/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/loops-crafted-1/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 03:21:29,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 03:21:29,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 03:21:29,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 03:21:29,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 03:21:29,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 03:21:29,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 03:21:29,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 03:21:29,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 03:21:29,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 03:21:29,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 03:21:29,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 03:21:29,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 03:21:29,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 03:21:29,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 03:21:29,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 03:21:29,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 03:21:29,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 03:21:29,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 03:21:29,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 03:21:29,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 03:21:29,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-01-31 03:21:29,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 03:21:29,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 03:21:29,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 03:21:29,739 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 [2022-01-31 03:21:29,759 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 03:21:29,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 03:21:29,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 03:21:29,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 03:21:29,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 03:21:29,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 03:21:29,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 03:21:29,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 03:21:29,762 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 03:21:29,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 03:21:29,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 03:21:29,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 03:21:29,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 03:21:29,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 03:21:29,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 03:21:29,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 03:21:29,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 03:21:29,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 03:21:29,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 03:21:29,763 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 03:21:29,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 03:21:29,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 03:21:29,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 03:21:29,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 03:21:29,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 03:21:29,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 03:21:29,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 03:21:29,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 03:21:29,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 03:21:29,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 03:21:29,765 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 03:21:29,765 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 03:21:29,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 03:21:29,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 03:21:29,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 03:21:30,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 03:21:30,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 03:21:30,010 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 03:21:30,011 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 03:21:30,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-01-31 03:21:30,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/257940662/b3f961fbfa9c4e169458dda999ed554e/FLAGb76dc7dec [2022-01-31 03:21:30,505 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 03:21:30,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-01-31 03:21:30,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/257940662/b3f961fbfa9c4e169458dda999ed554e/FLAGb76dc7dec [2022-01-31 03:21:30,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/257940662/b3f961fbfa9c4e169458dda999ed554e [2022-01-31 03:21:30,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 03:21:30,904 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 03:21:30,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 03:21:30,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 03:21:30,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 03:21:30,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:21:30" (1/1) ... [2022-01-31 03:21:30,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@491607d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:30, skipping insertion in model container [2022-01-31 03:21:30,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:21:30" (1/1) ... [2022-01-31 03:21:30,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 03:21:30,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 03:21:31,111 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-01-31 03:21:31,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 03:21:31,156 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 03:21:31,171 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-01-31 03:21:31,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 03:21:31,200 INFO L208 MainTranslator]: Completed translation [2022-01-31 03:21:31,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31 WrapperNode [2022-01-31 03:21:31,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 03:21:31,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 03:21:31,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 03:21:31,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 03:21:31,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31" (1/1) ... [2022-01-31 03:21:31,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31" (1/1) ... [2022-01-31 03:21:31,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31" (1/1) ... [2022-01-31 03:21:31,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31" (1/1) ... [2022-01-31 03:21:31,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31" (1/1) ... [2022-01-31 03:21:31,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31" (1/1) ... [2022-01-31 03:21:31,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31" (1/1) ... [2022-01-31 03:21:31,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 03:21:31,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 03:21:31,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 03:21:31,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 03:21:31,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31" (1/1) ... [2022-01-31 03:21:31,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 03:21:31,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:31,268 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) [2022-01-31 03:21:31,295 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 [2022-01-31 03:21:31,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 03:21:31,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 03:21:31,308 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 03:21:31,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 03:21:31,309 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-01-31 03:21:31,310 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-01-31 03:21:31,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 03:21:31,310 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 03:21:31,310 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 03:21:31,310 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 03:21:31,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 03:21:31,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 03:21:31,372 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 03:21:31,374 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 03:21:31,510 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 03:21:31,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 03:21:31,516 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 03:21:31,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:21:31 BoogieIcfgContainer [2022-01-31 03:21:31,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 03:21:31,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 03:21:31,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 03:21:31,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 03:21:31,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 03:21:30" (1/3) ... [2022-01-31 03:21:31,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4554cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:21:31, skipping insertion in model container [2022-01-31 03:21:31,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:21:31" (2/3) ... [2022-01-31 03:21:31,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4554cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:21:31, skipping insertion in model container [2022-01-31 03:21:31,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:21:31" (3/3) ... [2022-01-31 03:21:31,525 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2022-01-31 03:21:31,529 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 03:21:31,529 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 03:21:31,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 03:21:31,607 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 [2022-01-31 03:21:31,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 03:21:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 03:21:31,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 03:21:31,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:31,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:31,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:31,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:31,643 INFO L85 PathProgramCache]: Analyzing trace with hash 345664661, now seen corresponding path program 1 times [2022-01-31 03:21:31,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:31,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235129759] [2022-01-31 03:21:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:31,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:31,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 03:21:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:32,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:32,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235129759] [2022-01-31 03:21:32,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235129759] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:21:32,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:21:32,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 03:21:32,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343343035] [2022-01-31 03:21:32,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:21:32,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 03:21:32,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:32,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 03:21:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-01-31 03:21:32,153 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:32,718 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-01-31 03:21:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 03:21:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-01-31 03:21:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:32,736 INFO L225 Difference]: With