/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapsum4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 23:16:27,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 23:16:27,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 23:16:27,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 23:16:27,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 23:16:27,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 23:16:27,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 23:16:27,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 23:16:27,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 23:16:27,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 23:16:27,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 23:16:27,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 23:16:27,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 23:16:27,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 23:16:27,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 23:16:27,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 23:16:27,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-30 23:16:27,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 23:16:27,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 23:16:27,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 23:16:27,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 23:16:27,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 23:16:27,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 23:16:27,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 23:16:27,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 23:16:27,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 23:16:27,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 23:16:27,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 23:16:27,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 23:16:27,467 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 23:16:27,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 23:16:27,468 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 23:16:27,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 23:16:27,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 23:16:27,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 23:16:27,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 23:16:27,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:16:27,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 23:16:27,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 23:16:27,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 23:16:27,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 23:16:27,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 23:16:27,470 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 23:16:27,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 23:16:27,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 23:16:27,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 23:16:27,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 23:16:27,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 23:16:27,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 23:16:27,718 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 23:16:27,719 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 23:16:27,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum4.i [2022-01-30 23:16:27,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30b19c75a/76c260f0cdb5402a8d1e57da45c1ed7a/FLAGc369468cf [2022-01-30 23:16:28,099 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 23:16:28,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum4.i [2022-01-30 23:16:28,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30b19c75a/76c260f0cdb5402a8d1e57da45c1ed7a/FLAGc369468cf [2022-01-30 23:16:28,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30b19c75a/76c260f0cdb5402a8d1e57da45c1ed7a [2022-01-30 23:16:28,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 23:16:28,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 23:16:28,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 23:16:28,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 23:16:28,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 23:16:28,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318ac09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28, skipping insertion in model container [2022-01-30 23:16:28,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 23:16:28,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 23:16:28,717 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum4.i[1318,1331] [2022-01-30 23:16:28,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:16:28,724 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 23:16:28,736 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum4.i[1318,1331] [2022-01-30 23:16:28,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:16:28,745 INFO L208 MainTranslator]: Completed translation [2022-01-30 23:16:28,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28 WrapperNode [2022-01-30 23:16:28,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 23:16:28,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 23:16:28,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 23:16:28,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 23:16:28,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 23:16:28,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 23:16:28,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 23:16:28,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 23:16:28,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28" (1/1) ... [2022-01-30 23:16:28,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:16:28,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:28,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 23:16:28,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 23:16:28,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 23:16:28,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 23:16:28,818 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 23:16:28,819 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2022-01-30 23:16:28,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 23:16:28,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 23:16:28,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 23:16:28,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 23:16:28,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 23:16:28,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 23:16:28,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 23:16:28,868 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 23:16:28,869 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 23:16:28,972 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 23:16:28,976 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 23:16:28,976 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 23:16:28,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:16:28 BoogieIcfgContainer [2022-01-30 23:16:28,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 23:16:28,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 23:16:28,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 23:16:28,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 23:16:28,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 11:16:28" (1/3) ... [2022-01-30 23:16:28,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3e3592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:16:28, skipping insertion in model container [2022-01-30 23:16:28,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:16:28" (2/3) ... [2022-01-30 23:16:28,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3e3592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:16:28, skipping insertion in model container [2022-01-30 23:16:28,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:16:28" (3/3) ... [2022-01-30 23:16:28,983 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum4.i [2022-01-30 23:16:28,987 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 23:16:28,987 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 23:16:29,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 23:16:29,046 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 23:16:29,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 23:16:29,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 23:16:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 23:16:29,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:29,094 INFO L514 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, 1, 1] [2022-01-30 23:16:29,095 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:29,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1514933818, now seen corresponding path program 1 times [2022-01-30 23:16:29,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:29,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167389396] [2022-01-30 23:16:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:29,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 23:16:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 23:16:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 23:16:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 23:16:29,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:29,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167389396] [2022-01-30 23:16:29,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167389396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:16:29,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:16:29,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 23:16:29,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364241462] [2022-01-30 23:16:29,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:16:29,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:16:29,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:16:29,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:16:29,378 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:16:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:29,430 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-01-30 23:16:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:16:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 23:16:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:29,437 INFO L225 Difference]: With dead ends: 54 [2022-01-30 23:16:29,437 INFO L226 Difference]: Without dead ends: 26 [2022-01-30 23:16:29,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:16:29,445 