageRelationStatistics Valid=472, Invalid=3310, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:59:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-21 17:59:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 221. [2021-08-21 17:59:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.209090909090909) internal successors, (486), 220 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 486 transitions. [2021-08-21 17:59:50,276 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 486 transitions. Word has length 28 [2021-08-21 17:59:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:50,276 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 486 transitions. [2021-08-21 17:59:50,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 17:59:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 486 transitions. [2021-08-21 17:59:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:50,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:50,277 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:50,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:50,505 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,SelfDestructingSolverStorable39 [2021-08-21 17:59:50,505 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:50,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2033645247, now seen corresponding path program 29 times [2021-08-21 17:59:50,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:50,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259761732] [2021-08-21 17:59:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:50,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:50,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:50,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259761732] [2021-08-21 17:59:50,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259761732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:50,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765327380] [2021-08-21 17:59:50,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:50,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:50,910 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) [2021-08-21 17:59:50,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 17:59:52,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:59:52,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:59:52,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:52,562 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-21 17:59:52,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 37 treesize of output 30 [2021-08-21 17:59:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:52,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765327380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:52,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:52,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 17:59:52,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75833910] [2021-08-21 17:59:52,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 17:59:52,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:52,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 17:59:52,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:59:52,664 INFO L87 Difference]: Start difference. First operand 221 states and 486 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:59:54,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:54,523 INFO L93 Difference]: Finished difference Result 335 states and 641 transitions. [2021-08-21 17:59:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:59:54,523 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 28 [2021-08-21 17:59:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:54,524 INFO L225 Difference]: With dead ends: 335 [2021-08-21 17:59:54,524 INFO L226 Difference]: Without dead ends: 317 [2021-08-21 17:59:54,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1838.6ms TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 17:59:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-21 17:59:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 223. [2021-08-21 17:59:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2117117117117115) internal successors, (491), 222 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 491 transitions. [2021-08-21 17:59:54,530 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 491 transitions. Word has length 28 [2021-08-21 17:59:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:54,530 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 491 transitions. [2021-08-21 17:59:54,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 17:59:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 491 transitions. [2021-08-21 17:59:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:59:54,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:54,531 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:54,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 17:59:54,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:54,745 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 17:59:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1907529887, now seen corresponding path program 30 times [2021-08-21 17:59:54,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:54,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769677200] [2021-08-21 17:59:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:54,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:55,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:55,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769677200] [2021-08-21 17:59:55,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769677200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:55,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772855531] [2021-08-21 17:59:55,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:59:55,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:55,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:55,142 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) [2021-08-21 17:59:55,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 17:59:56,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:59:56,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 17:59:56,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:56,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:57,028 INFO L354 Elim1Store]: treesize reduction 20, result has 74.7 percent of original size [2021-08-21 17:59:57,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 84 [2021-08-21 17:59:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:57,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772855531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:57,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:57,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 17:59:57,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763662019] [2021-08-21 17:59:57,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:59:57,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:57,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:59:57,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:59:57,954 INFO L87 Difference]: Start difference. First operand 223 states and 491 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 18:00:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:01,458 INFO L93 Difference]: Finished difference Result 378 states and 698 transitions. [2021-08-21 18:00:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 18:00:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 18:00:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:01,460 INFO L225 Difference]: With dead ends: 378 [2021-08-21 18:00:01,460 INFO L226 Difference]: Without dead ends: 354 [2021-08-21 18:00:01,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 3457.6ms TimeCoverageRelationStatistics Valid=730, Invalid=5590, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 18:00:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-08-21 18:00:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 223. [2021-08-21 18:00:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2117117117117115) internal successors, (491), 222 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 491 transitions. [2021-08-21 18:00:01,465 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 491 transitions. Word has length 28 [2021-08-21 18:00:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:01,465 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 491 transitions. [2021-08-21 18:00:01,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 18:00:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 491 transitions. [2021-08-21 18:00:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:00:01,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:01,466 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:01,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 18:00:01,680 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,SelfDestructingSolverStorable41 [2021-08-21 18:00:01,681 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:01,681 INFO L82 PathProgramCache]: Analyzing trace with hash -4531022, now seen corresponding path program 31 times [2021-08-21 18:00:01,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:01,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197575590] [2021-08-21 18:00:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:01,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:02,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:02,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197575590] [2021-08-21 18:00:02,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197575590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:02,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410379321] [2021-08-21 18:00:02,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:02,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:02,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:02,274 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) [2021-08-21 18:00:02,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:00:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 18:00:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:03,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 18:00:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:03,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410379321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:03,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:03,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 18:00:03,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018048111] [2021-08-21 18:00:03,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:00:03,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:00:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:00:03,957 INFO L87 Difference]: Start difference. First operand 223 states and 491 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 18:00:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:05,893 INFO L93 Difference]: Finished difference Result 362 states and 685 transitions. [2021-08-21 18:00:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:00:05,893 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 18:00:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:05,894 INFO L225 Difference]: With dead ends: 362 [2021-08-21 18:00:05,895 INFO L226 Difference]: Without dead ends: 344 [2021-08-21 18:00:05,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1930.7ms TimeCoverageRelationStatistics Valid=554, Invalid=3228, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:00:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-21 18:00:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 226. [2021-08-21 18:00:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2088888888888887) internal successors, (497), 225 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 497 transitions. [2021-08-21 18:00:05,900 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 497 transitions. Word has length 28 [2021-08-21 18:00:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:05,900 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 497 transitions. [2021-08-21 18:00:05,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 18:00:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 497 transitions. [2021-08-21 18:00:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:00:05,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:05,901 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:05,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:06,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:06,109 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1267074661, now seen corresponding path program 32 times [2021-08-21 18:00:06,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:06,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020862380] [2021-08-21 18:00:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:06,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:06,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:06,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020862380] [2021-08-21 18:00:06,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020862380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:06,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132316672] [2021-08-21 18:00:06,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:06,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:06,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:06,504 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) [2021-08-21 18:00:06,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:00:07,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:07,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:07,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:00:07,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:08,478 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 18:00:08,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 24 [2021-08-21 18:00:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:08,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132316672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:08,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:08,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 18:00:08,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145513161] [2021-08-21 18:00:08,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:00:08,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:00:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:00:08,557 INFO L87 Difference]: Start difference. First operand 226 states and 497 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 18:00:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:10,460 INFO L93 Difference]: Finished difference Result 385 states and 737 transitions. [2021-08-21 18:00:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:00:10,460 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 28 [2021-08-21 18:00:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:10,461 INFO L225 Difference]: With dead ends: 385 [2021-08-21 18:00:10,461 INFO L226 Difference]: Without dead ends: 367 [2021-08-21 18:00:10,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1834.0ms TimeCoverageRelationStatistics Valid=469, Invalid=3313, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:00:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-08-21 18:00:10,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 224. [2021-08-21 18:00:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.210762331838565) internal successors, (493), 223 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 493 transitions. [2021-08-21 18:00:10,466 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 493 transitions. Word has length 28 [2021-08-21 18:00:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:10,467 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 493 transitions. [2021-08-21 18:00:10,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 18:00:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 493 transitions. [2021-08-21 18:00:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:00:10,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:10,467 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:10,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 18:00:10,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:10,673 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash -395779369, now seen corresponding path program 33 times [2021-08-21 18:00:10,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:10,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987340854] [2021-08-21 18:00:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:10,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:11,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:11,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987340854] [2021-08-21 18:00:11,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987340854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:11,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162940333] [2021-08-21 18:00:11,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:11,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:11,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:11,151 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) [2021-08-21 18:00:11,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:00:12,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:00:12,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:12,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:00:12,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:13,070 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 18:00:13,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 24 [2021-08-21 18:00:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:13,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162940333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:13,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:13,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 18:00:13,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358014868] [2021-08-21 18:00:13,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:00:13,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:00:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:00:13,171 INFO L87 Difference]: Start difference. First operand 224 states and 493 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 18:00:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:15,030 INFO L93 Difference]: Finished difference Result 340 states and 653 transitions. [2021-08-21 18:00:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:00:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 28 [2021-08-21 18:00:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:15,031 INFO L225 Difference]: With dead ends: 340 [2021-08-21 18:00:15,031 INFO L226 Difference]: Without dead ends: 322 [2021-08-21 18:00:15,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1941.3ms TimeCoverageRelationStatistics Valid=441, Invalid=3219, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:00:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-21 18:00:15,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 227. [2021-08-21 18:00:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2168141592920354) internal successors, (501), 226 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 501 transitions. [2021-08-21 18:00:15,036 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 501 transitions. Word has length 28 [2021-08-21 18:00:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:15,037 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 501 transitions. [2021-08-21 18:00:15,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 18:00:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 501 transitions. [2021-08-21 18:00:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:00:15,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:15,037 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:15,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:15,257 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,SelfDestructingSolverStorable44 [2021-08-21 18:00:15,257 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash -749571531, now seen corresponding path program 34 times [2021-08-21 18:00:15,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:15,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164927494] [2021-08-21 18:00:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:15,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:15,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:15,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164927494] [2021-08-21 18:00:15,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164927494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:15,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867778485] [2021-08-21 18:00:15,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:15,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:15,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:15,670 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) [2021-08-21 18:00:15,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:00:16,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:16,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:16,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 18:00:16,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:17,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 18:00:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:17,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867778485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:17,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:17,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 18:00:17,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644562829] [2021-08-21 18:00:17,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:00:17,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:00:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:00:17,492 INFO L87 Difference]: Start difference. First operand 227 states and 501 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 18:00:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:20,354 INFO L93 Difference]: Finished difference Result 388 states and 720 transitions. [2021-08-21 18:00:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 18:00:20,355 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 18:00:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:20,356 INFO L225 Difference]: With dead ends: 388 [2021-08-21 18:00:20,356 INFO L226 Difference]: Without dead ends: 364 [2021-08-21 18:00:20,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 2756.3ms TimeCoverageRelationStatistics Valid=658, Invalid=4892, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:00:20,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-21 18:00:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 227. [2021-08-21 18:00:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2168141592920354) internal successors, (501), 226 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 501 transitions. [2021-08-21 18:00:20,361 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 501 transitions. Word has length 28 [2021-08-21 18:00:20,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:20,362 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 501 transitions. [2021-08-21 18:00:20,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 18:00:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 501 transitions. [2021-08-21 18:00:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:00:20,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:20,363 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:20,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:20,580 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,SelfDestructingSolverStorable45 [2021-08-21 18:00:20,580 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2084921183, now seen corresponding path program 35 times [2021-08-21 18:00:20,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:20,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44817462] [2021-08-21 18:00:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:20,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:21,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:21,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44817462] [2021-08-21 18:00:21,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44817462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:21,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494806054] [2021-08-21 18:00:21,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:21,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:21,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:21,017 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) [2021-08-21 18:00:21,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:00:22,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:00:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:22,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 18:00:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:22,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 18:00:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:22,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494806054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:22,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:22,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 18:00:22,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250302279] [2021-08-21 18:00:22,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:00:22,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:22,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:00:22,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:00:22,921 INFO L87 Difference]: Start difference. First operand 227 states and 501 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 18:00:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:25,678 INFO L93 Difference]: Finished difference Result 384 states and 710 transitions. [2021-08-21 18:00:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:00:25,679 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 28 [2021-08-21 18:00:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:25,680 INFO L225 Difference]: With dead ends: 384 [2021-08-21 18:00:25,680 INFO L226 Difference]: Without dead ends: 360 [2021-08-21 18:00:25,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 2679.6ms TimeCoverageRelationStatistics Valid=639, Invalid=4763, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 18:00:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-08-21 18:00:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 229. [2021-08-21 18:00:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.219298245614035) internal successors, (506), 228 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 506 transitions. [2021-08-21 18:00:25,685 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 506 transitions. Word has length 28 [2021-08-21 18:00:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:25,685 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 506 transitions. [2021-08-21 18:00:25,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 18:00:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 506 transitions. [2021-08-21 18:00:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:00:25,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:25,686 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:25,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 18:00:25,900 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,SelfDestructingSolverStorable46 [2021-08-21 18:00:25,901 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1731129021, now seen corresponding path program 36 times [2021-08-21 18:00:25,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:25,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50704811] [2021-08-21 18:00:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:25,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:26,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:26,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50704811] [2021-08-21 18:00:26,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50704811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:26,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500604863] [2021-08-21 18:00:26,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:26,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:26,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:26,308 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) [2021-08-21 18:00:26,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:00:27,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:00:27,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:27,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:00:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:28,209 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 18:00:28,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 24 [2021-08-21 18:00:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:28,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500604863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:28,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:28,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 18:00:28,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354514536] [2021-08-21 18:00:28,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:00:28,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:00:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:00:28,302 INFO L87 Difference]: Start difference. First operand 229 states and 506 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 18:00:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:30,213 INFO L93 Difference]: Finished difference Result 341 states and 658 transitions. [2021-08-21 18:00:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:00:30,214 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 28 [2021-08-21 18:00:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:30,215 INFO L225 Difference]: With dead ends: 341 [2021-08-21 18:00:30,215 INFO L226 Difference]: Without dead ends: 323 [2021-08-21 18:00:30,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1838.4ms TimeCoverageRelationStatistics Valid=441, Invalid=3219, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:00:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-08-21 18:00:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 229. [2021-08-21 18:00:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.219298245614035) internal successors, (506), 228 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 506 transitions. [2021-08-21 18:00:30,220 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 506 transitions. Word has length 28 [2021-08-21 18:00:30,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:30,220 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 506 transitions. [2021-08-21 18:00:30,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-21 18:00:30,220 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 506 transitions. [2021-08-21 18:00:30,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:00:30,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:30,221 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:30,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 18:00:30,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:30,433 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash -385600045, now seen corresponding path program 37 times [2021-08-21 18:00:30,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:30,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535675154] [2021-08-21 18:00:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:30,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:30,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:30,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535675154] [2021-08-21 18:00:30,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535675154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:30,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668574092] [2021-08-21 18:00:30,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:30,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:30,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:30,826 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) [2021-08-21 18:00:30,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:00:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:32,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 18:00:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:32,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 18:00:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:32,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668574092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:32,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:32,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-21 18:00:32,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059948639] [2021-08-21 18:00:32,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:00:32,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:00:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:00:32,675 INFO L87 Difference]: Start difference. First operand 229 states and 506 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 18:00:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:34,423 INFO L93 Difference]: Finished difference Result 371 states and 706 transitions. [2021-08-21 18:00:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:00:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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 28 [2021-08-21 18:00:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:34,424 INFO L225 Difference]: With dead ends: 371 [2021-08-21 18:00:34,424 INFO L226 Difference]: Without dead ends: 353 [2021-08-21 18:00:34,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1580.4ms TimeCoverageRelationStatistics Valid=470, Invalid=3312, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:00:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-21 18:00:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 232. [2021-08-21 18:00:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.2164502164502164) internal successors, (512), 231 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 512 transitions. [2021-08-21 18:00:34,430 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 512 transitions. Word has length 28 [2021-08-21 18:00:34,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:34,430 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 512 transitions. [2021-08-21 18:00:34,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 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) [2021-08-21 18:00:34,430 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 512 transitions. [2021-08-21 18:00:34,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:00:34,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:34,431 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:34,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:34,644 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,SelfDestructingSolverStorable48 [2021-08-21 18:00:34,645 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1648143684, now seen corresponding path program 3 times [2021-08-21 18:00:34,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:34,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131871272] [2021-08-21 18:00:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:34,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:35,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:35,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131871272] [2021-08-21 18:00:35,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131871272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:35,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754784430] [2021-08-21 18:00:35,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:35,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:35,093 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) [2021-08-21 18:00:35,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:00:36,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:00:36,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:00:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:37,267 INFO L354 Elim1Store]: treesize reduction 16, result has 80.2 percent of original size [2021-08-21 18:00:37,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 98 [2021-08-21 18:00:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:38,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754784430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:38,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:38,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 18:00:38,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486814506] [2021-08-21 18:00:38,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:00:38,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:00:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:00:38,334 INFO L87 Difference]: Start difference. First operand 232 states and 512 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 18:00:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:41,365 INFO L93 Difference]: Finished difference Result 426 states and 806 transitions. [2021-08-21 18:00:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:00:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 28 [2021-08-21 18:00:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:41,366 INFO L225 Difference]: With dead ends: 426 [2021-08-21 18:00:41,366 INFO L226 Difference]: Without dead ends: 408 [2021-08-21 18:00:41,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2846.6ms TimeCoverageRelationStatistics Valid=655, Invalid=4175, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:00:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-08-21 18:00:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 235. [2021-08-21 18:00:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.230769230769231) internal successors, (522), 234 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 522 transitions. [2021-08-21 18:00:41,371 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 522 transitions. Word has length 28 [2021-08-21 18:00:41,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:41,372 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 522 transitions. [2021-08-21 18:00:41,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2021-08-21 18:00:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 522 transitions. [2021-08-21 18:00:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:00:41,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:41,372 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:41,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:41,576 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,SelfDestructingSolverStorable49 [2021-08-21 18:00:41,577 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash -746446785, now seen corresponding path program 8 times [2021-08-21 18:00:41,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:41,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516318587] [2021-08-21 18:00:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:41,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:41,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:41,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516318587] [2021-08-21 18:00:41,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516318587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:41,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65879507] [2021-08-21 18:00:41,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:41,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:41,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:41,661 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) [2021-08-21 18:00:41,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:00:43,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:43,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:43,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:00:43,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:43,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65879507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:43,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:43,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 18:00:43,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768507522] [2021-08-21 18:00:43,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:00:43,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:43,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:00:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:00:43,372 INFO L87 Difference]: Start difference. First operand 235 states and 522 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) [2021-08-21 18:00:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:43,454 INFO L93 Difference]: Finished difference Result 288 states and 620 transitions. [2021-08-21 18:00:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:00:43,454 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 30 [2021-08-21 18:00:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:43,455 INFO L225 Difference]: With dead ends: 288 [2021-08-21 18:00:43,455 INFO L226 Difference]: Without dead ends: 276 [2021-08-21 18:00:43,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:00:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-08-21 18:00:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2021-08-21 18:00:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.148) internal successors, (537), 250 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 537 transitions. [2021-08-21 18:00:43,463 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 537 transitions. Word has length 30 [2021-08-21 18:00:43,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:43,463 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 537 transitions. [2021-08-21 18:00:43,463 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) [2021-08-21 18:00:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 537 transitions. [2021-08-21 18:00:43,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:00:43,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:43,464 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:43,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:43,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:43,677 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:43,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1047768772, now seen corresponding path program 38 times [2021-08-21 18:00:43,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:43,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945317831] [2021-08-21 18:00:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:43,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:43,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:43,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945317831] [2021-08-21 