dead ends: 91 [2022-01-31 03:21:32,736 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 03:21:32,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-31 03:21:32,743 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:32,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 89 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:21:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 03:21:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-01-31 03:21:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 03:21:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-01-31 03:21:32,774 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2022-01-31 03:21:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:32,774 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-01-31 03:21:32,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-01-31 03:21:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 03:21:32,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:32,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:32,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 03:21:32,777 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1324779677, now seen corresponding path program 1 times [2022-01-31 03:21:32,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:32,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951288172] [2022-01-31 03:21:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:32,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 03:21:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:32,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:32,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951288172] [2022-01-31 03:21:32,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951288172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:21:32,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:21:32,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 03:21:32,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377423981] [2022-01-31 03:21:32,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:21:32,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 03:21:32,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 03:21:32,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 03:21:32,840 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 03:21:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:32,910 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-01-31 03:21:32,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 03:21:32,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-01-31 03:21:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:32,911 INFO L225 Difference]: With dead ends: 55 [2022-01-31 03:21:32,912 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 03:21:32,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 03:21:32,913 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:32,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 03:21:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 03:21:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 03:21:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 03:21:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-01-31 03:21:32,922 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2022-01-31 03:21:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:32,923 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-01-31 03:21:32,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 03:21:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-01-31 03:21:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 03:21:32,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:32,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:32,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 03:21:32,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:32,925 INFO L85 PathProgramCache]: Analyzing trace with hash -855151641, now seen corresponding path program 1 times [2022-01-31 03:21:32,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:32,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36796262] [2022-01-31 03:21:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:32,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 03:21:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:32,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:32,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36796262] [2022-01-31 03:21:32,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36796262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:21:32,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:21:32,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 03:21:32,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457941782] [2022-01-31 03:21:32,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:21:32,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 03:21:32,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:32,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 03:21:32,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 03:21:32,988 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:33,051 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-01-31 03:21:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 03:21:33,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-01-31 03:21:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:33,053 INFO L225 Difference]: With dead ends: 72 [2022-01-31 03:21:33,053 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 03:21:33,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 03:21:33,054 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:33,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 03:21:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 03:21:33,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-01-31 03:21:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 03:21:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-01-31 03:21:33,065 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2022-01-31 03:21:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:33,065 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-01-31 03:21:33,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-01-31 03:21:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 03:21:33,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:33,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:33,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 03:21:33,067 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash 743790053, now seen corresponding path program 1 times [2022-01-31 03:21:33,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:33,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015533037] [2022-01-31 03:21:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:33,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 03:21:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:33,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:33,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015533037] [2022-01-31 03:21:33,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015533037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:33,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271005280] [2022-01-31 03:21:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:33,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:33,134 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) [2022-01-31 03:21:33,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 03:21:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 03:21:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 03:21:33,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 03:21:33,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271005280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:21:33,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 03:21:33,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-01-31 03:21:33,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794613311] [2022-01-31 03:21:33,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:21:33,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 03:21:33,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:33,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 03:21:33,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-31 03:21:33,479 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:33,567 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-01-31 03:21:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 03:21:33,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-01-31 03:21:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:33,569 INFO L225 Difference]: With dead ends: 56 [2022-01-31 03:21:33,569 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 03:21:33,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-31 03:21:33,571 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:33,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 129 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:21:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 03:21:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-01-31 03:21:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 03:21:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-01-31 03:21:33,578 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2022-01-31 03:21:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:33,578 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-01-31 03:21:33,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-01-31 03:21:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 03:21:33,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:33,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:33,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:33,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:33,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:33,804 INFO L85 PathProgramCache]: Analyzing trace with hash 198429957, now seen corresponding path program 1 times [2022-01-31 03:21:33,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:33,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887530824] [2022-01-31 03:21:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:33,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 03:21:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:33,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887530824] [2022-01-31 03:21:33,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887530824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216642353] [2022-01-31 03:21:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:33,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:33,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:33,865 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) [2022-01-31 03:21:33,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 03:21:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:33,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 03:21:33,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:33,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216642353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:34,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:34,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-31 03:21:34,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95309743] [2022-01-31 03:21:34,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:34,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 03:21:34,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:34,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 03:21:34,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 03:21:34,070 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 03:21:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:34,165 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-01-31 03:21:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 03:21:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-01-31 03:21:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:34,166 INFO L225 Difference]: With dead ends: 74 [2022-01-31 03:21:34,166 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 03:21:34,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 03:21:34,168 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:34,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:21:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 03:21:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-01-31 03:21:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 03:21:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-01-31 03:21:34,175 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2022-01-31 03:21:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:34,175 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-01-31 03:21:34,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 03:21:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-01-31 03:21:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 03:21:34,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:34,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:34,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:34,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:34,402 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:34,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash -921936221, now seen corresponding path program 2 times [2022-01-31 03:21:34,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:34,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766891032] [2022-01-31 03:21:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:34,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:34,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:34,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 03:21:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 03:21:34,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:34,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766891032] [2022-01-31 03:21:34,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766891032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:21:34,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:21:34,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 03:21:34,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443451059] [2022-01-31 03:21:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:21:34,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 03:21:34,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 03:21:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 03:21:34,546 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:34,713 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-01-31 03:21:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 03:21:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-01-31 03:21:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:34,718 INFO L225 Difference]: With dead ends: 53 [2022-01-31 03:21:34,718 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 03:21:34,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 03:21:34,723 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:34,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:21:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 03:21:34,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 03:21:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 03:21:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-01-31 03:21:34,763 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 31 [2022-01-31 03:21:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:34,764 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-01-31 03:21:34,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-01-31 03:21:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 03:21:34,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:34,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:34,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 03:21:34,765 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1006640075, now seen corresponding path program 1 times [2022-01-31 03:21:34,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:34,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610246903] [2022-01-31 03:21:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:34,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:34,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:34,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:34,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 03:21:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 03:21:34,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:34,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610246903] [2022-01-31 03:21:34,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610246903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:34,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869053344] [2022-01-31 03:21:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:34,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:34,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:34,886 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) [2022-01-31 03:21:34,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 03:21:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:34,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 03:21:34,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 03:21:35,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 03:21:35,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869053344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:35,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:35,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-01-31 03:21:35,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207939300] [2022-01-31 03:21:35,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:35,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 03:21:35,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 03:21:35,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-31 03:21:35,080 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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) [2022-01-31 03:21:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:35,242 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-01-31 03:21:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 03:21:35,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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 35 [2022-01-31 03:21:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:35,244 INFO L225 Difference]: With dead ends: 73 [2022-01-31 03:21:35,244 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 03:21:35,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-31 03:21:35,245 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:35,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:21:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 03:21:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 03:21:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 03:21:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-01-31 03:21:35,252 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-01-31 03:21:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:35,252 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-01-31 03:21:35,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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) [2022-01-31 03:21:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-01-31 03:21:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 03:21:35,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:35,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:35,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:35,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:35,467 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1072065907, now seen corresponding path program 1 times [2022-01-31 03:21:35,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:35,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035971122] [2022-01-31 03:21:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:35,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:35,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:35,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:35,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 03:21:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 03:21:35,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:35,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035971122] [2022-01-31 03:21:35,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035971122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:35,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176566323] [2022-01-31 03:21:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:35,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:35,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:35,542 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) [2022-01-31 03:21:35,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 03:21:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:35,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 03:21:35,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 03:21:35,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 03:21:35,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176566323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:35,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:35,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-01-31 03:21:35,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810118498] [2022-01-31 03:21:35,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:35,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 03:21:35,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:35,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 03:21:35,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-31 03:21:35,804 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 03:21:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:35,976 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-01-31 03:21:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 03:21:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-01-31 03:21:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:35,977 INFO L225 Difference]: With dead ends: 65 [2022-01-31 03:21:35,977 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 03:21:35,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-01-31 03:21:35,978 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:35,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:21:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 03:21:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-01-31 03:21:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 03:21:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-01-31 03:21:35,985 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 37 [2022-01-31 03:21:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:35,985 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-01-31 03:21:35,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 03:21:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-01-31 03:21:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 03:21:35,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:35,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:36,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:36,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:36,187 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1752124277, now seen corresponding path program 1 times [2022-01-31 03:21:36,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:36,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718591872] [2022-01-31 03:21:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:36,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:36,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:36,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:36,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 03:21:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 