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:29,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:16:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-30 23:16:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-30 23:16:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-30 23:16:29,481 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-30 23:16:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:29,481 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-30 23:16:29,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:16:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-30 23:16:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 23:16:29,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:29,484 INFO L514 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, 1, 1] [2022-01-30 23:16:29,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 23:16:29,486 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash -649748416, now seen corresponding path program 1 times [2022-01-30 23:16:29,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:29,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101937564] [2022-01-30 23:16:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:29,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 23:16:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 23:16:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 23:16:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 23:16:29,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101937564] [2022-01-30 23:16:29,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101937564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802846114] [2022-01-30 23:16:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:29,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:29,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:29,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:29,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 23:16:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 23:16:29,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 23:16:29,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:16:29,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802846114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:16:29,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:16:29,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 23:16:29,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205439175] [2022-01-30 23:16:29,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:16:29,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:16:29,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:16:29,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:16:29,765 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:16:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:29,774 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-01-30 23:16:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:16:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 23:16:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:29,775 INFO L225 Difference]: With dead ends: 46 [2022-01-30 23:16:29,776 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 23:16:29,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:16:29,777 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:29,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:16:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 23:16:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-30 23:16:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-30 23:16:29,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-30 23:16:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-30 23:16:29,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:16:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-30 23:16:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-30 23:16:29,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:29,784 INFO L514 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, 1, 1, 1, 1] [2022-01-30 23:16:29,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:29,991 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 [2022-01-30 23:16:29,992 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:29,992 INFO L85 PathProgramCache]: Analyzing trace with hash 506973090, now seen corresponding path program 1 times [2022-01-30 23:16:29,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:29,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278883786] [2022-01-30 23:16:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:29,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 23:16:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-30 23:16:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-30 23:16:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 23:16:30,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:30,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278883786] [2022-01-30 23:16:30,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278883786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:30,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883604148] [2022-01-30 23:16:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:30,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:30,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:30,090 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:30,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 23:16:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 23:16:30,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-30 23:16:30,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:16:30,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883604148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:16:30,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:16:30,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-30 23:16:30,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412065399] [2022-01-30 23:16:30,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:16:30,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:16:30,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:16:30,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:16:30,226 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:16:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:30,246 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-30 23:16:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:16:30,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-30 23:16:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:30,248 INFO L225 Difference]: With dead ends: 46 [2022-01-30 23:16:30,248 INFO L226 Difference]: Without dead ends: 29 [2022-01-30 23:16:30,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:16:30,252 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:30,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:16:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-30 23:16:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-30 23:16:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-30 23:16:30,262 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-30 23:16:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:30,262 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-30 23:16:30,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:16:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-30 23:16:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 23:16:30,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:30,263 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:30,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:30,471 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,SelfDestructingSolverStorable2 [2022-01-30 23:16:30,472 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1359785280, now seen corresponding path program 1 times [2022-01-30 23:16:30,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:30,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419029055] [2022-01-30 23:16:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:30,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 23:16:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-30 23:16:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 23:16:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 23:16:30,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419029055] [2022-01-30 23:16:30,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419029055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:30,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813729053] [2022-01-30 23:16:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:30,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:30,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:30,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:30,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 23:16:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 23:16:30,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 23:16:30,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:16:30,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813729053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:16:30,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:16:30,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 23:16:30,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196922501] [2022-01-30 23:16:30,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:16:30,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:16:30,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:16:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:16:30,691 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:16:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:30,699 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-01-30 23:16:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:16:30,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-30 23:16:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:30,700 INFO L225 Difference]: With dead ends: 43 [2022-01-30 23:16:30,700 INFO L226 Difference]: Without dead ends: 30 [2022-01-30 23:16:30,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:16:30,701 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:30,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:16:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-30 23:16:30,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-30 23:16:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-30 