18:00:43,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945317831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:43,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122125906] [2021-08-21 18:00:43,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:43,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:43,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:43,748 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) [2021-08-21 18:00:43,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:00:45,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:45,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:45,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:00:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:45,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122125906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:45,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:45,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 18:00:45,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205379910] [2021-08-21 18:00:45,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:00:45,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:00:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:00:45,384 INFO L87 Difference]: Start difference. First operand 251 states and 537 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) [2021-08-21 18:00:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:45,464 INFO L93 Difference]: Finished difference Result 258 states and 543 transitions. [2021-08-21 18:00:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:00:45,464 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 30 [2021-08-21 18:00:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:45,465 INFO L225 Difference]: With dead ends: 258 [2021-08-21 18:00:45,465 INFO L226 Difference]: Without dead ends: 247 [2021-08-21 18:00:45,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:00:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-21 18:00:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 49. [2021-08-21 18:00:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.5625) internal successors, (75), 48 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 75 transitions. [2021-08-21 18:00:45,467 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 75 transitions. Word has length 30 [2021-08-21 18:00:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:45,467 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 75 transitions. [2021-08-21 18:00:45,467 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) [2021-08-21 18:00:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 75 transitions. [2021-08-21 18:00:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:00:45,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:45,468 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:45,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 18:00:45,681 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,SelfDestructingSolverStorable51 [2021-08-21 18:00:45,681 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1621034753, now seen corresponding path program 9 times [2021-08-21 18:00:45,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:45,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189284812] [2021-08-21 18:00:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:45,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:46,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:46,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189284812] [2021-08-21 18:00:46,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189284812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:46,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808081931] [2021-08-21 18:00:46,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:46,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:46,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:46,301 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) [2021-08-21 18:00:46,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:00:47,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:00:47,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:47,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:00:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:00:48,783 INFO L354 Elim1Store]: treesize reduction 32, result has 74.0 percent of original size [2021-08-21 18:00:48,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 45 treesize of output 115 [2021-08-21 18:00:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:51,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808081931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:51,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:51,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:00:51,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384044570] [2021-08-21 18:00:51,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:00:51,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:51,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:00:51,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:00:51,096 INFO L87 Difference]: Start difference. First operand 49 states and 75 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:00:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:53,411 INFO L93 Difference]: Finished difference Result 104 states and 162 transitions. [2021-08-21 18:00:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:00:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:00:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:53,412 INFO L225 Difference]: With dead ends: 104 [2021-08-21 18:00:53,412 INFO L226 Difference]: Without dead ends: 98 [2021-08-21 18:00:53,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2559.9ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:00:53,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-21 18:00:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2021-08-21 18:00:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 61 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 97 transitions. [2021-08-21 18:00:53,414 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 97 transitions. Word has length 32 [2021-08-21 18:00:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:53,414 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 97 transitions. [2021-08-21 18:00:53,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:00:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 97 transitions. [2021-08-21 18:00:53,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:00:53,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:53,414 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:53,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:53,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:53,615 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:00:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1597110106, now seen corresponding path program 39 times [2021-08-21 18:00:53,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:53,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192352263] [2021-08-21 18:00:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:53,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:54,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:54,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192352263] [2021-08-21 18:00:54,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192352263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:54,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699822733] [2021-08-21 18:00:54,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:54,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:54,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:54,133 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) [2021-08-21 18:00:54,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:00:55,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:00:55,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:55,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:00:55,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:56,705 INFO L354 Elim1Store]: treesize reduction 22, result has 82.1 percent of original size [2021-08-21 18:00:56,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 133 [2021-08-21 18:00:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:58,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699822733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:58,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:58,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:00:58,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823498580] [2021-08-21 18:00:58,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:00:58,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:58,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:00:58,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:00:58,909 INFO L87 Difference]: Start difference. First operand 62 states and 97 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:01:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:00,848 INFO L93 Difference]: Finished difference Result 104 states and 158 transitions. [2021-08-21 18:01:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:01:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:01:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:00,849 INFO L225 Difference]: With dead ends: 104 [2021-08-21 18:01:00,849 INFO L226 Difference]: Without dead ends: 98 [2021-08-21 18:01:00,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2327.4ms TimeCoverageRelationStatistics Valid=256, Invalid=3404, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:01:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-21 18:01:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-08-21 18:01:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6031746031746033) internal successors, (101), 63 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 101 transitions. [2021-08-21 18:01:00,850 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 101 transitions. Word has length 32 [2021-08-21 18:01:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:00,851 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 101 transitions. [2021-08-21 18:01:00,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:01:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 101 transitions. [2021-08-21 18:01:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:00,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:00,851 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:00,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:01,053 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,SelfDestructingSolverStorable53 [2021-08-21 18:01:01,053 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:01,053 INFO L82 PathProgramCache]: Analyzing trace with hash 145480478, now seen corresponding path program 40 times [2021-08-21 18:01:01,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:01,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660365396] [2021-08-21 18:01:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:01,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:01,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:01,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660365396] [2021-08-21 18:01:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660365396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:01,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075639205] [2021-08-21 18:01:01,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:01,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:01,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:01,654 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) [2021-08-21 18:01:01,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:01:03,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:03,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:03,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:01:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:03,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:01:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:04,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075639205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:04,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:04,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:01:04,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259194355] [2021-08-21 18:01:04,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:01:04,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:04,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:01:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:01:04,019 INFO L87 Difference]: Start difference. First operand 64 states and 101 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:05,324 INFO L93 Difference]: Finished difference Result 116 states and 171 transitions. [2021-08-21 18:01:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:01:05,325 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:01:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:05,325 INFO L225 Difference]: With dead ends: 116 [2021-08-21 18:01:05,325 INFO L226 Difference]: Without dead ends: 110 [2021-08-21 18:01:05,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1599.1ms TimeCoverageRelationStatistics Valid=251, Invalid=2719, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:01:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-21 18:01:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 64. [2021-08-21 18:01:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6031746031746033) internal successors, (101), 63 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 101 transitions. [2021-08-21 18:01:05,327 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 101 transitions. Word has length 32 [2021-08-21 18:01:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:05,327 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 101 transitions. [2021-08-21 18:01:05,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 101 transitions. [2021-08-21 18:01:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:05,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:05,328 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:05,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 18:01:05,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 18:01:05,537 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1334296866, now seen corresponding path program 41 times [2021-08-21 18:01:05,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:05,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500924119] [2021-08-21 18:01:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:05,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:06,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:06,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500924119] [2021-08-21 18:01:06,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500924119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:06,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038386192] [2021-08-21 18:01:06,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:06,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:06,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:06,064 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) [2021-08-21 18:01:06,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:01:07,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:01:07,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:07,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:01:07,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:08,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:01:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:08,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038386192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:08,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:08,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:01:08,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102705824] [2021-08-21 18:01:08,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:01:08,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:01:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:01:08,531 INFO L87 Difference]: Start difference. First operand 64 states and 101 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:10,166 INFO L93 Difference]: Finished difference Result 134 states and 195 transitions. [2021-08-21 18:01:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:01:10,167 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:01:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:10,167 INFO L225 Difference]: With dead ends: 134 [2021-08-21 18:01:10,167 INFO L226 Difference]: Without dead ends: 122 [2021-08-21 18:01:10,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1828.8ms TimeCoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:01:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-21 18:01:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 68. [2021-08-21 18:01:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 67 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 111 transitions. [2021-08-21 18:01:10,169 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 111 transitions. Word has length 32 [2021-08-21 18:01:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:10,169 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 111 transitions. [2021-08-21 18:01:10,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 111 transitions. [2021-08-21 18:01:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:10,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:10,170 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:10,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:10,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:10,389 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:10,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2026148164, now seen corresponding path program 42 times [2021-08-21 18:01:10,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:10,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542686633] [2021-08-21 18:01:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:10,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:10,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:10,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542686633] [2021-08-21 18:01:10,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542686633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:10,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518084514] [2021-08-21 18:01:10,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:10,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:10,908 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) [2021-08-21 18:01:10,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:01:12,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:01:12,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:12,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:01:12,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:13,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:01:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:13,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518084514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:13,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:13,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:01:13,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015445133] [2021-08-21 18:01:13,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:01:13,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:01:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:01:13,441 INFO L87 Difference]: Start difference. First operand 68 states and 111 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:14,838 INFO L93 Difference]: Finished difference Result 108 states and 168 transitions. [2021-08-21 18:01:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:01:14,838 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:01:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:14,838 INFO L225 Difference]: With dead ends: 108 [2021-08-21 18:01:14,838 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 18:01:14,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1642.3ms TimeCoverageRelationStatistics Valid=254, Invalid=2826, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:01:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 18:01:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-08-21 18:01:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 67 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 111 transitions. [2021-08-21 18:01:14,840 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 111 transitions. Word has length 32 [2021-08-21 18:01:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:14,840 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 111 transitions. [2021-08-21 18:01:14,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 111 transitions. [2021-08-21 18:01:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:14,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:14,840 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:14,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:15,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:15,041 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:15,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:15,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1087915674, now seen corresponding path program 43 times [2021-08-21 18:01:15,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:15,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125721246] [2021-08-21 18:01:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:15,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:15,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:15,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125721246] [2021-08-21 18:01:15,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125721246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:15,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449212440] [2021-08-21 18:01:15,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:15,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:15,610 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) [2021-08-21 18:01:15,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:01:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:17,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:01:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:17,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:01:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:18,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449212440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:18,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:18,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:01:18,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265997276] [2021-08-21 18:01:18,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:01:18,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:01:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:01:18,070 INFO L87 Difference]: Start difference. First operand 68 states and 111 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:19,581 INFO L93 Difference]: Finished difference Result 138 states and 205 transitions. [2021-08-21 18:01:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:01:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:01:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:19,582 INFO L225 Difference]: With dead ends: 138 [2021-08-21 18:01:19,582 INFO L226 Difference]: Without dead ends: 126 [2021-08-21 18:01:19,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1860.5ms TimeCoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:01:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-21 18:01:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 70. [2021-08-21 18:01:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 69 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 115 transitions. [2021-08-21 18:01:19,583 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 115 transitions. Word has length 32 [2021-08-21 18:01:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:19,583 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 115 transitions. [2021-08-21 18:01:19,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 115 transitions. [2021-08-21 18:01:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:19,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:19,584 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:19,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:19,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:19,805 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1779766972, now seen corresponding path program 44 times [2021-08-21 18:01:19,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:19,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079064084] [2021-08-21 18:01:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:19,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:20,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:20,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079064084] [2021-08-21 18:01:20,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079064084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:20,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976718244] [2021-08-21 18:01:20,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:20,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:20,429 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) [2021-08-21 18:01:20,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:01:22,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:22,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:22,126 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:01:22,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:22,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:01:22,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:01:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:23,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976718244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:23,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:23,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:01:23,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775116845] [2021-08-21 18:01:23,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:01:23,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:23,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:01:23,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:01:23,098 INFO L87 Difference]: Start difference. First operand 70 states and 115 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:01:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:24,494 INFO L93 Difference]: Finished difference Result 108 states and 169 transitions. [2021-08-21 18:01:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:01:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:01:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:24,495 INFO L225 Difference]: With dead ends: 108 [2021-08-21 18:01:24,495 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 18:01:24,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1848.1ms TimeCoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:01:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 18:01:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 69. [2021-08-21 18:01:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 113 transitions. [2021-08-21 18:01:24,497 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 113 transitions. Word has length 32 [2021-08-21 18:01:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:24,497 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 113 transitions. [2021-08-21 18:01:24,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:01:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 113 transitions. [2021-08-21 18:01:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:24,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:24,497 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:24,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 18:01:24,712 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,SelfDestructingSolverStorable58 [2021-08-21 18:01:24,713 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:24,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:24,713 INFO L82 PathProgramCache]: Analyzing trace with hash -141901094, now seen corresponding path program 45 times [2021-08-21 18:01:24,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:24,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857000231] [2021-08-21 18:01:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:24,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:25,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:25,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857000231] [2021-08-21 18:01:25,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857000231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:25,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885792872] [2021-08-21 18:01:25,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:25,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:25,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:25,357 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) [2021-08-21 18:01:25,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:01:27,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:01:27,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:27,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:01:27,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:28,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:01:28,353 INFO L354 Elim1Store]: treesize reduction 22, result has 80.5 percent of original size [2021-08-21 18:01:28,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 46 treesize of output 118 [2021-08-21 18:01:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:30,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885792872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:30,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:30,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:01:30,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495291969] [2021-08-21 18:01:30,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:01:30,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:30,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:01:30,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:01:30,322 INFO L87 Difference]: Start difference. First operand 69 states and 113 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:01:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:32,465 INFO L93 Difference]: Finished difference Result 108 states and 169 transitions. [2021-08-21 18:01:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:01:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:01:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:32,466 INFO L225 Difference]: With dead ends: 108 [2021-08-21 18:01:32,466 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 18:01:32,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2643.8ms TimeCoverageRelationStatistics Valid=288, Invalid=3372, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:01:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 18:01:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2021-08-21 18:01:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 69 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 115 transitions. [2021-08-21 18:01:32,468 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 115 transitions. Word has length 32 [2021-08-21 18:01:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:32,468 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 115 transitions. [2021-08-21 18:01:32,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:01:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 115 transitions. [2021-08-21 18:01:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:32,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:32,469 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:32,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:32,688 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,SelfDestructingSolverStorable59 [2021-08-21 18:01:32,689 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2029406595, now seen corresponding path program 46 times [2021-08-21 18:01:32,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:32,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659015680] [2021-08-21 18:01:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:32,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:33,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:33,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659015680] [2021-08-21 18:01:33,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659015680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:33,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847168820] [2021-08-21 18:01:33,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:33,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:33,312 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) [2021-08-21 18:01:33,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:01:35,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:35,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:35,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:01:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:35,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:01:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:35,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847168820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:35,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:35,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:01:35,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388178688] [2021-08-21 18:01:35,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:01:35,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:01:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:01:35,875 INFO L87 Difference]: Start difference. First operand 70 states and 115 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:37,358 INFO L93 Difference]: Finished difference Result 138 states and 205 transitions. [2021-08-21 18:01:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:01:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:01:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:37,359 INFO L225 Difference]: With dead ends: 138 [2021-08-21 18:01:37,359 INFO L226 Difference]: Without dead ends: 126 [2021-08-21 18:01:37,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1817.8ms TimeCoverageRelationStatistics Valid=269, Invalid=3153, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:01:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-21 18:01:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 70. [2021-08-21 18:01:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 69 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 115 transitions. [2021-08-21 18:01:37,361 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 115 transitions. Word has length 32 [2021-08-21 18:01:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:37,361 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 115 transitions. [2021-08-21 18:01:37,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 115 transitions. [2021-08-21 18:01:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:37,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:37,361 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:37,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:37,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:37,573 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1927462498, now seen corresponding path program 47 times [2021-08-21 18:01:37,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:37,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682623575] [2021-08-21 18:01:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:37,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:38,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:38,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682623575] [2021-08-21 18:01:38,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682623575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:38,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698008199] [2021-08-21 18:01:38,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:38,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:38,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:38,203 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) [2021-08-21 18:01:38,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:01:40,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:01:40,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:40,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:01:40,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:40,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:01:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:40,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698008199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:40,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:40,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:01:40,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305956046] [2021-08-21 18:01:40,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:01:40,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:40,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:01:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:01:40,829 INFO L87 Difference]: Start difference. First operand 70 states and 115 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:42,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:42,342 INFO L93 Difference]: Finished difference Result 140 states and 209 transitions. [2021-08-21 18:01:42,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:01:42,342 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:01:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:42,343 INFO L225 Difference]: With dead ends: 140 [2021-08-21 18:01:42,343 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 18:01:42,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1888.5ms TimeCoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:01:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 18:01:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 73. [2021-08-21 18:01:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2021-08-21 18:01:42,345 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 32 [2021-08-21 18:01:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:42,345 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2021-08-21 18:01:42,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2021-08-21 18:01:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:42,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:42,345 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:42,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:42,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:42,560 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1675653500, now seen corresponding path program 48 times [2021-08-21 18:01:42,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:42,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469868102] [2021-08-21 18:01:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:42,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:43,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:43,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469868102] [2021-08-21 18:01:43,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469868102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:43,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398113468] [2021-08-21 18:01:43,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:43,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:43,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:43,201 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) [2021-08-21 18:01:43,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:01:45,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:01:45,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:45,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:01:45,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:45,973 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-21 18:01:45,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 26 [2021-08-21 18:01:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:46,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398113468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:46,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:46,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:01:46,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051168022] [2021-08-21 18:01:46,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:01:46,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:01:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:01:46,092 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:01:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:48,398 INFO L93 Difference]: Finished difference Result 117 states and 179 transitions. [2021-08-21 18:01:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:01:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:01:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:48,399 INFO L225 Difference]: With dead ends: 117 [2021-08-21 18:01:48,399 INFO L226 Difference]: Without dead ends: 105 [2021-08-21 18:01:48,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2867.4ms TimeCoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:01:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-21 18:01:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2021-08-21 18:01:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.6341463414634145) internal successors, (134), 82 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 134 transitions. [2021-08-21 18:01:48,400 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 134 transitions. Word has length 32 [2021-08-21 18:01:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:48,401 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 134 transitions. [2021-08-21 18:01:48,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:01:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 134 transitions. [2021-08-21 18:01:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:48,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:48,401 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:48,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:48,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:48,629 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash -981447918, now seen corresponding path program 49 times [2021-08-21 18:01:48,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:48,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946206328] [2021-08-21 