23:16:30,705 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-30 23:16:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:30,706 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-30 23:16:30,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:16:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-30 23:16:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-30 23:16:30,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:30,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:30,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:30,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:30,926 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:30,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:30,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1659776706, now seen corresponding path program 1 times [2022-01-30 23:16:30,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:30,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630992796] [2022-01-30 23:16:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:30,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 23:16:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-30 23:16:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 23:16:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:16:30,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630992796] [2022-01-30 23:16:30,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630992796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096758833] [2022-01-30 23:16:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:30,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:30,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:31,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 23:16:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:31,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:16:31,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:16:31,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:16:31,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096758833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:31,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:31,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 23:16:31,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145484165] [2022-01-30 23:16:31,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:31,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 23:16:31,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 23:16:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 23:16:31,276 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:31,382 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-01-30 23:16:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 23:16:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-01-30 23:16:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:31,383 INFO L225 Difference]: With dead ends: 55 [2022-01-30 23:16:31,383 INFO L226 Difference]: Without dead ends: 35 [2022-01-30 23:16:31,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 23:16:31,384 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:31,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:16:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-30 23:16:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-30 23:16:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-30 23:16:31,388 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-30 23:16:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:31,389 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-30 23:16:31,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-30 23:16:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 23:16:31,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:31,390 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:31,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:31,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:31,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash -174953884, now seen corresponding path program 2 times [2022-01-30 23:16:31,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:31,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639439720] [2022-01-30 23:16:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:31,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:31,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:31,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 23:16:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:31,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-30 23:16:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:31,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 23:16:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-30 23:16:31,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639439720] [2022-01-30 23:16:31,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639439720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131989783] [2022-01-30 23:16:31,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 23:16:31,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:31,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:31,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:31,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 23:16:31,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 23:16:31,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:16:31,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 23:16:31,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:16:31,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:16:31,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131989783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:31,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:31,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-30 23:16:31,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522934501] [2022-01-30 23:16:31,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:31,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-30 23:16:31,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-30 23:16:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-30 23:16:31,942 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 23:16:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:32,116 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-30 23:16:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 23:16:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-01-30 23:16:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:32,118 INFO L225 Difference]: With dead ends: 70 [2022-01-30 23:16:32,118 INFO L226 Difference]: Without dead ends: 50 [2022-01-30 23:16:32,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-30 23:16:32,119 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:32,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:16:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-30 23:16:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-30 23:16:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-30 23:16:32,124 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2022-01-30 23:16:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:32,124 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-30 23:16:32,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 23:16:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-30 23:16:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-30 23:16:32,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:32,125 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:32,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:32,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:32,336 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1165450546, now seen corresponding path program 3 times [2022-01-30 23:16:32,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:32,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339945136] [2022-01-30 23:16:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:32,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:32,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:32,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 23:16:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:32,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 23:16:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:32,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 23:16:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-30 23:16:32,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:32,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339945136] [2022-01-30 23:16:32,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339945136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:32,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289057945] [2022-01-30 23:16:32,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 23:16:32,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:32,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:32,408 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:32,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 23:16:32,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 23:16:32,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:16:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:16:32,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-30 23:16:32,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-30 23:16:32,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289057945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:32,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:32,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 23:16:32,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510767582] [2022-01-30 23:16:32,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:32,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 23:16:32,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:32,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 23:16:32,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 23:16:32,629 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 23:16:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:32,721 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-01-30 23:16:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 23:16:32,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-01-30 23:16:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:32,729 INFO L225 Difference]: With dead ends: 70 [2022-01-30 23:16:32,729 INFO L226 Difference]: Without dead