18:01:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:48,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:49,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:49,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946206328] [2021-08-21 18:01:49,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946206328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:49,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624097093] [2021-08-21 18:01:49,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:49,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:49,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:49,226 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) [2021-08-21 18:01:49,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:01:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:51,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:01:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:51,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:01:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:52,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624097093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:52,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:52,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:01:52,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17071766] [2021-08-21 18:01:52,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:01:52,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:01:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:01:52,017 INFO L87 Difference]: Start difference. First operand 83 states and 134 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:53,256 INFO L93 Difference]: Finished difference Result 122 states and 189 transitions. [2021-08-21 18:01:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:01:53,257 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:01:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:53,257 INFO L225 Difference]: With dead ends: 122 [2021-08-21 18:01:53,257 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 18:01:53,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1643.7ms TimeCoverageRelationStatistics Valid=251, Invalid=2719, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:01:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 18:01:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 84. [2021-08-21 18:01:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.6385542168674698) internal successors, (136), 83 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 136 transitions. [2021-08-21 18:01:53,259 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 136 transitions. Word has length 32 [2021-08-21 18:01:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:53,259 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 136 transitions. [2021-08-21 18:01:53,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:01:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 136 transitions. [2021-08-21 18:01:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:53,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:53,260 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:53,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:53,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:53,485 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:53,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:53,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1189859771, now seen corresponding path program 50 times [2021-08-21 18:01:53,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:53,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654563416] [2021-08-21 18:01:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:53,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:54,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:54,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654563416] [2021-08-21 18:01:54,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654563416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:54,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038726319] [2021-08-21 18:01:54,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:54,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:54,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:54,005 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) [2021-08-21 18:01:54,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:01:55,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:55,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:01:55,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:56,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:01:56,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:01:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:56,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038726319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:56,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:56,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:01:56,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996405115] [2021-08-21 18:01:56,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:01:56,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:01:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1488, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:01:56,863 INFO L87 Difference]: Start difference. First operand 84 states and 136 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:01:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:58,456 INFO L93 Difference]: Finished difference Result 149 states and 222 transitions. [2021-08-21 18:01:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:01:58,456 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:01:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:58,457 INFO L225 Difference]: With dead ends: 149 [2021-08-21 18:01:58,457 INFO L226 Difference]: Without dead ends: 137 [2021-08-21 18:01:58,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2026.5ms TimeCoverageRelationStatistics Valid=414, Invalid=3126, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:01:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-21 18:01:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 83. [2021-08-21 18:01:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.6341463414634145) internal successors, (134), 82 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 134 transitions. [2021-08-21 18:01:58,458 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 134 transitions. Word has length 32 [2021-08-21 18:01:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:58,458 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 134 transitions. [2021-08-21 18:01:58,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:01:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 134 transitions. [2021-08-21 18:01:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:01:58,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:58,459 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:58,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 18:01:58,661 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,SelfDestructingSolverStorable64 [2021-08-21 18:01:58,661 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:01:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash 277079800, now seen corresponding path program 51 times [2021-08-21 18:01:58,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:58,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552708781] [2021-08-21 18:01:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:58,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:59,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:59,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552708781] [2021-08-21 18:01:59,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552708781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:59,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180867217] [2021-08-21 18:01:59,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:59,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:59,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:59,164 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) [2021-08-21 18:01:59,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:02:01,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:02:01,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:01,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:02:01,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:02,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:02:02,317 INFO L354 Elim1Store]: treesize reduction 22, result has 80.5 percent of original size [2021-08-21 18:02:02,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 46 treesize of output 118 [2021-08-21 18:02:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180867217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:04,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:04,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:02:04,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411288176] [2021-08-21 18:02:04,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:02:04,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:02:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:02:04,224 INFO L87 Difference]: Start difference. First operand 83 states and 134 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:02:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:06,517 INFO L93 Difference]: Finished difference Result 117 states and 180 transitions. [2021-08-21 18:02:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:02:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:02:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:06,518 INFO L225 Difference]: With dead ends: 117 [2021-08-21 18:02:06,518 INFO L226 Difference]: Without dead ends: 111 [2021-08-21 18:02:06,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2669.4ms TimeCoverageRelationStatistics Valid=288, Invalid=3372, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:02:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-21 18:02:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2021-08-21 18:02:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.6428571428571428) internal successors, (138), 84 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 138 transitions. [2021-08-21 18:02:06,519 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 138 transitions. Word has length 32 [2021-08-21 18:02:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:06,520 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 138 transitions. [2021-08-21 18:02:06,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:02:06,520 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 138 transitions. [2021-08-21 18:02:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:06,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:06,520 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:06,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:06,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:06,721 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:06,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1846579807, now seen corresponding path program 52 times [2021-08-21 18:02:06,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:06,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075675075] [2021-08-21 18:02:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:06,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:07,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:07,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075675075] [2021-08-21 18:02:07,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075675075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:07,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129535411] [2021-08-21 18:02:07,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:02:07,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:07,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:07,221 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) [2021-08-21 18:02:07,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:02:09,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:02:09,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:09,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:02:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:10,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:02:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:10,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129535411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:10,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:10,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:02:10,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689011368] [2021-08-21 18:02:10,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:02:10,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:02:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:02:10,104 INFO L87 Difference]: Start difference. First operand 85 states and 138 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:11,567 INFO L93 Difference]: Finished difference Result 152 states and 226 transitions. [2021-08-21 18:02:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:02:11,567 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:02:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:11,567 INFO L225 Difference]: With dead ends: 152 [2021-08-21 18:02:11,568 INFO L226 Difference]: Without dead ends: 140 [2021-08-21 18:02:11,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1813.5ms TimeCoverageRelationStatistics Valid=269, Invalid=3153, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:02:11,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-21 18:02:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2021-08-21 18:02:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.6385542168674698) internal successors, (136), 83 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 136 transitions. [2021-08-21 18:02:11,569 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 136 transitions. Word has length 32 [2021-08-21 18:02:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:11,569 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 136 transitions. [2021-08-21 18:02:11,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 136 transitions. [2021-08-21 18:02:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:11,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:11,570 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:11,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:11,770 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,SelfDestructingSolverStorable66 [2021-08-21 18:02:11,770 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2050426915, now seen corresponding path program 53 times [2021-08-21 18:02:11,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:11,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352431666] [2021-08-21 18:02:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:11,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:12,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:12,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352431666] [2021-08-21 18:02:12,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352431666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:12,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245094559] [2021-08-21 18:02:12,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:02:12,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:12,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:12,299 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) [2021-08-21 18:02:12,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:02:14,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:02:14,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:14,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:02:14,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:15,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:02:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:15,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245094559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:15,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:15,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:02:15,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526129360] [2021-08-21 18:02:15,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:02:15,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:15,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:02:15,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:02:15,185 INFO L87 Difference]: Start difference. First operand 84 states and 136 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:16,787 INFO L93 Difference]: Finished difference Result 152 states and 226 transitions. [2021-08-21 18:02:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:02:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:02:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:16,788 INFO L225 Difference]: With dead ends: 152 [2021-08-21 18:02:16,788 INFO L226 Difference]: Without dead ends: 140 [2021-08-21 18:02:16,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1832.5ms TimeCoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:02:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-21 18:02:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2021-08-21 18:02:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.6428571428571428) internal successors, (138), 84 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 138 transitions. [2021-08-21 18:02:16,789 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 138 transitions. Word has length 32 [2021-08-21 18:02:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:16,790 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 138 transitions. [2021-08-21 18:02:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 138 transitions. [2021-08-21 18:02:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:16,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:16,790 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:16,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:16,990 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,SelfDestructingSolverStorable67 [2021-08-21 18:02:16,991 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:16,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1552689083, now seen corresponding path program 54 times [2021-08-21 18:02:16,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:17,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353959975] [2021-08-21 18:02:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:17,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:17,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:17,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353959975] [2021-08-21 18:02:17,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353959975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:17,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775010283] [2021-08-21 18:02:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:02:17,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:17,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:17,534 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) [2021-08-21 18:02:17,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:02:19,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:02:19,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:19,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:02:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:20,597 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-21 18:02:20,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 26 [2021-08-21 18:02:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:20,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775010283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:20,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:20,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:02:20,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208158452] [2021-08-21 18:02:20,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:02:20,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:02:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:02:20,694 INFO L87 Difference]: Start difference. First operand 85 states and 138 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:02:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:23,160 INFO L93 Difference]: Finished difference Result 129 states and 196 transitions. [2021-08-21 18:02:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:02:23,161 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:02:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:23,161 INFO L225 Difference]: With dead ends: 129 [2021-08-21 18:02:23,161 INFO L226 Difference]: Without dead ends: 117 [2021-08-21 18:02:23,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 2825.6ms TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:02:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-21 18:02:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 84. [2021-08-21 18:02:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.6385542168674698) internal successors, (136), 83 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 136 transitions. [2021-08-21 18:02:23,163 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 136 transitions. Word has length 32 [2021-08-21 18:02:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:23,163 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 136 transitions. [2021-08-21 18:02:23,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:02:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 136 transitions. [2021-08-21 18:02:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:23,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:23,163 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:23,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:23,363 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,SelfDestructingSolverStorable68 [2021-08-21 18:02:23,364 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:23,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1378338266, now seen corresponding path program 55 times [2021-08-21 18:02:23,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:23,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760106593] [2021-08-21 18:02:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:23,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:23,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:23,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760106593] [2021-08-21 18:02:24,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760106593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:24,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066840472] [2021-08-21 18:02:24,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:02:24,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:24,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:24,001 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) [2021-08-21 18:02:24,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:02:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:26,101 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:02:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:26,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:02:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:26,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066840472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:26,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:26,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:02:26,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605893363] [2021-08-21 18:02:26,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:02:26,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:02:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:02:26,940 INFO L87 Difference]: Start difference. First operand 84 states and 136 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:28,419 INFO L93 Difference]: Finished difference Result 154 states and 230 transitions. [2021-08-21 18:02:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:02:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:02:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:28,420 INFO L225 Difference]: With dead ends: 154 [2021-08-21 18:02:28,420 INFO L226 Difference]: Without dead ends: 142 [2021-08-21 18:02:28,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1927.5ms TimeCoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:02:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-21 18:02:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 88. [2021-08-21 18:02:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.6551724137931034) internal successors, (144), 87 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 144 transitions. [2021-08-21 18:02:28,422 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 144 transitions. Word has length 32 [2021-08-21 18:02:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:28,422 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 144 transitions. [2021-08-21 18:02:28,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 144 transitions. [2021-08-21 18:02:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:28,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:28,423 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:28,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:28,636 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,SelfDestructingSolverStorable69 [2021-08-21 18:02:28,637 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:28,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:28,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2070189564, now seen corresponding path program 56 times [2021-08-21 18:02:28,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:28,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711088843] [2021-08-21 18:02:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:28,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:29,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:29,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711088843] [2021-08-21 18:02:29,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711088843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:29,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464151683] [2021-08-21 18:02:29,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:02:29,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:29,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:29,209 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) [2021-08-21 18:02:29,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 18:02:31,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:02:31,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:31,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:02:31,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:32,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:02:32,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:02:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:32,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464151683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:32,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:32,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:02:32,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354167255] [2021-08-21 18:02:32,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:02:32,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:32,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:02:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:02:32,319 INFO L87 Difference]: Start difference. First operand 88 states and 144 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:02:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:33,631 INFO L93 Difference]: Finished difference Result 124 states and 194 transitions. [2021-08-21 18:02:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:02:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:02:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:33,631 INFO L225 Difference]: With dead ends: 124 [2021-08-21 18:02:33,632 INFO L226 Difference]: Without dead ends: 118 [2021-08-21 18:02:33,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1791.1ms TimeCoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:02:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-21 18:02:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2021-08-21 18:02:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.6511627906976745) internal successors, (142), 86 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 142 transitions. [2021-08-21 18:02:33,633 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 142 transitions. Word has length 32 [2021-08-21 18:02:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:33,633 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 142 transitions. [2021-08-21 18:02:33,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:02:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 142 transitions. [2021-08-21 18:02:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:33,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:33,633 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:33,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:33,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:33,834 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:33,834 INFO L82 PathProgramCache]: Analyzing trace with hash -432323686, now seen corresponding path program 57 times [2021-08-21 18:02:33,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:33,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128103290] [2021-08-21 18:02:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:33,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:34,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:34,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128103290] [2021-08-21 18:02:34,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128103290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:34,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4698472] [2021-08-21 18:02:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:02:34,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:34,352 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) [2021-08-21 18:02:34,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 18:02:36,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:02:36,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:36,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:02:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:37,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:02:37,543 INFO L354 Elim1Store]: treesize reduction 32, result has 74.0 percent of original size [2021-08-21 18:02:37,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 45 treesize of output 115 [2021-08-21 18:02:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:38,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4698472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:38,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:38,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:02:38,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173869881] [2021-08-21 18:02:38,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:02:38,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:02:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:02:38,483 INFO L87 Difference]: Start difference. First operand 87 states and 142 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:02:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:40,328 INFO L93 Difference]: Finished difference Result 120 states and 186 transitions. [2021-08-21 18:02:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:02:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:02:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:40,329 INFO L225 Difference]: With dead ends: 120 [2021-08-21 18:02:40,329 INFO L226 Difference]: Without dead ends: 114 [2021-08-21 18:02:40,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2416.3ms TimeCoverageRelationStatistics Valid=288, Invalid=3372, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:02:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-21 18:02:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2021-08-21 18:02:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.6551724137931034) internal successors, (144), 87 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 144 transitions. [2021-08-21 18:02:40,331 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 144 transitions. Word has length 32 [2021-08-21 18:02:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:40,331 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 144 transitions. [2021-08-21 18:02:40,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:02:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 144 transitions. [2021-08-21 18:02:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:40,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:40,331 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:40,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:40,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:40,532 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1738984003, now seen corresponding path program 58 times [2021-08-21 18:02:40,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:40,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651967396] [2021-08-21 18:02:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:40,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:41,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:41,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651967396] [2021-08-21 18:02:41,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651967396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:41,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238282418] [2021-08-21 18:02:41,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:02:41,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:41,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:41,038 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) [2021-08-21 18:02:41,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 18:02:43,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:02:43,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:43,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:02:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:44,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:02:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:44,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238282418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:44,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:44,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:02:44,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445275492] [2021-08-21 18:02:44,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:02:44,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:44,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:02:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:02:44,117 INFO L87 Difference]: Start difference. First operand 88 states and 144 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:45,615 INFO L93 Difference]: Finished difference Result 154 states and 230 transitions. [2021-08-21 18:02:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:02:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:02:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:45,616 INFO L225 Difference]: With dead ends: 154 [2021-08-21 18:02:45,616 INFO L226 Difference]: Without dead ends: 142 [2021-08-21 18:02:45,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1750.3ms TimeCoverageRelationStatistics Valid=269, Invalid=3153, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:02:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-21 18:02:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 86. [2021-08-21 18:02:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 85 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 140 transitions. [2021-08-21 18:02:45,617 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 140 transitions. Word has length 32 [2021-08-21 18:02:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:45,617 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 140 transitions. [2021-08-21 18:02:45,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 140 transitions. [2021-08-21 18:02:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:45,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:45,618 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:45,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:45,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:45,818 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash 826204032, now seen corresponding path program 59 times [2021-08-21 18:02:45,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:45,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71100294] [2021-08-21 18:02:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:45,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:46,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:46,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71100294] [2021-08-21 18:02:46,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71100294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:46,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626619975] [2021-08-21 18:02:46,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:02:46,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:46,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:46,322 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) [2021-08-21 18:02:46,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 18:02:48,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:02:48,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:48,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:02:48,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:49,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:02:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:49,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626619975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:49,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:49,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:02:49,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291336822] [2021-08-21 18:02:49,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:02:49,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:49,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:02:49,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:02:49,410 INFO L87 Difference]: Start difference. First operand 86 states and 140 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:50,622 INFO L93 Difference]: Finished difference Result 125 states and 195 transitions. [2021-08-21 18:02:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:02:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:02:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:50,623 INFO L225 Difference]: With dead ends: 125 [2021-08-21 18:02:50,623 INFO L226 Difference]: Without dead ends: 119 [2021-08-21 18:02:50,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1563.2ms TimeCoverageRelationStatistics Valid=251, Invalid=2719, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:02:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-21 18:02:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 88. [2021-08-21 18:02:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.6551724137931034) internal successors, (144), 87 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 144 transitions. [2021-08-21 18:02:50,624 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 144 transitions. Word has length 32 [2021-08-21 18:02:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:50,625 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 144 transitions. [2021-08-21 18:02:50,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:02:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 144 transitions. [2021-08-21 18:02:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:50,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:50,625 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:50,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:50,849 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,SelfDestructingSolverStorable73 [2021-08-21 18:02:50,849 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1297455575, now seen corresponding path program 60 times [2021-08-21 18:02:50,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:50,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972462827] [2021-08-21 18:02:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:50,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:51,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:51,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972462827] [2021-08-21 18:02:51,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972462827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:51,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182690604] [2021-08-21 18:02:51,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:02:51,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:51,437 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) [2021-08-21 18:02:51,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 18:02:53,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:02:53,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:53,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-21 18:02:53,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:54,895 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-08-21 18:02:54,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 132 [2021-08-21 18:02:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:57,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182690604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:57,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:57,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:02:57,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14737865] [2021-08-21 18:02:57,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:02:57,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:02:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:02:57,295 INFO L87 Difference]: Start difference. First operand 88 states and 144 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:02:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:59,148 INFO L93 Difference]: Finished difference Result 119 states and 183 transitions. [2021-08-21 18:02:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:02:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:02:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:59,149 INFO L225 Difference]: With dead ends: 119 [2021-08-21 18:02:59,149 INFO L226 Difference]: Without dead ends: 113 [2021-08-21 18:02:59,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2374.3ms