ends: 55 [2022-01-30 23:16:32,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 23:16:32,731 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:32,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 47 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:16:32,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-30 23:16:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-30 23:16:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-30 23:16:32,746 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2022-01-30 23:16:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:32,746 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-30 23:16:32,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 23:16:32,747 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-30 23:16:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-30 23:16:32,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:32,749 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:32,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:32,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:32,952 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:32,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1875202744, now seen corresponding path program 4 times [2022-01-30 23:16:32,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:32,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835885942] [2022-01-30 23:16:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:32,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:33,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:33,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 23:16:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:33,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 23:16:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:33,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 23:16:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-30 23:16:33,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:33,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835885942] [2022-01-30 23:16:33,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835885942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:33,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566351480] [2022-01-30 23:16:33,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 23:16:33,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:33,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:33,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:33,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 23:16:33,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 23:16:33,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:16:33,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 23:16:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 23:16:33,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 23:16:33,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566351480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:33,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:33,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-30 23:16:33,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680164290] [2022-01-30 23:16:33,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:33,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-30 23:16:33,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:33,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-30 23:16:33,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-30 23:16:33,373 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:33,604 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2022-01-30 23:16:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-30 23:16:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-01-30 23:16:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:33,607 INFO L225 Difference]: With dead ends: 94 [2022-01-30 23:16:33,607 INFO L226 Difference]: Without dead ends: 66 [2022-01-30 23:16:33,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 23:16:33,610 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:33,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:16:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-30 23:16:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-30 23:16:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-01-30 23:16:33,618 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 72 [2022-01-30 23:16:33,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:33,618 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-01-30 23:16:33,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:33,618 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-01-30 23:16:33,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-30 23:16:33,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:33,619 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:33,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:33,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:33,837 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:33,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1395321890, now seen corresponding path program 5 times [2022-01-30 23:16:33,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:33,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440501574] [2022-01-30 23:16:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:33,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:33,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:33,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 23:16:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:33,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-30 23:16:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:34,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 23:16:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-30 23:16:34,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:34,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440501574] [2022-01-30 23:16:34,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440501574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944713307] [2022-01-30 23:16:34,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 23:16:34,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:34,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:34,018 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:34,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 23:16:34,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-30 23:16:34,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:16:34,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 23:16:34,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-01-30 23:16:34,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-30 23:16:34,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944713307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:34,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:34,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-30 23:16:34,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507967065] [2022-01-30 23:16:34,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:34,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-30 23:16:34,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:34,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-30 23:16:34,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-30 23:16:34,914 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:35,331 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2022-01-30 23:16:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-30 23:16:35,332 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 98 [2022-01-30 23:16:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:35,332 INFO L225 Difference]: With dead ends: 120 [2022-01-30 23:16:35,332 INFO L226 Difference]: Without dead ends: 84 [2022-01-30 23:16:35,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-30 23:16:35,334 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:35,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 55 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:16:35,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-30 23:16:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-30 23:16:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-01-30 23:16:35,340 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 98 [2022-01-30 23:16:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:35,340 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-01-30 23:16:35,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-01-30 23:16:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-30 23:16:35,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:35,341 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:35,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:35,559 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,SelfDestructingSolverStorable8 [2022-01-30 23:16:35,560 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:35,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1900162548, now seen corresponding path program 6 times [2022-01-30 23:16:35,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:35,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15855772] [2022-01-30 23:16:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:35,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:35,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:35,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 23:16:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:35,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-30 23:16:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:35,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-30 23:16:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2022-01-30 23:16:35,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:35,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15855772] [2022-01-30 23:16:35,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15855772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:35,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962001224] [2022-01-30 23:16:35,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 23:16:35,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:35,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:35,716 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:35,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 23:16:35,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-30 23:16:35,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:16:35,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 23:16:35,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2022-01-30 23:16:36,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2007 trivial. 0 not checked. [2022-01-30 23:16:36,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962001224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:36,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:36,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-30 23:16:36,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913645617] [2022-01-30 23:16:36,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:36,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 23:16:36,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:36,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 23:16:36,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-30 23:16:36,249 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:36,595 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2022-01-30 23:16:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-30 23:16:36,596 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2022-01-30 23:16:36,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:36,596 INFO L225 Difference]: With dead ends: 150 [2022-01-30 23:16:36,596 INFO L226 Difference]: Without dead ends: 98 [2022-01-30 23:16:36,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-01-30 23:16:36,598 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:36,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 60 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:16:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-30 23:16:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-30 23:16:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-01-30 23:16:36,603 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 148 [2022-01-30 23:16:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:36,604 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-01-30 23:16:36,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-01-30 23:16:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-30 23:16:36,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:36,605 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:36,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:36,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 23:16:36,819 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1619870154, now seen corresponding path program 7 times [2022-01-30 23:16:36,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:36,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542410250] [2022-01-30 23:16:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:36,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:36,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:36,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 23:16:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:36,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-30 23:16:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:36,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 23:16:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:16:36,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542410250] [2022-01-30 23:16:36,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542410250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60617202] [2022-01-30 23:16:36,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 23:16:36,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:36,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:36,973 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:36,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 23:16:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:37,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-30 23:16:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:16:37,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:16:37,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60617202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:37,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:37,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-01-30 23:16:37,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415192014] [2022-01-30 23:16:37,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:37,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-30 23:16:37,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:37,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-30 23:16:37,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-30 23:16:37,651 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:38,119 INFO L93 Difference]: Finished difference Result 191 states and 213 transitions. [2022-01-30 23:16:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-30 23:16:38,119 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 162 [2022-01-30 23:16:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:38,120 INFO L225 Difference]: With dead ends: 191 [2022-01-30 23:16:38,120 INFO L226 Difference]: Without dead ends: 127 [2022-01-30 23:16:38,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2022-01-30 23:16:38,122 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:38,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 62 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:16:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-30 23:16:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-30 23:16:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-01-30 23:16:38,127 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 162 [2022-01-30 23:16:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:38,127 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-01-30 23:16:38,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-01-30 23:16:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-30 23:16:38,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:38,129 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 28, 28, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:38,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:38,343 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,SelfDestructingSolverStorable10 [2022-01-30 23:16:38,343 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash 647770248, now seen corresponding path program 8 times [2022-01-30 23:16:38,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:38,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902185175] [2022-01-30 23:16:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:38,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:38,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:38,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-30 23:16:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:38,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-30 23:16:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:38,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-30 23:16:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:16:38,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:38,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902185175] [2022-01-30 23:16:38,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902185175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:38,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135722217] [2022-01-30 23:16:38,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 23:16:38,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:38,733 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:38,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 23:16:38,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 23:16:38,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:16:38,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-30 23:16:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:16:39,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:16:40,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135722217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:40,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:40,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-01-30 23:16:40,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481192824] [2022-01-30 23:16:40,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:40,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-30 23:16:40,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-30 23:16:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-30 23:16:40,061 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:41,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:41,377 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2022-01-30 23:16:41,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-30 23:16:41,377 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 192 [2022-01-30 23:16:41,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:41,379 INFO L225 Difference]: With dead ends: 251 [2022-01-30 23:16:41,379 INFO L226 Difference]: Without dead ends: 187 [2022-01-30 23:16:41,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2022-01-30 23:16:41,383 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 134 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:41,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 47 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 23:16:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-30 23:16:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-01-30 23:16:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2022-01-30 23:16:41,390 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 192 [2022-01-30 23:16:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:41,393 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2022-01-30 23:16:41,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2022-01-30 23:16:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-30 23:16:41,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:41,395 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 42, 42, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:41,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:41,610 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,SelfDestructingSolverStorable11 [2022-01-30 23:16:41,610 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1699853180, now seen corresponding path program 9 times [2022-01-30 23:16:41,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:41,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311005961] [2022-01-30 23:16:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:41,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:42,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:42,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-30 23:16:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:42,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-30 23:16:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:42,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-01-30 23:16:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:16:42,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:42,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311005961] [2022-01-30 23:16:42,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311005961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:42,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301663708] [2022-01-30 23:16:42,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 23:16:42,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:42,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:42,766 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:42,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 23:16:43,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-30 23:16:43,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:16:43,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 23:16:43,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 4377 trivial. 