TimeCoverageRelationStatistics Valid=255, Invalid=3405, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:02:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-21 18:02:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-08-21 18:02:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.6704545454545454) internal successors, (147), 88 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 147 transitions. [2021-08-21 18:02:59,151 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 147 transitions. Word has length 32 [2021-08-21 18:02:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:59,151 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 147 transitions. [2021-08-21 18:02:59,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:02:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 147 transitions. [2021-08-21 18:02:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:02:59,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:59,152 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:59,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:59,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:59,363 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:02:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash 445135009, now seen corresponding path program 61 times [2021-08-21 18:02:59,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:59,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917950409] [2021-08-21 18:02:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:59,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:59,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:59,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917950409] [2021-08-21 18:02:59,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917950409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:59,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503241036] [2021-08-21 18:02:59,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:02:59,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:59,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:59,890 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) [2021-08-21 18:02:59,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 18:03:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:02,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:03:02,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:02,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:03:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:03,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503241036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:03,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:03,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:03:03,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837074193] [2021-08-21 18:03:03,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:03:03,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:03,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:03:03,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:03:03,050 INFO L87 Difference]: Start difference. First operand 89 states and 147 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:04,296 INFO L93 Difference]: Finished difference Result 137 states and 208 transitions. [2021-08-21 18:03:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:03:04,296 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:03:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:04,296 INFO L225 Difference]: With dead ends: 137 [2021-08-21 18:03:04,297 INFO L226 Difference]: Without dead ends: 131 [2021-08-21 18:03:04,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1559.0ms TimeCoverageRelationStatistics Valid=251, Invalid=2719, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:03:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-21 18:03:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 87. [2021-08-21 18:03:04,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.6511627906976745) internal successors, (142), 86 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 142 transitions. [2021-08-21 18:03:04,298 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 142 transitions. Word has length 32 [2021-08-21 18:03:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:04,298 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 142 transitions. [2021-08-21 18:03:04,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 142 transitions. [2021-08-21 18:03:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:03:04,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:04,299 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:04,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:04,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:04,513 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:03:04,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:04,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1501302683, now seen corresponding path program 62 times [2021-08-21 18:03:04,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:04,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549254714] [2021-08-21 18:03:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:04,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:05,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:05,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549254714] [2021-08-21 18:03:05,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549254714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:05,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036260039] [2021-08-21 18:03:05,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:03:05,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:05,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:05,030 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) [2021-08-21 18:03:05,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 18:03:07,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:03:07,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:07,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:03:07,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:08,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:03:08,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:03:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:08,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036260039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:08,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:08,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:03:08,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158547067] [2021-08-21 18:03:08,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:03:08,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:08,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:03:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:03:08,387 INFO L87 Difference]: Start difference. First operand 87 states and 142 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:03:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:10,069 INFO L93 Difference]: Finished difference Result 152 states and 228 transitions. [2021-08-21 18:03:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:03:10,069 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:03:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:10,070 INFO L225 Difference]: With dead ends: 152 [2021-08-21 18:03:10,070 INFO L226 Difference]: Without dead ends: 140 [2021-08-21 18:03:10,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2086.5ms TimeCoverageRelationStatistics Valid=417, Invalid=3243, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:03:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-21 18:03:10,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 88. [2021-08-21 18:03:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.6551724137931034) internal successors, (144), 87 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 144 transitions. [2021-08-21 18:03:10,071 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 144 transitions. Word has length 32 [2021-08-21 18:03:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:10,072 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 144 transitions. [2021-08-21 18:03:10,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:03:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 144 transitions. [2021-08-21 18:03:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:03:10,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:10,072 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:10,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:10,276 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,SelfDestructingSolverStorable76 [2021-08-21 18:03:10,277 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:03:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:10,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2101813315, now seen corresponding path program 63 times [2021-08-21 18:03:10,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:10,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983797649] [2021-08-21 18:03:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:10,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:10,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:10,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983797649] [2021-08-21 18:03:10,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983797649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:10,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505860907] [2021-08-21 18:03:10,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:03:10,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:10,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:10,813 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) [2021-08-21 18:03:10,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 18:03:13,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:03:13,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:13,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:03:13,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:14,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:03:14,450 INFO L354 Elim1Store]: treesize reduction 22, result has 80.5 percent of original size [2021-08-21 18:03:14,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 46 treesize of output 118 [2021-08-21 18:03:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:16,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505860907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:16,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:16,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:03:16,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819687646] [2021-08-21 18:03:16,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:03:16,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:03:16,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:03:16,802 INFO L87 Difference]: Start difference. First operand 88 states and 144 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:03:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:18,899 INFO L93 Difference]: Finished difference Result 119 states and 184 transitions. [2021-08-21 18:03:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:03:18,900 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:03:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:18,900 INFO L225 Difference]: With dead ends: 119 [2021-08-21 18:03:18,900 INFO L226 Difference]: Without dead ends: 113 [2021-08-21 18:03:18,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2648.9ms TimeCoverageRelationStatistics Valid=288, Invalid=3372, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:03:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-21 18:03:18,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2021-08-21 18:03:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 85 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 140 transitions. [2021-08-21 18:03:18,902 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 140 transitions. Word has length 32 [2021-08-21 18:03:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:18,902 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 140 transitions. [2021-08-21 18:03:18,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:03:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 140 transitions. [2021-08-21 18:03:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:03:18,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:18,902 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:18,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 18:03:19,103 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,SelfDestructingSolverStorable77 [2021-08-21 18:03:19,103 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:03:19,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:19,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1437684842, now seen corresponding path program 64 times [2021-08-21 18:03:19,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:19,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426218503] [2021-08-21 18:03:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:19,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:19,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:19,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426218503] [2021-08-21 18:03:19,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426218503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:19,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041204140] [2021-08-21 18:03:19,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:03:19,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:19,709 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) [2021-08-21 18:03:19,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 18:03:22,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:03:22,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:22,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:03:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:22,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:03:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:23,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041204140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:23,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:23,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:03:23,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321948681] [2021-08-21 18:03:23,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:03:23,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:03:23,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:03:23,060 INFO L87 Difference]: Start difference. First operand 86 states and 140 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:24,245 INFO L93 Difference]: Finished difference Result 126 states and 197 transitions. [2021-08-21 18:03:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:03:24,246 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:03:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:24,246 INFO L225 Difference]: With dead ends: 126 [2021-08-21 18:03:24,246 INFO L226 Difference]: Without dead ends: 120 [2021-08-21 18:03:24,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1650.6ms TimeCoverageRelationStatistics Valid=251, Invalid=2719, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:03:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-21 18:03:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 89. [2021-08-21 18:03:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.6590909090909092) internal successors, (146), 88 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 146 transitions. [2021-08-21 18:03:24,248 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 146 transitions. Word has length 32 [2021-08-21 18:03:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:24,248 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 146 transitions. [2021-08-21 18:03:24,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 146 transitions. [2021-08-21 18:03:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:03:24,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:24,248 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:24,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:24,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:24,449 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:03:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash 733622847, now seen corresponding path program 65 times [2021-08-21 18:03:24,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:24,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792347782] [2021-08-21 18:03:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:24,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:24,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:24,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792347782] [2021-08-21 18:03:24,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792347782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:24,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949805453] [2021-08-21 18:03:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:03:24,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:24,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:24,969 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) [2021-08-21 18:03:24,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 18:03:27,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:03:27,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:27,488 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:03:27,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:28,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:03:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:28,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949805453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:28,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:28,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:03:28,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394750049] [2021-08-21 18:03:28,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:03:28,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:03:28,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:03:28,272 INFO L87 Difference]: Start difference. First operand 89 states and 146 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:29,803 INFO L93 Difference]: Finished difference Result 155 states and 232 transitions. [2021-08-21 18:03:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:03:29,804 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:03:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:29,804 INFO L225 Difference]: With dead ends: 155 [2021-08-21 18:03:29,804 INFO L226 Difference]: Without dead ends: 143 [2021-08-21 18:03:29,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1742.9ms TimeCoverageRelationStatistics Valid=269, Invalid=3153, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:03:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-21 18:03:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 88. [2021-08-21 18:03:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.6551724137931034) internal successors, (144), 87 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 144 transitions. [2021-08-21 18:03:29,806 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 144 transitions. Word has length 32 [2021-08-21 18:03:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:29,806 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 144 transitions. [2021-08-21 18:03:29,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 144 transitions. [2021-08-21 18:03:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:03:29,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:29,806 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:29,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:30,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:30,009 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:03:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash 529775739, now seen corresponding path program 66 times [2021-08-21 18:03:30,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:30,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777886034] [2021-08-21 18:03:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:30,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:30,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:30,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777886034] [2021-08-21 18:03:30,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777886034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:30,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84353395] [2021-08-21 18:03:30,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:03:30,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:30,537 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) [2021-08-21 18:03:30,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 18:03:33,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:03:33,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:33,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:03:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:33,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:03:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:33,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84353395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:33,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:33,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:03:33,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727219038] [2021-08-21 18:03:33,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:03:33,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:03:33,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:03:33,887 INFO L87 Difference]: Start difference. First operand 88 states and 144 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:35,478 INFO L93 Difference]: Finished difference Result 155 states and 232 transitions. [2021-08-21 18:03:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:03:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:03:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:35,479 INFO L225 Difference]: With dead ends: 155 [2021-08-21 18:03:35,479 INFO L226 Difference]: Without dead ends: 143 [2021-08-21 18:03:35,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1823.5ms TimeCoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:03:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-21 18:03:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2021-08-21 18:03:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.6590909090909092) internal successors, (146), 88 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 146 transitions. [2021-08-21 18:03:35,480 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 146 transitions. Word has length 32 [2021-08-21 18:03:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:35,481 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 146 transitions. [2021-08-21 18:03:35,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 146 transitions. [2021-08-21 18:03:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:03:35,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:35,481 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:35,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 18:03:35,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:35,682 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:03:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash -162075559, now seen corresponding path program 67 times [2021-08-21 18:03:35,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:35,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119322071] [2021-08-21 18:03:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:35,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:36,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:36,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119322071] [2021-08-21 18:03:36,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119322071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:36,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113071164] [2021-08-21 18:03:36,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:03:36,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:36,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:36,223 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) [2021-08-21 18:03:36,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 18:03:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:38,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:03:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:39,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:03:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:39,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113071164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:39,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:39,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:03:39,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387279135] [2021-08-21 18:03:39,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:03:39,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:03:39,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:03:39,581 INFO L87 Difference]: Start difference. First operand 89 states and 146 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:40,900 INFO L93 Difference]: Finished difference Result 126 states and 197 transitions. [2021-08-21 18:03:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:03:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:03:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:40,901 INFO L225 Difference]: With dead ends: 126 [2021-08-21 18:03:40,901 INFO L226 Difference]: Without dead ends: 120 [2021-08-21 18:03:40,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1622.7ms TimeCoverageRelationStatistics Valid=254, Invalid=2826, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:03:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-21 18:03:40,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 88. [2021-08-21 18:03:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.6551724137931034) internal successors, (144), 87 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 144 transitions. [2021-08-21 18:03:40,903 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 144 transitions. Word has length 32 [2021-08-21 18:03:40,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:40,903 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 144 transitions. [2021-08-21 18:03:40,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:03:40,903 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 144 transitions. [2021-08-21 18:03:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:03:40,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:40,903 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:40,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:41,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:41,104 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:03:41,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:41,104 INFO L82 PathProgramCache]: Analyzing trace with hash 776156931, now seen corresponding path program 68 times [2021-08-21 18:03:41,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:41,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899548441] [2021-08-21 18:03:41,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:41,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:41,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:41,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899548441] [2021-08-21 18:03:41,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899548441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:41,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46200790] [2021-08-21 18:03:41,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:03:41,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:41,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:41,625 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) [2021-08-21 18:03:41,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 18:03:44,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:03:44,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:44,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:03:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:45,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:03:45,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:03:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:45,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46200790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:45,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:45,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:03:45,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177092714] [2021-08-21 18:03:45,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:03:45,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:03:45,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:03:45,218 INFO L87 Difference]: Start difference. First operand 88 states and 144 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:03:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:46,929 INFO L93 Difference]: Finished difference Result 154 states and 232 transitions. [2021-08-21 18:03:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:03:46,929 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:03:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:46,930 INFO L225 Difference]: With dead ends: 154 [2021-08-21 18:03:46,930 INFO L226 Difference]: Without dead ends: 142 [2021-08-21 18:03:46,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2075.5ms TimeCoverageRelationStatistics Valid=417, Invalid=3243, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:03:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-21 18:03:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 90. [2021-08-21 18:03:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.6629213483146068) internal successors, (148), 89 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 148 transitions. [2021-08-21 18:03:46,931 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 148 transitions. Word has length 32 [2021-08-21 18:03:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:46,931 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 148 transitions. [2021-08-21 18:03:46,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:03:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 148 transitions. [2021-08-21 18:03:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:03:46,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:46,931 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:46,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 18:03:47,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:47,132 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:03:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:47,132 INFO L82 PathProgramCache]: Analyzing trace with hash 84305633, now seen corresponding path program 69 times [2021-08-21 18:03:47,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:47,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439175453] [2021-08-21 18:03:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:47,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:47,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:47,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439175453] [2021-08-21 18:03:47,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439175453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:47,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751406923] [2021-08-21 18:03:47,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:03:47,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:47,691 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) [2021-08-21 18:03:47,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 18:03:50,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:03:50,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:50,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:03:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:51,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:03:51,304 INFO L354 Elim1Store]: treesize reduction 32, result has 74.0 percent of original size [2021-08-21 18:03:51,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 45 treesize of output 115 [2021-08-21 18:03:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:52,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751406923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:52,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:52,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:03:52,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170767704] [2021-08-21 18:03:52,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:03:52,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:03:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:03:52,839 INFO L87 Difference]: Start difference. First operand 90 states and 148 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:03:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:54,756 INFO L93 Difference]: Finished difference Result 123 states and 192 transitions. [2021-08-21 18:03:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:03:54,757 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:03:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:54,757 INFO L225 Difference]: With dead ends: 123 [2021-08-21 18:03:54,757 INFO L226 Difference]: Without dead ends: 117 [2021-08-21 18:03:54,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2431.4ms TimeCoverageRelationStatistics Valid=291, Invalid=3369, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:03:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-21 18:03:54,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 89. [2021-08-21 18:03:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.6590909090909092) internal successors, (146), 88 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 146 transitions. [2021-08-21 18:03:54,759 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 146 transitions. Word has length 32 [2021-08-21 18:03:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:54,759 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 146 transitions. [2021-08-21 18:03:54,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:03:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 146 transitions. [2021-08-21 18:03:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:03:54,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:54,759 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:54,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 18:03:54,959 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,SelfDestructingSolverStorable83 [2021-08-21 18:03:54,960 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:03:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:54,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1722171511, now seen corresponding path program 70 times [2021-08-21 18:03:54,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:54,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528337394] [2021-08-21 18:03:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:54,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:55,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:55,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528337394] [2021-08-21 18:03:55,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528337394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:55,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237607130] [2021-08-21 18:03:55,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:03:55,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:55,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:55,491 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) [2021-08-21 18:03:55,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 18:03:58,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:03:58,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:58,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:03:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:58,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:03:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:58,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237607130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:58,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:58,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:03:58,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174319111] [2021-08-21 18:03:58,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:03:58,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:03:58,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:03:58,936 INFO L87 Difference]: Start difference. First operand 89 states and 146 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:00,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:00,225 INFO L93 Difference]: Finished difference Result 127 states and 199 transitions. [2021-08-21 18:04:00,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:04:00,226 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:04:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:00,227 INFO L225 Difference]: With dead ends: 127 [2021-08-21 18:04:00,227 INFO L226 Difference]: Without dead ends: 121 [2021-08-21 18:04:00,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1565.5ms TimeCoverageRelationStatistics Valid=251, Invalid=2719, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:04:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-21 18:04:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 90. [2021-08-21 18:04:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.6629213483146068) internal successors, (148), 89 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 148 transitions. [2021-08-21 18:04:00,228 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 148 transitions. Word has length 32 [2021-08-21 18:04:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:00,228 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 148 transitions. [2021-08-21 18:04:00,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 148 transitions. [2021-08-21 18:04:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:00,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:00,229 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:00,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:00,433 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash -401488096, now seen corresponding path program 71 times [2021-08-21 18:04:00,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:00,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192002396] [2021-08-21 18:04:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:00,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:00,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:00,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192002396] [2021-08-21 18:04:00,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192002396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:00,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854604180] [2021-08-21 18:04:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:04:00,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:00,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:00,949 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) [2021-08-21 18:04:00,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 18:04:03,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:04:03,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:03,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:04:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:04,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:04:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:04,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854604180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:04,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:04,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:04:04,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626906419] [2021-08-21 18:04:04,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:04:04,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:04,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:04:04,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:04:04,456 INFO L87 Difference]: Start difference. First operand 90 states and 148 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:05,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:05,972 INFO L93 Difference]: Finished difference Result 156 states and 234 transitions. [2021-08-21 18:04:05,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:04:05,973 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:04:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:05,973 INFO L225 Difference]: With dead ends: 156 [2021-08-21 18:04:05,973 INFO L226 Difference]: Without dead ends: 144 [2021-08-21 18:04:05,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1727.5ms TimeCoverageRelationStatistics Valid=269, Invalid=3153, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:04:05,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-21 18:04:05,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 88. [2021-08-21 18:04:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.6551724137931034) internal successors, (144), 87 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 144 transitions. [2021-08-21 18:04:05,975 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 144 transitions. Word has length 32 [2021-08-21 18:04:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:05,975 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 144 transitions. [2021-08-21 18:04:05,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 144 transitions. [2021-08-21 18:04:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:05,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:05,976 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:05,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:06,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:06,181 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:06,181 INFO L82 PathProgramCache]: Analyzing trace with hash -728984482, now seen corresponding path program 72 times [2021-08-21 18:04:06,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:06,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775420198] [2021-08-21 18:04:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:06,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:06,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:06,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775420198] [2021-08-21 18:04:06,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775420198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:06,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186723016] [2021-08-21 18:04:06,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:04:06,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:06,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:06,725 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) [2021-08-21 18:04:06,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 18:04:09,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:04:09,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:09,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:04:09,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:10,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:04:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:10,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186723016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:10,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:10,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:04:10,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324971456] [2021-08-21 18:04:10,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:04:10,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:04:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:04:10,339 INFO L87 Difference]: Start difference. First operand 88 states and 144 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:11,865 INFO L93 Difference]: Finished difference Result 157 states and 236 transitions. [2021-08-21 18:04:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:04:11,865 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:04:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:11,866 INFO L225 Difference]: With dead ends: 157 [2021-08-21 18:04:11,866 INFO L226 Difference]: Without dead ends: 145 [2021-08-21 18:04:11,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1816.9ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:04:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-21 18:04:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2021-08-21 18:04:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.673913043478261) internal successors, (154), 92 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 154 transitions. [2021-08-21 18:04:11,867 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 154 transitions. Word has length 32 [2021-08-21 18:04:11,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:11,868 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 154 transitions. [2021-08-21 18:04:11,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 154 transitions. [2021-08-21 18:04:11,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:11,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:11,868 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:11,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:12,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:12,068 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:12,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:12,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1420835780, now seen corresponding path program 73 times [2021-08-21 18:04:12,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:12,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638666009] [2021-08-21 18:04:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:12,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:12,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:12,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638666009] [2021-08-21 18:04:12,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638666009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:12,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477343764] [2021-08-21 18:04:12,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:04:12,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:12,586 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) [2021-08-21 18:04:12,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 18:04:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:15,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:04:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:16,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:04:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:16,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477343764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:16,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:16,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:04:16,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302066617] [2021-08-21 18:04:16,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:04:16,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:16,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:04:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:04:16,192 INFO L87 Difference]: Start difference. First operand 93 states and 154 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:17,506 INFO L93 Difference]: Finished difference Result 128 states and 201 transitions. [2021-08-21 18:04:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:04:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:04:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:17,507 INFO L225 Difference]: With dead ends: 128 [2021-08-21 18:04:17,507 INFO L226 Difference]: Without dead ends: 122 [2021-08-21 18:04:17,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1627.1ms TimeCoverageRelationStatistics Valid=256, Invalid=2824, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:04:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-21 18:04:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2021-08-21 18:04:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.6703296703296704) internal successors, (152), 91 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 152 transitions. [2021-08-21 18:04:17,508 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 152 transitions. Word has length 32 [2021-08-21 18:04:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:17,509 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 152 transitions. [2021-08-21 18:04:17,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 152 transitions. [2021-08-21 18:04:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:17,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:17,509 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:17,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:17,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:17,709 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:17,710 INFO L82 PathProgramCache]: Analyzing trace with hash 217030098, now seen corresponding path program 74 times [2021-08-21 18:04:17,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:17,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416031163] [2021-08-21 18:04:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:17,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:18,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:18,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416031163] [2021-08-21 18:04:18,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416031163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:18,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279877991] [2021-08-21 18:04:18,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:04:18,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:18,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:18,229 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) [2021-08-21 18:04:18,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 18:04:21,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:04:21,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:21,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:04:21,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:21,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:04:21,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:04:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:22,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279877991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:22,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:22,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:04:22,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200679154] [2021-08-21 18:04:22,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:04:22,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:22,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:04:22,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:04:22,001 INFO L87 Difference]: Start difference. First operand 92 states and 152 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:04:23,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:23,226 INFO L93 Difference]: Finished difference Result 127 states and 200 transitions. [2021-08-21 18:04:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:04:23,226 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:04:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:23,227 INFO L225 Difference]: With dead ends: 127 [2021-08-21 18:04:23,227 INFO L226 Difference]: Without dead ends: 121 [2021-08-21 18:04:23,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1701.2ms TimeCoverageRelationStatistics Valid=366, Invalid=2714, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:04:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-21 18:04:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 93. [2021-08-21 18:04:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.673913043478261) internal successors, (154), 92 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 154 transitions. [2021-08-21 18:04:23,228 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 154 transitions. Word has length 32 [2021-08-21 18:04:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:23,228 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 154 transitions. [2021-08-21 18:04:23,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:04:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 154 transitions. [2021-08-21 18:04:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:23,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:23,229 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:23,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:23,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:23,429 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:23,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1906629509, now seen corresponding path program 75 times [2021-08-21 18:04:23,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:23,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846950968] [2021-08-21 18:04:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:23,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:23,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:23,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846950968] [2021-08-21 18:04:23,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846950968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:23,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418656209] [2021-08-21 18:04:23,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:04:23,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:23,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:23,964 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) [2021-08-21 18:04:23,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 18:04:26,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:04:26,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:26,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:04:26,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:27,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:04:27,812 INFO L354 Elim1Store]: treesize reduction 32, result has 74.0 percent of original size [2021-08-21 18:04:27,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 45 treesize of output 115 [2021-08-21 18:04:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:29,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418656209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:29,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:29,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:04:29,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916298431] [2021-08-21 18:04:29,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:04:29,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:04:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:04:29,015 INFO L87 Difference]: Start difference. First operand 93 states and 154 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:04:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:31,040 INFO L93 Difference]: Finished difference Result 123 states and 191 transitions. [2021-08-21 18:04:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:04:31,040 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:04:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:31,041 INFO L225 Difference]: With dead ends: 123 [2021-08-21 18:04:31,041 INFO L226 Difference]: Without dead ends: 117 [2021-08-21 18:04:31,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2414.8ms TimeCoverageRelationStatistics Valid=261, Invalid=3521, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:04:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-21 18:04:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2021-08-21 18:04:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.6881720430107527) internal successors, (157), 93 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 157 transitions. [2021-08-21 18:04:31,042 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 157 transitions. Word has length 32 [2021-08-21 18:04:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:31,042 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 157 transitions. [2021-08-21 18:04:31,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:04:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 157 transitions. [2021-08-21 18:04:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:31,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:31,043 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:31,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:31,244 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,SelfDestructingSolverStorable89 [2021-08-21 18:04:31,245 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:31,245 INFO L82 PathProgramCache]: Analyzing trace with hash -164038925, now seen corresponding path program 76 times [2021-08-21 18:04:31,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:31,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226573148] [2021-08-21 18:04:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:31,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:31,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:31,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226573148] [2021-08-21 18:04:31,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226573148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:31,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009169461] [2021-08-21 18:04:31,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:04:31,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:31,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:31,831 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) [2021-08-21 18:04:31,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 18:04:34,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:04:34,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:34,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:04:34,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:35,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:04:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:35,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009169461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:35,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:35,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:04:35,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351164783] [2021-08-21 18:04:35,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:04:35,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:04:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:04:35,537 INFO L87 Difference]: Start difference. First operand 94 states and 157 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:36,767 INFO L93 Difference]: Finished difference Result 140 states and 214 transitions. [2021-08-21 18:04:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:04:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:04:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:36,768 INFO L225 Difference]: With dead ends: 140 [2021-08-21 18:04:36,768 INFO L226 Difference]: Without dead ends: 134 [2021-08-21 18:04:36,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1585.7ms TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:04:36,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-21 18:04:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2021-08-21 18:04:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.6703296703296704) internal successors, (152), 91 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 152 transitions. [2021-08-21 18:04:36,770 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 152 transitions. Word has length 32 [2021-08-21 18:04:36,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:36,770 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 152 transitions. [2021-08-21 18:04:36,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 152 transitions. [2021-08-21 18:04:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:36,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:36,770 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:36,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:36,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:36,971 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1475557816, now seen corresponding path program 77 times [2021-08-21 18:04:36,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:36,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772510207] [2021-08-21 18:04:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:36,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:37,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:37,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772510207] [2021-08-21 18:04:37,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772510207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:37,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120584835] [2021-08-21 18:04:37,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:04:37,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:37,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:37,533 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) [2021-08-21 18:04:37,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 18:04:40,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:04:40,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:40,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:04:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:41,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:04:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:41,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120584835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:41,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:41,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:04:41,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360426799] [2021-08-21 18:04:41,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:04:41,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:04:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:04:41,280 INFO L87 Difference]: Start difference. First operand 92 states and 152 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:42,543 INFO L93 Difference]: Finished difference Result 129 states and 203 transitions. [2021-08-21 18:04:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:04:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:04:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:42,543 INFO L225 Difference]: With dead ends: 129 [2021-08-21 18:04:42,543 INFO L226 Difference]: Without dead ends: 123 [2021-08-21 18:04:42,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1569.2ms TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:04:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-21 18:04:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-08-21 18:04:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.6774193548387097) internal successors, (156), 93 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:42,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 156 transitions. [2021-08-21 18:04:42,545 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 156 transitions. Word has length 32 [2021-08-21 18:04:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:42,545 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 156 transitions. [2021-08-21 18:04:42,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 156 transitions. [2021-08-21 18:04:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:42,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:42,546 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:42,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:42,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:42,746 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:42,746 INFO L82 PathProgramCache]: Analyzing trace with hash -648101791, now seen corresponding path program 78 times [2021-08-21 18:04:42,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:42,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264159808] [2021-08-21 18:04:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:42,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:43,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:43,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264159808] [2021-08-21 18:04:43,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264159808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:43,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176981729] [2021-08-21 18:04:43,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:04:43,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:43,250 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) [2021-08-21 18:04:43,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 18:04:46,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:04:46,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:46,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:04:46,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:47,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:04:47,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:04:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:47,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176981729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:47,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:47,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:04:47,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371261092] [2021-08-21 18:04:47,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:04:47,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:47,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:04:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:04:47,200 INFO L87 Difference]: Start difference. First operand 94 states and 156 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:04:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:48,852 INFO L93 Difference]: Finished difference Result 156 states and 236 transitions. [2021-08-21 18:04:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:04:48,852 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:04:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:48,853 INFO L225 Difference]: With dead ends: 156 [2021-08-21 18:04:48,853 INFO L226 Difference]: Without dead ends: 144 [2021-08-21 18:04:48,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1991.2ms TimeCoverageRelationStatistics Valid=416, Invalid=3124, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:04:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-21 18:04:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 93. [2021-08-21 18:04:48,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.673913043478261) internal successors, (154), 92 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 154 transitions. [2021-08-21 18:04:48,855 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 154 transitions. Word has length 32 [2021-08-21 18:04:48,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:48,855 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 154 transitions. [2021-08-21 18:04:48,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:04:48,855 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 154 transitions. [2021-08-21 18:04:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:48,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:48,855 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:48,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 18:04:49,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:49,056 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:49,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:49,056 INFO L82 PathProgramCache]: Analyzing trace with hash -851948899, now seen corresponding path program 79 times [2021-08-21 18:04:49,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:49,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737791941] [2021-08-21 18:04:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:49,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:49,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:49,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737791941] [2021-08-21 18:04:49,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737791941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:49,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275916881] [2021-08-21 18:04:49,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:04:49,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:49,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:49,568 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) [2021-08-21 18:04:49,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 18:04:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:52,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:04:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:53,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:04:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:53,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275916881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:53,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:53,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:04:53,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852252271] [2021-08-21 18:04:53,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:04:53,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:53,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:04:53,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:04:53,444 INFO L87 Difference]: Start difference. First operand 93 states and 154 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:54,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:54,964 INFO L93 Difference]: Finished difference Result 158 states and 238 transitions. [2021-08-21 18:04:54,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:04:54,964 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:04:54,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:54,965 INFO L225 Difference]: With dead ends: 158 [2021-08-21 18:04:54,965 INFO L226 Difference]: Without dead ends: 146 [2021-08-21 18:04:54,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1817.7ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:04:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-21 18:04:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 94. [2021-08-21 18:04:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.6774193548387097) internal successors, (156), 93 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 156 transitions. [2021-08-21 18:04:54,967 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 156 transitions. Word has length 32 [2021-08-21 18:04:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:54,967 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 156 transitions. [2021-08-21 18:04:54,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:04:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 156 transitions. [2021-08-21 18:04:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:04:54,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:54,967 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:54,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 18:04:55,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:55,169 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:04:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1543800197, now seen corresponding path program 80 times [2021-08-21 18:04:55,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:55,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836475871] [2021-08-21 18:04:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:55,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:55,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:55,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836475871] [2021-08-21 18:04:55,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836475871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:55,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646271854] [2021-08-21 18:04:55,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:04:55,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:55,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:55,691 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) [2021-08-21 18:04:55,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 18:04:58,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:04:58,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:58,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:04:58,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:59,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:04:59,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:04:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:59,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646271854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:59,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:59,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:04:59,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728659830] [2021-08-21 18:04:59,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:04:59,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:04:59,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:04:59,703 INFO L87 Difference]: Start difference. First operand 94 states and 156 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:05:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:01,043 INFO L93 Difference]: Finished difference Result 128 states and 202 transitions. [2021-08-21 18:05:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:05:01,044 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:05:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:01,044 INFO L225 Difference]: With dead ends: 128 [2021-08-21 18:05:01,044 INFO L226 Difference]: Without dead ends: 122 [2021-08-21 18:05:01,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1797.0ms TimeCoverageRelationStatistics Valid=369, Invalid=2823, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:05:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-21 18:05:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2021-08-21 18:05:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.6703296703296704) internal successors, (152), 91 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 152 transitions. [2021-08-21 18:05:01,046 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 152 transitions. Word has length 32 [2021-08-21 18:05:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:01,047 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 152 transitions. [2021-08-21 18:05:01,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:05:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 152 transitions. [2021-08-21 18:05:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:05:01,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:01,047 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:01,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 18:05:01,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:01,253 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:05:01,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:01,253 INFO L82 PathProgramCache]: Analyzing trace with hash -788331058, now seen corresponding path program 81 times [2021-08-21 18:05:01,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:01,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444564266] [2021-08-21 18:05:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:01,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:01,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:01,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444564266] [2021-08-21 18:05:01,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444564266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:01,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978503350] [2021-08-21 18:05:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:05:01,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:01,772 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) [2021-08-21 18:05:01,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 18:05:04,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:05:04,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:04,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:05:04,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:05,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:05:05,959 INFO L354 Elim1Store]: treesize reduction 32, result has 74.0 percent of original size [2021-08-21 18:05:05,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 45 treesize of output 115 [2021-08-21 18:05:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:08,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978503350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:08,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:08,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:05:08,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32439820] [2021-08-21 18:05:08,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:05:08,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:05:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:05:08,165 INFO L87 Difference]: Start difference. First operand 92 states and 152 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:05:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:10,240 INFO L93 Difference]: Finished difference Result 134 states and 214 transitions. [2021-08-21 18:05:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:05:10,241 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:05:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:10,241 INFO L225 Difference]: With dead ends: 134 [2021-08-21 18:05:10,241 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 18:05:10,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2533.0ms TimeCoverageRelationStatistics Valid=310, Invalid=3596, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:05:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 18:05:10,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2021-08-21 18:05:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 94 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 158 transitions. [2021-08-21 18:05:10,243 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 158 transitions. Word has length 32 [2021-08-21 18:05:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:10,243 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 158 transitions. [2021-08-21 18:05:10,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:05:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 158 transitions. [2021-08-21 18:05:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:05:10,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:10,244 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:10,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 18:05:10,456 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,SelfDestructingSolverStorable95 [2021-08-21 18:05:10,457 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:05:10,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:10,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1382976631, now seen corresponding path program 82 times [2021-08-21 18:05:10,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:10,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48103796] [2021-08-21 18:05:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:10,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:10,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:10,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48103796] [2021-08-21 18:05:10,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48103796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:10,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99589433] [2021-08-21 18:05:10,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:05:10,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:10,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:10,950 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) [2021-08-21 18:05:10,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 18:05:14,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:05:14,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:14,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:05:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:14,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:05:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:14,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99589433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:14,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:14,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:05:14,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133873438] [2021-08-21 18:05:14,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:05:14,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:05:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:05:14,941 INFO L87 Difference]: Start difference. First operand 95 states and 158 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:05:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:16,393 INFO L93 Difference]: Finished difference Result 159 states and 240 transitions. [2021-08-21 18:05:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:05:16,393 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:05:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:16,394 INFO L225 Difference]: With dead ends: 159 [2021-08-21 18:05:16,394 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 18:05:16,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1730.2ms TimeCoverageRelationStatistics Valid=271, Invalid=3151, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:05:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 18:05:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 94. [2021-08-21 18:05:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.6774193548387097) internal successors, (156), 93 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 156 transitions. [2021-08-21 18:05:16,396 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 156 transitions. Word has length 32 [2021-08-21 18:05:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:16,396 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 156 transitions. [2021-08-21 18:05:16,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:05:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 156 transitions. [2021-08-21 18:05:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:05:16,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:16,396 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:16,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 18:05:16,603 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,SelfDestructingSolverStorable96 [2021-08-21 18:05:16,603 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:05:16,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:16,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1179129523, now seen corresponding path program 83 times [2021-08-21 18:05:16,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:16,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973102483] [2021-08-21 18:05:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:16,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:17,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:17,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973102483] [2021-08-21 18:05:17,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973102483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:17,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308084280] [2021-08-21 18:05:17,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:05:17,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:17,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:17,208 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) [2021-08-21 18:05:17,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 18:05:20,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:05:20,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:20,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:05:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:21,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:05:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:21,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308084280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:21,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:21,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:05:21,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892140745] [2021-08-21 18:05:21,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:05:21,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:21,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:05:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:05:21,150 INFO L87 Difference]: Start difference. First operand 94 states and 156 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:05:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:22,603 INFO L93 Difference]: Finished difference Result 159 states and 240 transitions. [2021-08-21 18:05:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:05:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:05:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:22,604 INFO L225 Difference]: With dead ends: 159 [2021-08-21 18:05:22,604 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 18:05:22,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1844.5ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:05:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 18:05:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 95. [2021-08-21 18:05:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 