0 not checked. [2022-01-30 23:16:44,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5227 trivial. 0 not checked. [2022-01-30 23:16:44,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301663708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:44,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:44,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 13, 13] total 84 [2022-01-30 23:16:44,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972133721] [2022-01-30 23:16:44,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:44,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-30 23:16:44,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:44,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-30 23:16:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=4865, Unknown=0, NotChecked=0, Total=6972 [2022-01-30 23:16:44,735 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:46,955 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2022-01-30 23:16:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-30 23:16:46,957 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 252 [2022-01-30 23:16:46,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:46,958 INFO L225 Difference]: With dead ends: 278 [2022-01-30 23:16:46,958 INFO L226 Difference]: Without dead ends: 214 [2022-01-30 23:16:46,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5209 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6315, Invalid=20745, Unknown=0, NotChecked=0, Total=27060 [2022-01-30 23:16:46,964 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 191 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:46,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 75 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 23:16:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-30 23:16:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-01-30 23:16:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 205 states have (on average 1.0146341463414634) internal successors, (208), 205 states have internal predecessors, (208), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2022-01-30 23:16:46,970 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 252 [2022-01-30 23:16:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:46,970 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2022-01-30 23:16:46,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2022-01-30 23:16:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-30 23:16:46,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:46,973 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 42, 42, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:46,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:47,186 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,SelfDestructingSolverStorable12 [2022-01-30 23:16:47,186 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:47,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1252199886, now seen corresponding path program 10 times [2022-01-30 23:16:47,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:47,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974762133] [2022-01-30 23:16:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:47,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:48,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:48,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 23:16:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:48,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-30 23:16:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:48,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-01-30 23:16:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2022-01-30 23:16:48,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974762133] [2022-01-30 23:16:48,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974762133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527801912] [2022-01-30 23:16:48,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 23:16:48,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:48,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:48,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:48,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 23:16:48,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 23:16:48,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:16:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 23:16:48,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:16:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2022-01-30 23:16:49,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:16:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2022-01-30 23:16:49,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527801912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:16:49,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:16:49,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 17, 17] total 93 [2022-01-30 23:16:49,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755991609] [2022-01-30 23:16:49,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:16:49,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-30 23:16:49,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:16:49,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-30 23:16:49,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2388, Invalid=6168, Unknown=0, NotChecked=0, Total=8556 [2022-01-30 23:16:49,955 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:16:52,807 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2022-01-30 23:16:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-30 23:16:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 278 [2022-01-30 23:16:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:16:52,809 INFO L225 Difference]: With dead ends: 336 [2022-01-30 23:16:52,809 INFO L226 Difference]: Without dead ends: 248 [2022-01-30 23:16:52,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7158, Invalid=26148, Unknown=0, NotChecked=0, Total=33306 [2022-01-30 23:16:52,813 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 23:16:52,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 80 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 23:16:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-30 23:16:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-01-30 23:16:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:16:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2022-01-30 23:16:52,821 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 278 [2022-01-30 23:16:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:16:52,821 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2022-01-30 23:16:52,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:16:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2022-01-30 23:16:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-01-30 23:16:52,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:16:52,823 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:16:52,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 23:16:53,031 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,SelfDestructingSolverStorable13 [2022-01-30 23:16:53,031 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:16:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:16:53,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1645049456, now seen corresponding path program 11 times [2022-01-30 23:16:53,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:16:53,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145652303] [2022-01-30 23:16:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:16:53,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:16:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:54,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:16:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:54,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-30 23:16:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:54,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-30 23:16:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:54,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2022-01-30 23:16:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:16:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12379 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8779 trivial. 0 not checked. [2022-01-30 23:16:54,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:16:54,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145652303] [2022-01-30 23:16:54,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145652303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:16:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988891559] [2022-01-30 23:16:54,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 23:16:54,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:16:54,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:16:54,344 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:16:54,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process