94 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 158 transitions. [2021-08-21 18:05:22,606 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 158 transitions. Word has length 32 [2021-08-21 18:05:22,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:22,606 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 158 transitions. [2021-08-21 18:05:22,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:05:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 158 transitions. [2021-08-21 18:05:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:05:22,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:22,607 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:22,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 18:05:22,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:22,807 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:05:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash 487278225, now seen corresponding path program 84 times [2021-08-21 18:05:22,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:22,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9072990] [2021-08-21 18:05:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:22,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:23,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:23,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9072990] [2021-08-21 18:05:23,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9072990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:23,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112181199] [2021-08-21 18:05:23,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:05:23,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:23,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:23,410 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) [2021-08-21 18:05:23,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 18:05:26,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:05:26,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:26,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-21 18:05:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:27,782 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-08-21 18:05:27,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 132 [2021-08-21 18:05:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:29,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112181199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:29,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:29,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:05:29,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990117651] [2021-08-21 18:05:29,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:05:29,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:05:29,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:05:29,901 INFO L87 Difference]: Start difference. First operand 95 states and 158 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:05:32,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:32,087 INFO L93 Difference]: Finished difference Result 128 states and 202 transitions. [2021-08-21 18:05:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:05:32,087 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:05:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:32,088 INFO L225 Difference]: With dead ends: 128 [2021-08-21 18:05:32,088 INFO L226 Difference]: Without dead ends: 122 [2021-08-21 18:05:32,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2646.2ms TimeCoverageRelationStatistics Valid=296, Invalid=3486, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:05:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-21 18:05:32,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2021-08-21 18:05:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.673913043478261) internal successors, (154), 92 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 154 transitions. [2021-08-21 18:05:32,089 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 154 transitions. Word has length 32 [2021-08-21 18:05:32,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:32,089 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 154 transitions. [2021-08-21 18:05:32,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:05:32,089 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 154 transitions. [2021-08-21 18:05:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:05:32,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:32,090 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:32,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 18:05:32,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:32,291 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:05:32,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:32,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1425510715, now seen corresponding path program 85 times [2021-08-21 18:05:32,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:32,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66401296] [2021-08-21 18:05:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:32,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:32,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:32,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66401296] [2021-08-21 18:05:32,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66401296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:32,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401879106] [2021-08-21 18:05:32,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:05:32,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:32,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:32,816 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) [2021-08-21 18:05:32,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 18:05:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:36,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:05:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:36,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:05:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:36,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401879106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:36,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:36,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:05:36,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141343368] [2021-08-21 18:05:36,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:05:36,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:36,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:05:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:05:36,880 INFO L87 Difference]: Start difference. First operand 93 states and 154 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:05:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:38,369 INFO L93 Difference]: Finished difference Result 159 states and 240 transitions. [2021-08-21 18:05:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:05:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:05:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:38,370 INFO L225 Difference]: With dead ends: 159 [2021-08-21 18:05:38,370 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 18:05:38,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1817.5ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:05:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 18:05:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 95. [2021-08-21 18:05:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 94 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 158 transitions. [2021-08-21 18:05:38,372 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 158 transitions. Word has length 32 [2021-08-21 18:05:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:38,373 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 158 transitions. [2021-08-21 18:05:38,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:05:38,373 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 158 transitions. [2021-08-21 18:05:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:05:38,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:38,373 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:38,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 18:05:38,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 18:05:38,593 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:05:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash 733659417, now seen corresponding path program 86 times [2021-08-21 18:05:38,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:38,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789159615] [2021-08-21 18:05:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:38,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:39,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:39,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789159615] [2021-08-21 18:05:39,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789159615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:39,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817170359] [2021-08-21 18:05:39,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:05:39,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:39,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:39,209 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) [2021-08-21 18:05:39,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 18:05:42,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:05:42,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:42,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:05:42,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:43,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:05:43,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:05:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:43,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817170359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:43,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:43,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:05:43,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506728919] [2021-08-21 18:05:43,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:05:43,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:05:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:05:43,502 INFO L87 Difference]: Start difference. First operand 95 states and 158 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:05:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:44,747 INFO L93 Difference]: Finished difference Result 129 states and 204 transitions. [2021-08-21 18:05:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:05:44,747 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:05:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:44,748 INFO L225 Difference]: With dead ends: 129 [2021-08-21 18:05:44,748 INFO L226 Difference]: Without dead ends: 123 [2021-08-21 18:05:44,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1804.3ms TimeCoverageRelationStatistics Valid=369, Invalid=2823, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:05:44,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-21 18:05:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-08-21 18:05:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.6774193548387097) internal successors, (156), 93 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 156 transitions. [2021-08-21 18:05:44,750 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 156 transitions. Word has length 32 [2021-08-21 18:05:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:44,750 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 156 transitions. [2021-08-21 18:05:44,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:05:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 156 transitions. [2021-08-21 18:05:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:05:44,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:44,751 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:44,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 18:05:44,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:44,957 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:05:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1923442001, now seen corresponding path program 87 times [2021-08-21 18:05:44,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:44,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511884713] [2021-08-21 18:05:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:44,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:45,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:45,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511884713] [2021-08-21 18:05:45,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511884713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:45,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677050788] [2021-08-21 18:05:45,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:05:45,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:45,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:45,511 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) [2021-08-21 18:05:45,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 18:05:48,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:05:48,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:48,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-21 18:05:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:49,984 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-08-21 18:05:49,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 132 [2021-08-21 18:06:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:00,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677050788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:00,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:00,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:06:00,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429384450] [2021-08-21 18:06:00,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:06:00,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:06:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:06:00,266 INFO L87 Difference]: Start difference. First operand 94 states and 156 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:06:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:02,342 INFO L93 Difference]: Finished difference Result 128 states and 202 transitions. [2021-08-21 18:06:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:06:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:06:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:02,343 INFO L225 Difference]: With dead ends: 128 [2021-08-21 18:06:02,343 INFO L226 Difference]: Without dead ends: 122 [2021-08-21 18:06:02,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2561.1ms TimeCoverageRelationStatistics Valid=295, Invalid=3487, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:06:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-21 18:06:02,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 95. [2021-08-21 18:06:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 94 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 158 transitions. [2021-08-21 18:06:02,345 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 158 transitions. Word has length 32 [2021-08-21 18:06:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:02,345 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 158 transitions. [2021-08-21 18:06:02,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:06:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 158 transitions. [2021-08-21 18:06:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:06:02,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:02,346 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:02,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 18:06:02,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:02,553 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:06:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash 247865688, now seen corresponding path program 88 times [2021-08-21 18:06:02,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:02,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308924437] [2021-08-21 18:06:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:02,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:03,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:03,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308924437] [2021-08-21 18:06:03,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308924437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:03,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442558183] [2021-08-21 18:06:03,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:06:03,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:03,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:03,074 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) [2021-08-21 18:06:03,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 18:06:06,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:06:06,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:06,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:06:06,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:07,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:06:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:07,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442558183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:07,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:07,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:06:07,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885393010] [2021-08-21 18:06:07,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:06:07,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:06:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:06:07,289 INFO L87 Difference]: Start difference. First operand 95 states and 158 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:06:08,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:08,683 INFO L93 Difference]: Finished difference Result 159 states and 240 transitions. [2021-08-21 18:06:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:06:08,683 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:06:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:08,684 INFO L225 Difference]: With dead ends: 159 [2021-08-21 18:06:08,684 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 18:06:08,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1734.3ms TimeCoverageRelationStatistics Valid=271, Invalid=3151, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:06:08,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 18:06:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 92. [2021-08-21 18:06:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.6703296703296704) internal successors, (152), 91 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 152 transitions. [2021-08-21 18:06:08,686 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 152 transitions. Word has length 32 [2021-08-21 18:06:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:08,686 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 152 transitions. [2021-08-21 18:06:08,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:06:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 152 transitions. [2021-08-21 18:06:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:06:08,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:08,686 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:08,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:08,886 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,SelfDestructingSolverStorable102 [2021-08-21 18:06:08,887 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:06:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1770995764, now seen corresponding path program 89 times [2021-08-21 18:06:08,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:08,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741968671] [2021-08-21 18:06:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:08,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:09,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:09,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741968671] [2021-08-21 18:06:09,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741968671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:09,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630962944] [2021-08-21 18:06:09,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:06:09,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:09,453 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) [2021-08-21 18:06:09,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 18:06:12,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:06:12,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:12,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:06:12,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:13,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:06:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:13,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630962944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:13,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:13,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:06:13,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678168995] [2021-08-21 18:06:13,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:06:13,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:06:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:06:13,632 INFO L87 Difference]: Start difference. First operand 92 states and 152 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:06:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:14,872 INFO L93 Difference]: Finished difference Result 131 states and 207 transitions. [2021-08-21 18:06:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:06:14,872 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:06:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:14,873 INFO L225 Difference]: With dead ends: 131 [2021-08-21 18:06:14,873 INFO L226 Difference]: Without dead ends: 125 [2021-08-21 18:06:14,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1572.0ms TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:06:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-21 18:06:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-08-21 18:06:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 160 transitions. [2021-08-21 18:06:14,874 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 160 transitions. Word has length 32 [2021-08-21 18:06:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:14,874 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 160 transitions. [2021-08-21 18:06:14,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:06:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 160 transitions. [2021-08-21 18:06:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:06:14,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:14,875 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:14,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:15,075 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,SelfDestructingSolverStorable103 [2021-08-21 18:06:15,075 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:06:15,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:15,076 INFO L82 PathProgramCache]: Analyzing trace with hash -352663843, now seen corresponding path program 90 times [2021-08-21 18:06:15,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:15,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146876135] [2021-08-21 18:06:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:15,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:15,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:15,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146876135] [2021-08-21 18:06:15,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146876135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:15,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120468888] [2021-08-21 18:06:15,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:06:15,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:15,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:15,608 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) [2021-08-21 18:06:15,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 18:06:19,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:06:19,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:19,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:06:19,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:19,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:06:19,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:06:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:20,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120468888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:20,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:20,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:06:20,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655562328] [2021-08-21 18:06:20,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:06:20,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:06:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:06:20,021 INFO L87 Difference]: Start difference. First operand 96 states and 160 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:06:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:21,557 INFO L93 Difference]: Finished difference Result 158 states and 240 transitions. [2021-08-21 18:06:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:06:21,557 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:06:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:21,557 INFO L225 Difference]: With dead ends: 158 [2021-08-21 18:06:21,557 INFO L226 Difference]: Without dead ends: 146 [2021-08-21 18:06:21,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2014.4ms TimeCoverageRelationStatistics Valid=416, Invalid=3124, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:06:21,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-21 18:06:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 95. [2021-08-21 18:06:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 94 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 158 transitions. [2021-08-21 18:06:21,559 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 158 transitions. Word has length 32 [2021-08-21 18:06:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:21,559 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 158 transitions. [2021-08-21 18:06:21,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:06:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 158 transitions. [2021-08-21 18:06:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:06:21,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:21,559 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:21,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 18:06:21,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:21,765 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:06:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash -556510951, now seen corresponding path program 91 times [2021-08-21 18:06:21,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:21,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310061597] [2021-08-21 18:06:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:21,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:22,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:22,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310061597] [2021-08-21 18:06:22,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310061597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:22,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663516765] [2021-08-21 18:06:22,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:06:22,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:22,286 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) [2021-08-21 18:06:22,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 18:06:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:25,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:06:25,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:26,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:06:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:26,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663516765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:26,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:26,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:06:26,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555911530] [2021-08-21 18:06:26,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:06:26,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:26,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:06:26,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:06:26,570 INFO L87 Difference]: Start difference. First operand 95 states and 158 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:06:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:28,085 INFO L93 Difference]: Finished difference Result 160 states and 242 transitions. [2021-08-21 18:06:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:06:28,085 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:06:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:28,085 INFO L225 Difference]: With dead ends: 160 [2021-08-21 18:06:28,085 INFO L226 Difference]: Without dead ends: 148 [2021-08-21 18:06:28,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1778.7ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:06:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-21 18:06:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 96. [2021-08-21 18:06:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 160 transitions. [2021-08-21 18:06:28,087 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 160 transitions. Word has length 32 [2021-08-21 18:06:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:28,087 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 160 transitions. [2021-08-21 18:06:28,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:06:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 160 transitions. [2021-08-21 18:06:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:06:28,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:28,088 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:28,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 18:06:28,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:28,288 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:06:28,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1248362249, now seen corresponding path program 92 times [2021-08-21 18:06:28,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:28,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705935744] [2021-08-21 18:06:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:28,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:28,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:28,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705935744] [2021-08-21 18:06:28,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705935744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:28,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002948220] [2021-08-21 18:06:28,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:06:28,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:28,836 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) [2021-08-21 18:06:28,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 18:06:32,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:06:32,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:32,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:06:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:33,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:06:33,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:06:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:33,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002948220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:33,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:33,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:06:33,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066354347] [2021-08-21 18:06:33,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:06:33,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:06:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:06:33,307 INFO L87 Difference]: Start difference. First operand 96 states and 160 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:06:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:34,678 INFO L93 Difference]: Finished difference Result 130 states and 206 transitions. [2021-08-21 18:06:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:06:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:06:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:34,679 INFO L225 Difference]: With dead ends: 130 [2021-08-21 18:06:34,679 INFO L226 Difference]: Without dead ends: 124 [2021-08-21 18:06:34,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1774.0ms TimeCoverageRelationStatistics Valid=369, Invalid=2823, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:06:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-21 18:06:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2021-08-21 18:06:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.6774193548387097) internal successors, (156), 93 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 156 transitions. [2021-08-21 18:06:34,680 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 156 transitions. Word has length 32 [2021-08-21 18:06:34,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:34,680 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 156 transitions. [2021-08-21 18:06:34,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:06:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 156 transitions. [2021-08-21 18:06:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:06:34,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:34,680 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:34,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:34,881 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,SelfDestructingSolverStorable106 [2021-08-21 18:06:34,881 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:06:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:34,881 INFO L82 PathProgramCache]: Analyzing trace with hash -310129759, now seen corresponding path program 93 times [2021-08-21 18:06:34,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:34,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364868312] [2021-08-21 18:06:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:34,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:35,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:35,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364868312] [2021-08-21 18:06:35,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364868312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:35,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720262396] [2021-08-21 18:06:35,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:06:35,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:35,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:35,397 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) [2021-08-21 18:06:35,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 18:06:38,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:06:38,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-21 18:06:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:40,164 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-08-21 18:06:40,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 132 [2021-08-21 18:06:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:46,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720262396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:46,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:46,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:06:46,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703369338] [2021-08-21 18:06:46,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:06:46,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:06:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:06:46,983 INFO L87 Difference]: Start difference. First operand 94 states and 156 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:06:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:48,898 INFO L93 Difference]: Finished difference Result 130 states and 205 transitions. [2021-08-21 18:06:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:06:48,898 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:06:48,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:48,898 INFO L225 Difference]: With dead ends: 130 [2021-08-21 18:06:48,898 INFO L226 Difference]: Without dead ends: 124 [2021-08-21 18:06:48,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2337.8ms TimeCoverageRelationStatistics Valid=263, Invalid=3519, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:06:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-21 18:06:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2021-08-21 18:06:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.6979166666666667) internal successors, (163), 96 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 163 transitions. [2021-08-21 18:06:48,900 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 163 transitions. Word has length 32 [2021-08-21 18:06:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:48,900 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 163 transitions. [2021-08-21 18:06:48,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:06:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 163 transitions. [2021-08-21 18:06:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:06:48,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:48,901 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:48,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 18:06:49,101 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,SelfDestructingSolverStorable107 [2021-08-21 18:06:49,101 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:06:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1432460825, now seen corresponding path program 94 times [2021-08-21 18:06:49,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:49,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303491618] [2021-08-21 18:06:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:49,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:49,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:49,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303491618] [2021-08-21 18:06:49,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303491618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:49,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704410832] [2021-08-21 18:06:49,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:06:49,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:49,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:49,620 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) [2021-08-21 18:06:49,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 18:06:53,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:06:53,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:53,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:06:53,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:53,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:06:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:54,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704410832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:54,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:54,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:06:54,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337339410] [2021-08-21 18:06:54,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:06:54,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:54,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:06:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:06:54,039 INFO L87 Difference]: Start difference. First operand 97 states and 163 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:06:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:55,315 INFO L93 Difference]: Finished difference Result 143 states and 220 transitions. [2021-08-21 18:06:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:06:55,315 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:06:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:55,316 INFO L225 Difference]: With dead ends: 143 [2021-08-21 18:06:55,316 INFO L226 Difference]: Without dead ends: 137 [2021-08-21 18:06:55,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1584.0ms TimeCoverageRelationStatistics Valid=256, Invalid=2824, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:06:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-21 18:06:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 96. [2021-08-21 18:06:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 160 transitions. [2021-08-21 18:06:55,318 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 160 transitions. Word has length 32 [2021-08-21 18:06:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:55,318 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 160 transitions. [2021-08-21 18:06:55,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:06:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 160 transitions. [2021-08-21 18:06:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:06:55,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:55,319 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:55,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:55,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:55,529 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:06:55,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1001981057, now seen corresponding path program 95 times [2021-08-21 18:06:55,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:55,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978252061] [2021-08-21 18:06:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:55,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:56,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:56,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978252061] [2021-08-21 18:06:56,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978252061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:56,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965203592] [2021-08-21 18:06:56,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:06:56,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:56,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:56,186 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) [2021-08-21 18:06:56,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 18:06:59,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:06:59,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:59,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:06:59,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:00,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:07:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:00,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965203592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:00,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:00,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:07:00,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602992923] [2021-08-21 18:07:00,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:07:00,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:00,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:07:00,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:07:00,675 INFO L87 Difference]: Start difference. First operand 96 states and 160 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:07:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:01,848 INFO L93 Difference]: Finished difference Result 131 states and 207 transitions. [2021-08-21 18:07:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:07:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:07:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:01,849 INFO L225 Difference]: With dead ends: 131 [2021-08-21 18:07:01,849 INFO L226 Difference]: Without dead ends: 125 [2021-08-21 18:07:01,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1681.2ms TimeCoverageRelationStatistics Valid=256, Invalid=2824, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:07:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-21 18:07:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-08-21 18:07:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 160 transitions. [2021-08-21 18:07:01,851 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 160 transitions. Word has length 32 [2021-08-21 18:07:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:01,851 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 160 transitions. [2021-08-21 18:07:01,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:07:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 160 transitions. [2021-08-21 18:07:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:07:01,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:01,852 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:01,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 18:07:02,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:02,073 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:07:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:02,073 INFO L82 PathProgramCache]: Analyzing trace with hash 635884821, now seen corresponding path program 96 times [2021-08-21 18:07:02,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:02,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223334403] [2021-08-21 18:07:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:02,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:02,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:02,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223334403] [2021-08-21 18:07:02,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223334403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:02,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939103388] [2021-08-21 18:07:02,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:07:02,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:02,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:02,629 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) [2021-08-21 18:07:02,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 18:07:06,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:07:06,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:06,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:07:06,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:07,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:07:07,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:07:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:07,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939103388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:07,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:07,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:07:07,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840127338] [2021-08-21 18:07:07,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:07:07,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:07:07,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:07:07,264 INFO L87 Difference]: Start difference. First operand 96 states and 160 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:07:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:08,560 INFO L93 Difference]: Finished difference Result 131 states and 208 transitions. [2021-08-21 18:07:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:07:08,561 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:07:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:08,561 INFO L225 Difference]: With dead ends: 131 [2021-08-21 18:07:08,561 INFO L226 Difference]: Without dead ends: 125 [2021-08-21 18:07:08,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1744.8ms TimeCoverageRelationStatistics Valid=366, Invalid=2714, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:07:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-21 18:07:08,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2021-08-21 18:07:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.6875) internal successors, (162), 96 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 162 transitions. [2021-08-21 18:07:08,563 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 162 transitions. Word has length 32 [2021-08-21 18:07:08,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:08,563 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 162 transitions. [2021-08-21 18:07:08,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:07:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 162 transitions. [2021-08-21 18:07:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:07:08,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:08,563 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:08,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 18:07:08,764 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,SelfDestructingSolverStorable110 [2021-08-21 18:07:08,764 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:07:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1487774786, now seen corresponding path program 97 times [2021-08-21 18:07:08,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:08,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582963604] [2021-08-21 18:07:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:08,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:09,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:09,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582963604] [2021-08-21 18:07:09,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582963604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:09,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056997254] [2021-08-21 18:07:09,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:07:09,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:09,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:09,296 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) [2021-08-21 18:07:09,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 18:07:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:13,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:07:13,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:13,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:07:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056997254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:13,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:13,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:07:13,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907122142] [2021-08-21 18:07:13,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:07:13,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:13,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:07:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:07:13,843 INFO L87 Difference]: Start difference. First operand 97 states and 162 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:07:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:15,287 INFO L93 Difference]: Finished difference Result 161 states and 244 transitions. [2021-08-21 18:07:15,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:07:15,287 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:07:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:15,288 INFO L225 Difference]: With dead ends: 161 [2021-08-21 18:07:15,288 INFO L226 Difference]: Without dead ends: 149 [2021-08-21 18:07:15,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1752.5ms TimeCoverageRelationStatistics Valid=271, Invalid=3151, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:07:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-21 18:07:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 96. [2021-08-21 18:07:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 160 transitions. [2021-08-21 18:07:15,289 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 160 transitions. Word has length 32 [2021-08-21 18:07:15,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:15,290 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 160 transitions. [2021-08-21 18:07:15,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:07:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 160 transitions. [2021-08-21 18:07:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:07:15,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:15,290 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:15,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 18:07:15,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 18:07:15,490 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:07:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:15,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1361295069, now seen corresponding path program 98 times [2021-08-21 18:07:15,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:15,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611514297] [2021-08-21 18:07:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:15,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:16,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:16,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611514297] [2021-08-21 18:07:16,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611514297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:16,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741188391] [2021-08-21 18:07:16,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:07:16,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:16,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:16,052 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) [2021-08-21 18:07:16,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 18:07:19,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:07:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:19,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:07:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:20,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:07:20,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:07:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:20,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741188391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:20,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:20,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:07:20,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544458667] [2021-08-21 18:07:20,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:07:20,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:20,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:07:20,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:07:20,755 INFO L87 Difference]: Start difference. First operand 96 states and 160 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:07:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:22,440 INFO L93 Difference]: Finished difference Result 161 states and 246 transitions. [2021-08-21 18:07:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:07:22,440 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:07:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:22,441 INFO L225 Difference]: With dead ends: 161 [2021-08-21 18:07:22,441 INFO L226 Difference]: Without dead ends: 149 [2021-08-21 18:07:22,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2103.0ms TimeCoverageRelationStatistics Valid=419, Invalid=3241, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:07:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-21 18:07:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2021-08-21 18:07:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 98 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 166 transitions. [2021-08-21 18:07:22,443 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 166 transitions. Word has length 32 [2021-08-21 18:07:22,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:22,443 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 166 transitions. [2021-08-21 18:07:22,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:07:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 166 transitions. [2021-08-21 18:07:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:07:22,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:22,443 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:22,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 18:07:22,644 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,SelfDestructingSolverStorable112 [2021-08-21 18:07:22,644 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:07:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash 669443771, now seen corresponding path program 99 times [2021-08-21 18:07:22,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:22,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837755330] [2021-08-21 18:07:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:22,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:23,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:23,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837755330] [2021-08-21 18:07:23,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837755330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:23,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604325839] [2021-08-21 18:07:23,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:07:23,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:23,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:23,211 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) [2021-08-21 18:07:23,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 18:07:26,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:07:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-21 18:07:26,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:28,192 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-08-21 18:07:28,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 132 [2021-08-21 18:07:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:31,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604325839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:31,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:31,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:07:31,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83457111] [2021-08-21 18:07:31,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:07:31,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:31,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:07:31,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:07:31,194 INFO L87 Difference]: Start difference. First operand 99 states and 166 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:07:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:34,327 INFO L93 Difference]: Finished difference Result 153 states and 234 transitions. [2021-08-21 18:07:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:07:34,328 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:07:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:34,328 INFO L225 Difference]: With dead ends: 153 [2021-08-21 18:07:34,328 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 18:07:34,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 3141.4ms TimeCoverageRelationStatistics Valid=401, Invalid=4855, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:07:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 18:07:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 98. [2021-08-21 18:07:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.690721649484536) internal successors, (164), 97 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 164 transitions. [2021-08-21 18:07:34,330 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 164 transitions. Word has length 32 [2021-08-21 18:07:34,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:34,330 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 164 transitions. [2021-08-21 18:07:34,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:07:34,330 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 164 transitions. [2021-08-21 18:07:34,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:07:34,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:34,330 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:34,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 18:07:34,532 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,SelfDestructingSolverStorable113 [2021-08-21 18:07:34,533 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:07:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1987657647, now seen corresponding path program 100 times [2021-08-21 18:07:34,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:34,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949008101] [2021-08-21 18:07:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:34,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:35,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:35,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949008101] [2021-08-21 18:07:35,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949008101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:35,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457097731] [2021-08-21 18:07:35,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:07:35,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:35,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:35,072 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) [2021-08-21 18:07:35,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 18:07:38,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:07:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:38,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:07:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:39,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:07:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:39,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457097731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:39,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:39,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:07:39,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841869555] [2021-08-21 18:07:39,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:07:39,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:07:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:07:39,792 INFO L87 Difference]: Start difference. First operand 98 states and 164 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:07:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:40,934 INFO L93 Difference]: Finished difference Result 134 states and 213 transitions. [2021-08-21 18:07:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:07:40,934 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:07:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:40,935 INFO L225 Difference]: With dead ends: 134 [2021-08-21 18:07:40,935 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 18:07:40,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1579.0ms TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:07:40,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 18:07:40,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2021-08-21 18:07:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 98 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 166 transitions. [2021-08-21 18:07:40,937 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 166 transitions. Word has length 32 [2021-08-21 18:07:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:40,937 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 166 transitions. [2021-08-21 18:07:40,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:07:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 166 transitions. [2021-08-21 18:07:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:07:40,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:40,937 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:40,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 18:07:41,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:41,138 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:07:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash 183650042, now seen corresponding path program 101 times [2021-08-21 18:07:41,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:41,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962741284] [2021-08-21 18:07:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:41,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:41,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:41,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962741284] [2021-08-21 18:07:41,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962741284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:41,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788345328] [2021-08-21 18:07:41,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:07:41,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:41,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:41,650 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) [2021-08-21 18:07:41,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 18:07:45,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:07:45,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:45,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:07:45,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:46,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:07:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:46,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788345328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:46,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:46,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:07:46,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111538728] [2021-08-21 18:07:46,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:07:46,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:46,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:07:46,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:07:46,354 INFO L87 Difference]: Start difference. First operand 99 states and 166 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:07:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:47,875 INFO L93 Difference]: Finished difference Result 163 states and 248 transitions. [2021-08-21 18:07:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:07:47,875 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:07:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:47,875 INFO L225 Difference]: With dead ends: 163 [2021-08-21 18:07:47,875 INFO L226 Difference]: Without dead ends: 151 [2021-08-21 18:07:47,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1745.5ms TimeCoverageRelationStatistics Valid=271, Invalid=3151, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:07:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-21 18:07:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 97. [2021-08-21 18:07:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.6875) internal successors, (162), 96 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 162 transitions. [2021-08-21 18:07:47,877 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 162 transitions. Word has length 32 [2021-08-21 18:07:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:47,877 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 162 transitions. [2021-08-21 18:07:47,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:07:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 162 transitions. [2021-08-21 18:07:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:07:47,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:47,878 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:47,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 18:07:48,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:48,105 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:07:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash -729129929, now seen corresponding path program 102 times [2021-08-21 18:07:48,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:48,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374189097] [2021-08-21 18:07:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:48,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:48,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:48,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374189097] [2021-08-21 18:07:48,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374189097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:48,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188290164] [2021-08-21 18:07:48,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:07:48,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:48,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:48,667 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) [2021-08-21 18:07:48,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 18:07:52,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:07:52,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:52,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:07:52,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:53,499 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-21 18:07:53,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 26 [2021-08-21 18:07:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:53,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188290164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:53,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:53,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:07:53,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827351984] [2021-08-21 18:07:53,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:07:53,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:07:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:07:53,600 INFO L87 Difference]: Start difference. First operand 97 states and 162 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:07:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:55,927 INFO L93 Difference]: Finished difference Result 140 states and 218 transitions. [2021-08-21 18:07:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:07:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:07:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:55,928 INFO L225 Difference]: With dead ends: 140 [2021-08-21 18:07:55,928 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 18:07:55,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2721.3ms TimeCoverageRelationStatistics Valid=397, Invalid=3385, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:07:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 18:07:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2021-08-21 18:07:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 98 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 166 transitions. [2021-08-21 18:07:55,930 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 166 transitions. Word has length 32 [2021-08-21 18:07:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:55,930 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 166 transitions. [2021-08-21 18:07:55,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:07:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 166 transitions. [2021-08-21 18:07:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:07:55,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:55,930 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:55,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 18:07:56,130 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,SelfDestructingSolverStorable116 [2021-08-21 18:07:56,131 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:07:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1442177760, now seen corresponding path program 103 times [2021-08-21 18:07:56,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:56,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580079085] [2021-08-21 18:07:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:56,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:56,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:56,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580079085] [2021-08-21 18:07:56,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580079085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:56,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097768597] [2021-08-21 18:07:56,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:07:56,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:56,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:56,631 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) [2021-08-21 18:07:56,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 18:08:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:00,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:08:00,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:01,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:08:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:01,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097768597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:01,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:01,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:08:01,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137639303] [2021-08-21 18:08:01,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:08:01,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:08:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:08:01,387 INFO L87 Difference]: Start difference. First operand 99 states and 166 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:02,874 INFO L93 Difference]: Finished difference Result 163 states and 248 transitions. [2021-08-21 18:08:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:08:02,875 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:08:02,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:02,875 INFO L225 Difference]: With dead ends: 163 [2021-08-21 18:08:02,875 INFO L226 Difference]: Without dead ends: 151 [2021-08-21 18:08:02,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1737.3ms TimeCoverageRelationStatistics Valid=271, Invalid=3151, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:08:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-21 18:08:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 99. [2021-08-21 18:08:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 98 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 166 transitions. [2021-08-21 18:08:02,878 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 166 transitions. Word has length 32 [2021-08-21 18:08:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:02,878 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 166 transitions. [2021-08-21 18:08:02,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 166 transitions. [2021-08-21 18:08:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:08:02,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:02,878 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:02,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 18:08:03,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:03,105 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:08:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1238330652, now seen corresponding path program 104 times [2021-08-21 18:08:03,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:03,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284848758] [2021-08-21 18:08:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:03,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:03,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:03,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284848758] [2021-08-21 18:08:03,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284848758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:03,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734625288] [2021-08-21 18:08:03,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:08:03,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:03,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:03,684 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) [2021-08-21 18:08:03,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 18:08:07,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:08:07,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:07,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:08:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:08,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:08:08,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:08:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:08,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734625288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:08,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:08,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:08:08,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510653781] [2021-08-21 18:08:08,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:08:08,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:08,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:08:08,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:08:08,679 INFO L87 Difference]: Start difference. First operand 99 states and 166 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:08:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:10,396 INFO L93 Difference]: Finished difference Result 162 states and 248 transitions. [2021-08-21 18:08:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:08:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:08:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:10,397 INFO L225 Difference]: With dead ends: 162 [2021-08-21 18:08:10,397 INFO L226 Difference]: Without dead ends: 150 [2021-08-21 18:08:10,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2112.9ms TimeCoverageRelationStatistics Valid=419, Invalid=3241, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:08:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-21 18:08:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 100. [2021-08-21 18:08:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.696969696969697) internal successors, (168), 99 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 168 transitions. [2021-08-21 18:08:10,399 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 168 transitions. Word has length 32 [2021-08-21 18:08:10,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:10,399 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 168 transitions. [2021-08-21 18:08:10,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:08:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 168 transitions. [2021-08-21 18:08:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:08:10,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:10,399 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:10,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 18:08:10,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:10,600 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:08:10,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:10,600 INFO L82 PathProgramCache]: Analyzing trace with hash 546479354, now seen corresponding path program 105 times [2021-08-21 18:08:10,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:10,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845605944] [2021-08-21 18:08:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:10,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:11,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:11,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845605944] [2021-08-21 18:08:11,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845605944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:11,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973245713] [2021-08-21 18:08:11,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:08:11,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:11,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:11,189 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) [2021-08-21 18:08:11,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 18:08:15,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:08:15,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:15,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:08:15,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:08:16,192 INFO L354 Elim1Store]: treesize reduction 32, result has 74.0 percent of original size [2021-08-21 18:08:16,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 45 treesize of output 115 [2021-08-21 18:08:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:17,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973245713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:17,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:17,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:08:17,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570811651] [2021-08-21 18:08:17,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:08:17,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:08:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:08:17,193 INFO L87 Difference]: Start difference. First operand 100 states and 168 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:08:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:19,132 INFO L93 Difference]: Finished difference Result 129 states and 204 transitions. [2021-08-21 18:08:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:08:19,133 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:08:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:19,133 INFO L225 Difference]: With dead ends: 129 [2021-08-21 18:08:19,133 INFO L226 Difference]: Without dead ends: 123 [2021-08-21 18:08:19,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2510.5ms TimeCoverageRelationStatistics Valid=295, Invalid=3487, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:08:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-21 18:08:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2021-08-21 18:08:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 98 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 166 transitions. [2021-08-21 18:08:19,134 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 166 transitions. Word has length 32 [2021-08-21 18:08:19,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:19,135 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 166 transitions. [2021-08-21 18:08:19,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:08:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 166 transitions. [2021-08-21 18:08:19,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:08:19,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:19,135 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:19,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 18:08:19,340 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,SelfDestructingSolverStorable119 [2021-08-21 18:08:19,341 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:08:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:19,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1301574938, now seen corresponding path program 106 times [2021-08-21 18:08:19,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:19,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416707978] [2021-08-21 18:08:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:19,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:19,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:19,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416707978] [2021-08-21 18:08:19,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416707978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:19,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324215612] [2021-08-21 18:08:19,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:08:19,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:19,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:19,952 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) [2021-08-21 18:08:19,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 18:08:24,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:08:24,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:24,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:08:24,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:24,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:08:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:24,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324215612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:24,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:24,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:08:24,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866173969] [2021-08-21 18:08:24,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:08:24,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:24,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:08:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:08:24,873 INFO L87 Difference]: Start difference. First operand 99 states and 166 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:26,399 INFO L93 Difference]: Finished difference Result 167 states and 256 transitions. [2021-08-21 18:08:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:08:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:08:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:26,400 INFO L225 Difference]: With dead ends: 167 [2021-08-21 18:08:26,400 INFO L226 Difference]: Without dead ends: 155 [2021-08-21 18:08:26,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1872.1ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:08:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-21 18:08:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 103. [2021-08-21 18:08:26,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.7058823529411764) internal successors, (174), 102 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 174 transitions. [2021-08-21 18:08:26,402 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 174 transitions. Word has length 32 [2021-08-21 18:08:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:26,402 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 174 transitions. [2021-08-21 18:08:26,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 174 transitions. [2021-08-21 18:08:26,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:08:26,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:26,403 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:26,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 18:08:26,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:26,609 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:08:26,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:26,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1993426236, now seen corresponding path program 107 times [2021-08-21 18:08:26,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:26,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648259148] [2021-08-21 18:08:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:26,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:27,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:27,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648259148] [2021-08-21 18:08:27,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648259148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:27,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334212781] [2021-08-21 18:08:27,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:08:27,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:27,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:27,247 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) [2021-08-21 18:08:27,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 18:08:31,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:08:31,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:31,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:08:31,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:32,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:08:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:32,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334212781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:32,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:32,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:08:32,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949024058] [2021-08-21 18:08:32,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:08:32,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:08:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:08:32,232 INFO L87 Difference]: Start difference. First operand 103 states and 174 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:33,511 INFO L93 Difference]: Finished difference Result 138 states and 221 transitions. [2021-08-21 18:08:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:08:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:08:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:33,512 INFO L225 Difference]: With dead ends: 138 [2021-08-21 18:08:33,512 INFO L226 Difference]: Without dead ends: 132 [2021-08-21 18:08:33,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1700.1ms TimeCoverageRelationStatistics Valid=256, Invalid=2824, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:08:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-21 18:08:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2021-08-21 18:08:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.702970297029703) internal successors, (172), 101 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 172 transitions. [2021-08-21 18:08:33,513 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 172 transitions. Word has length 32 [2021-08-21 18:08:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:33,514 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 172 transitions. [2021-08-21 18:08:33,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 172 transitions. [2021-08-21 18:08:33,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:08:33,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:33,514 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:33,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 18:08:33,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:33,717 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:08:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:33,717 INFO L82 PathProgramCache]: Analyzing trace with hash -355560358, now seen corresponding path program 108 times [2021-08-21 18:08:33,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:33,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534052971] [2021-08-21 18:08:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:33,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:34,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:34,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534052971] [2021-08-21 18:08:34,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534052971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:34,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308855806] [2021-08-21 18:08:34,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:08:34,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:34,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:34,257 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) [2021-08-21 18:08:34,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 18:08:38,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:08:38,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:38,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:08:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:39,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:08:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:39,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308855806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:39,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:39,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:08:39,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52465369] [2021-08-21 18:08:39,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:08:39,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:39,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:08:39,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:08:39,170 INFO L87 Difference]: Start difference. First operand 102 states and 172 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:40,381 INFO L93 Difference]: Finished difference Result 138 states and 221 transitions. [2021-08-21 18:08:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:08:40,382 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:08:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:40,382 INFO L225 Difference]: With dead ends: 138 [2021-08-21 18:08:40,382 INFO L226 Difference]: Without dead ends: 132 [2021-08-21 18:08:40,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1549.7ms TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:08:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-21 18:08:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2021-08-21 18:08:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.7058823529411764) internal successors, (174), 102 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 174 transitions. [2021-08-21 18:08:40,383 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 174 transitions. Word has length 32 [2021-08-21 18:08:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:40,384 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 174 transitions. [2021-08-21 18:08:40,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 174 transitions. [2021-08-21 18:08:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:08:40,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:40,384 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:40,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 18:08:40,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 18:08:40,584 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:08:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:40,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1815747331, now seen corresponding path program 109 times [2021-08-21 18:08:40,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:40,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259153911] [2021-08-21 18:08:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:40,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:41,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:41,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259153911] [2021-08-21 18:08:41,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259153911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:41,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740184769] [2021-08-21 18:08:41,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:08:41,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:41,135 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) [2021-08-21 18:08:41,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 18:08:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:45,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:08:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:46,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:08:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:46,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740184769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:46,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:46,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:08:46,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128813823] [2021-08-21 18:08:46,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:08:46,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:46,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:08:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:08:46,114 INFO L87 Difference]: Start difference. First operand 103 states and 174 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:47,556 INFO L93 Difference]: Finished difference Result 167 states and 256 transitions. [2021-08-21 18:08:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:08:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:08:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:47,557 INFO L225 Difference]: With dead ends: 167 [2021-08-21 18:08:47,557 INFO L226 Difference]: Without dead ends: 155 [2021-08-21 18:08:47,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1798.2ms TimeCoverageRelationStatistics Valid=271, Invalid=3151, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:08:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-21 18:08:47,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2021-08-21 18:08:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.7) internal successors, (170), 100 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 170 transitions. [2021-08-21 18:08:47,559 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 170 transitions. Word has length 32 [2021-08-21 18:08:47,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:47,559 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 170 transitions. [2021-08-21 18:08:47,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:08:47,559 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 170 transitions. [2021-08-21 18:08:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:08:47,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:47,560 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:47,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 18:08:47,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:47,760 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:08:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:47,760 INFO L82 PathProgramCache]: Analyzing trace with hash 902967360, now seen corresponding path program 110 times [2021-08-21 18:08:47,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:47,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553411532] [2021-08-21 18:08:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:47,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:48,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:48,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553411532] [2021-08-21 18:08:48,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553411532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:48,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043486832] [2021-08-21 18:08:48,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:08:48,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:48,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:48,312 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) [2021-08-21 18:08:48,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 18:08:52,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:08:52,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:52,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:08:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:53,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:08:53,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:08:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:53,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043486832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:53,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:53,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:08:53,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495143670] [2021-08-21 18:08:53,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:08:53,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:53,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:08:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:08:53,450 INFO L87 Difference]: Start difference. First operand 101 states and 170 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:08:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:54,753 INFO L93 Difference]: Finished difference Result 137 states and 220 transitions. [2021-08-21 18:08:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:08:54,754 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:08:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:54,754 INFO L225 Difference]: With dead ends: 137 [2021-08-21 18:08:54,754 INFO L226 Difference]: Without dead ends: 131 [2021-08-21 18:08:54,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1722.8ms TimeCoverageRelationStatistics Valid=366, Invalid=2714, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:08:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-21 18:08:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2021-08-21 18:08:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.7058823529411764) internal successors, (174), 102 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 174 transitions. [2021-08-21 18:08:54,756 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 174 transitions. Word has length 32 [2021-08-21 18:08:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:54,756 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 174 transitions. [2021-08-21 18:08:54,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:08:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 174 transitions. [2021-08-21 18:08:54,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:08:54,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:54,756 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:54,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 18:08:54,957 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,SelfDestructingSolverStorable124 [2021-08-21 18:08:54,957 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:08:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1220692247, now seen corresponding path program 111 times [2021-08-21 18:08:54,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:54,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021571592] [2021-08-21 18:08:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:54,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:55,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:55,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021571592] [2021-08-21 18:08:55,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021571592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:55,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398247529] [2021-08-21 18:08:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:08:55,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:55,536 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) [2021-08-21 18:08:55,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 18:08:59,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:08:59,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:59,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:08:59,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:09:00,740 INFO L354 Elim1Store]: treesize reduction 32, result has 74.0 percent of original size [2021-08-21 18:09:00,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 45 treesize of output 115 [2021-08-21 18:09:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:02,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398247529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:02,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:02,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-08-21 18:09:02,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527561621] [2021-08-21 18:09:02,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:09:02,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:09:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:09:02,983 INFO L87 Difference]: Start difference. First operand 103 states and 174 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:09:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:05,940 INFO L93 Difference]: Finished difference Result 167 states and 257 transitions. [2021-08-21 18:09:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:09:05,941 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 32 [2021-08-21 18:09:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:05,941 INFO L225 Difference]: With dead ends: 167 [2021-08-21 18:09:05,941 INFO L226 Difference]: Without dead ends: 155 [2021-08-21 18:09:05,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 3474.6ms TimeCoverageRelationStatistics Valid=397, Invalid=5005, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 18:09:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-21 18:09:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 107. [2021-08-21 18:09:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.7169811320754718) internal successors, (182), 106 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 182 transitions. [2021-08-21 18:09:05,943 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 182 transitions. Word has length 32 [2021-08-21 18:09:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:05,943 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 182 transitions. [2021-08-21 18:09:05,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-08-21 18:09:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 182 transitions. [2021-08-21 18:09:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:09:05,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:05,943 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:05,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 18:09:06,144 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,SelfDestructingSolverStorable125 [2021-08-21 18:09:06,144 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:09:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:06,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1424539355, now seen corresponding path program 112 times [2021-08-21 18:09:06,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:06,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648361583] [2021-08-21 18:09:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:06,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:06,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:06,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648361583] [2021-08-21 18:09:06,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648361583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:06,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19616397] [2021-08-21 18:09:06,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:09:06,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:06,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:06,675 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) [2021-08-21 18:09:06,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 18:09:10,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:09:10,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:10,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:09:10,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:11,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:09:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:11,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19616397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:11,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:11,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:09:11,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648855210] [2021-08-21 18:09:11,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:09:11,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:09:11,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:09:11,785 INFO L87 Difference]: Start difference. First operand 107 states and 182 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:09:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:13,373 INFO L93 Difference]: Finished difference Result 172 states and 266 transitions. [2021-08-21 18:09:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:09:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:09:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:13,374 INFO L225 Difference]: With dead ends: 172 [2021-08-21 18:09:13,374 INFO L226 Difference]: Without dead ends: 160 [2021-08-21 18:09:13,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1874.4ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:09:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-21 18:09:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 108. [2021-08-21 18:09:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.719626168224299) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 184 transitions. [2021-08-21 18:09:13,377 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 184 transitions. Word has length 32 [2021-08-21 18:09:13,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:13,377 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 184 transitions. [2021-08-21 18:09:13,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:09:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 184 transitions. [2021-08-21 18:09:13,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:09:13,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:13,377 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:13,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 18:09:13,580 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,SelfDestructingSolverStorable126 [2021-08-21 18:09:13,581 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:09:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2116390653, now seen corresponding path program 113 times [2021-08-21 18:09:13,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:13,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783674021] [2021-08-21 18:09:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:13,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:14,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:14,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783674021] [2021-08-21 18:09:14,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783674021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:14,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278924429] [2021-08-21 18:09:14,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:09:14,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:14,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:14,113 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) [2021-08-21 18:09:14,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 18:09:18,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:09:18,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:18,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:09:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:19,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:09:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:19,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278924429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:19,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:19,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:09:19,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836739447] [2021-08-21 18:09:19,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:09:19,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:09:19,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:09:19,268 INFO L87 Difference]: Start difference. First operand 108 states and 184 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:09:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:20,622 INFO L93 Difference]: Finished difference Result 143 states and 231 transitions. [2021-08-21 18:09:20,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:09:20,623 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:09:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:20,623 INFO L225 Difference]: With dead ends: 143 [2021-08-21 18:09:20,623 INFO L226 Difference]: Without dead ends: 137 [2021-08-21 18:09:20,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1595.1ms TimeCoverageRelationStatistics Valid=256, Invalid=2824, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:09:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-21 18:09:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 106. [2021-08-21 18:09:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.7142857142857142) internal successors, (180), 105 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 180 transitions. [2021-08-21 18:09:20,626 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 180 transitions. Word has length 32 [2021-08-21 18:09:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:20,626 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 180 transitions. [2021-08-21 18:09:20,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:09:20,626 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 180 transitions. [2021-08-21 18:09:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:09:20,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:20,626 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:20,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:20,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:20,833 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:09:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1360921514, now seen corresponding path program 114 times [2021-08-21 18:09:20,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:20,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616949549] [2021-08-21 18:09:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:20,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:21,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:21,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616949549] [2021-08-21 18:09:21,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616949549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:21,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023373698] [2021-08-21 18:09:21,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:09:21,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:21,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:21,357 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) [2021-08-21 18:09:21,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 18:09:25,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:09:25,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:25,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:09:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:26,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:09:26,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-08-21 18:09:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:26,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023373698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:26,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:26,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 18:09:26,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586550539] [2021-08-21 18:09:26,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:09:26,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:26,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:09:26,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:09:26,682 INFO L87 Difference]: Start difference. First operand 106 states and 180 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:09:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:27,933 INFO L93 Difference]: Finished difference Result 140 states and 226 transitions. [2021-08-21 18:09:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:09:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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 32 [2021-08-21 18:09:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:27,933 INFO L225 Difference]: With dead ends: 140 [2021-08-21 18:09:27,933 INFO L226 Difference]: Without dead ends: 134 [2021-08-21 18:09:27,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1700.7ms TimeCoverageRelationStatistics Valid=366, Invalid=2714, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:09:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-21 18:09:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 106. [2021-08-21 18:09:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.7142857142857142) internal successors, (180), 105 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 180 transitions. [2021-08-21 18:09:27,935 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 180 transitions. Word has length 32 [2021-08-21 18:09:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:27,935 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 180 transitions. [2021-08-21 18:09:27,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 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) [2021-08-21 18:09:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 180 transitions. [2021-08-21 18:09:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:09:27,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:27,936 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:27,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:28,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:28,141 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:09:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:28,141 INFO L82 PathProgramCache]: Analyzing trace with hash 606539067, now seen corresponding path program 115 times [2021-08-21 18:09:28,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:28,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639107707] [2021-08-21 18:09:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:28,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:28,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:28,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639107707] [2021-08-21 18:09:28,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639107707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:28,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408373351] [2021-08-21 18:09:28,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:09:28,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:28,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:28,710 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) [2021-08-21 18:09:28,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 18:09:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:33,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:09:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:33,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:09:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:33,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408373351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:33,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:33,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-08-21 18:09:33,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740592906] [2021-08-21 18:09:33,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:09:33,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:09:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:09:33,852 INFO L87 Difference]: Start difference. First operand 106 states and 180 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:09:35,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:35,419 INFO L93 Difference]: Finished difference Result 171 states and 264 transitions. [2021-08-21 18:09:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:09:35,420 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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 32 [2021-08-21 18:09:35,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:35,420 INFO L225 Difference]: With dead ends: 171 [2021-08-21 18:09:35,420 INFO L226 Difference]: Without dead ends: 159 [2021-08-21 18:09:35,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1831.8ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:09:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-21 18:09:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 107. [2021-08-21 18:09:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.7169811320754718) internal successors, (182), 106 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 182 transitions. [2021-08-21 18:09:35,422 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 182 transitions. Word has length 32 [2021-08-21 18:09:35,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:35,422 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 182 transitions. [2021-08-21 18:09:35,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 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) [2021-08-21 18:09:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 182 transitions. [2021-08-21 18:09:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:09:35,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:35,422 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:35,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:35,623 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,SelfDestructingSolverStorable129 [2021-08-21 18:09:35,623 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:09:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:35,623 INFO L82 PathProgramCache]: Analyzing trace with hash -85312231, now seen corresponding path program 116 times [2021-08-21 18:09:35,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:35,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743297615] [2021-08-21 18:09:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:35,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:36,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:36,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743297615] [2021-08-21 18:09:36,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743297615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:36,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109346737] [2021-08-21 18:09:36,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:09:36,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:36,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:36,141 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) [2021-08-21 18:09:36,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 18:09:40,374 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:09:40,374 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 [2021-08-21 18:09:40,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:09:40,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:40,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:09:40,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:40,548 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-21 18:09:40,550 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:09:40,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:40,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2021-08-21 18:09:40,751 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. [2021-08-21 18:09:40,752 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION [2021-08-21 18:09:40,752 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5INUSE_VIOLATION [2021-08-21 18:09:40,753 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:09:40,753 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 18:09:40,753 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err0INUSE_VIOLATION [2021-08-21 18:09:40,753 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err1INUSE_VIOLATION [2021-08-21 18:09:40,756 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:09:40,756 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:09:40,757 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:09:40 BasicIcfg [2021-08-21 18:09:40,758 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:09:40,758 INFO L168 Benchmark]: Toolchain (without parser) took 712751.19 ms. Allocated memory was 197.1 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 177.3 MB in the beginning and 726.6 MB in the end (delta: -549.3 MB). Peak memory consumption was 819.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:40,758 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 197.1 MB. Free memory is still 178.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:09:40,758 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.12 ms. Allocated memory is still 197.1 MB. Free memory was 177.2 MB in the beginning and 175.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:40,758 INFO L168 Benchmark]: Boogie Preprocessor took 14.05 ms. Allocated memory is still 197.1 MB. Free memory was 175.6 MB in the beginning and 174.6 MB in the end (delta: 990.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:40,759 INFO L168 Benchmark]: RCFGBuilder took 321.90 ms. Allocated memory is still 197.1 MB. Free memory was 174.6 MB in the beginning and 158.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:40,759 INFO L168 Benchmark]: TraceAbstraction took 712386.89 ms. Allocated memory was 197.1 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 157.7 MB in the beginning and 726.6 MB in the end (delta: -568.8 MB). Peak memory consumption was 799.7 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:40,759 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 0.14 ms. Allocated memory is still 197.1 MB. Free memory is still 178.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.12 ms. Allocated memory is still 197.1 MB. Free memory was 177.2 MB in the beginning and 175.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.05 ms. Allocated memory is still 197.1 MB. Free memory was 175.6 MB in the beginning and 174.6 MB in the end (delta: 990.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 321.90 ms. Allocated memory is still 197.1 MB. Free memory was 174.6 MB in the beginning and 158.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 712386.89 ms. Allocated memory was 197.1 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 157.7 MB in the beginning and 726.6 MB in the end (delta: -568.8 MB). Peak memory consumption was 799.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 274, positive: 224, positive conditional: 224, positive unconditional: 0, negative: 50, negative conditional: 50, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 228, positive: 224, positive conditional: 0, positive unconditional: 224, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 92, positive: 90, positive conditional: 0, positive unconditional: 90, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 92, positive: 88, positive conditional: 0, positive unconditional: 88, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 52, positive: 19, positive conditional: 0, positive unconditional: 19, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 228, positive: 134, positive conditional: 0, positive unconditional: 134, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 92, unknown conditional: 0, unknown unconditional: 92] , Statistics on independence cache: Total cache size (in pairs): 92, Positive cache size: 90, Positive conditional cache size: 0, Positive unconditional cache size: 90, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Independence queries for same thread: 46 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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 33 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - 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 33 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - 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 33 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - 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 33 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - 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 33 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - 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 33 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - 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 33 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 712233.1ms, OverallIterations: 131, TraceHistogramMax: 4, EmptinessCheckTime: 62.9ms, AutomataDifference: 202747.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 201.4ms, PartialOrderReductionTime: 168.6ms, HoareTripleCheckerStatistics: 3315 SDtfs, 25579 SDslu, 54991 SDs, 0 SdLazy, 131474 SolverSat, 9277 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60001.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8936 GetRequests, 1905 SyntacticMatches, 138 SemanticMatches, 6893 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89252 ImplicationChecksByTransitivity, 230369.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=251occurred in iteration=51, InterpolantAutomatonStates: 4368, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 344.0ms AutomataMinimizationTime, 130 MinimizatonAttempts, 7225 StatesRemovedByMinimization, 128 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 677.8ms SsaConstructionTime, 2567.6ms SatisfiabilityAnalysisTime, 208243.4ms InterpolantComputationTime, 7678 NumberOfCodeBlocks, 7678 NumberOfCodeBlocksAsserted, 502 NumberOfCheckSat, 7420 ConstructedInterpolants, 360 QuantifiedInterpolants, 137001 SizeOfPredicates, 1467 NumberOfNonLiveVariables, 13377 ConjunctsInSsa, 6286 ConjunctsInUnsatCore, 258 InterpolantComputations, 2 PerfectInterpolantSequences, 99/5095 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