03:21:36,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:36,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718591872] [2022-01-31 03:21:36,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718591872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:21:36,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:21:36,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 03:21:36,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683043390] [2022-01-31 03:21:36,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:21:36,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 03:21:36,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 03:21:36,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-01-31 03:21:36,293 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:36,551 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-01-31 03:21:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 03:21:36,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-01-31 03:21:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:36,552 INFO L225 Difference]: With dead ends: 60 [2022-01-31 03:21:36,552 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 03:21:36,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-31 03:21:36,553 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:36,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:21:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 03:21:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-01-31 03:21:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-01-31 03:21:36,566 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 37 [2022-01-31 03:21:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:36,568 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-01-31 03:21:36,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-01-31 03:21:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 03:21:36,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:36,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:36,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 03:21:36,573 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2030931829, now seen corresponding path program 2 times [2022-01-31 03:21:36,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:36,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573060513] [2022-01-31 03:21:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:36,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:36,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:36,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:36,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 03:21:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:36,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:36,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573060513] [2022-01-31 03:21:36,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573060513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:36,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493389171] [2022-01-31 03:21:36,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:21:36,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:36,750 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) [2022-01-31 03:21:36,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 03:21:36,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:21:36,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:36,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 03:21:36,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:37,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:37,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493389171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:37,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:37,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-01-31 03:21:37,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69226378] [2022-01-31 03:21:37,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:37,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 03:21:37,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 03:21:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-01-31 03:21:37,712 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:38,084 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-01-31 03:21:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 03:21:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-01-31 03:21:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:38,086 INFO L225 Difference]: With dead ends: 67 [2022-01-31 03:21:38,086 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 03:21:38,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 03:21:38,088 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:38,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 67 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 03:21:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-01-31 03:21:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-01-31 03:21:38,096 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 39 [2022-01-31 03:21:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:38,098 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-01-31 03:21:38,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-01-31 03:21:38,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 03:21:38,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:38,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:38,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:38,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 03:21:38,316 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:38,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:38,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1514673707, now seen corresponding path program 2 times [2022-01-31 03:21:38,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:38,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813511076] [2022-01-31 03:21:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:38,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:38,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:38,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 03:21:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:38,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:38,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813511076] [2022-01-31 03:21:38,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813511076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:38,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164141698] [2022-01-31 03:21:38,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:21:38,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:38,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:38,502 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) [2022-01-31 03:21:38,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 03:21:38,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:21:38,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:38,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 03:21:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:38,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:39,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164141698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:39,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:39,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-01-31 03:21:39,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903008834] [2022-01-31 03:21:39,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:39,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 03:21:39,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 03:21:39,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-01-31 03:21:39,285 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:39,657 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-01-31 03:21:39,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 03:21:39,657 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-01-31 03:21:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:39,658 INFO L225 Difference]: With dead ends: 61 [2022-01-31 03:21:39,658 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 03:21:39,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 03:21:39,659 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:39,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 75 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:39,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 03:21:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-31 03:21:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-01-31 03:21:39,664 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 39 [2022-01-31 03:21:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:39,664 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-01-31 03:21:39,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-01-31 03:21:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 03:21:39,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:39,665 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:39,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:39,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:39,866 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:39,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1355746345, now seen corresponding path program 3 times [2022-01-31 03:21:39,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:39,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971637572] [2022-01-31 03:21:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:39,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:39,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:39,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:39,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 03:21:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:40,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971637572] [2022-01-31 03:21:40,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971637572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595547484] [2022-01-31 03:21:40,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:21:40,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:40,070 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) [2022-01-31 03:21:40,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 03:21:40,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 03:21:40,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 03:21:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:40,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:41,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595547484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:41,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:41,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-01-31 03:21:41,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216484390] [2022-01-31 03:21:41,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:41,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 03:21:41,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:41,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 03:21:41,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 03:21:41,174 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:41,801 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-01-31 03:21:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 03:21:41,801 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-01-31 03:21:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:41,802 INFO L225 Difference]: With dead ends: 74 [2022-01-31 03:21:41,802 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 03:21:41,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 03:21:41,804 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:41,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:21:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 03:21:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-01-31 03:21:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-01-31 03:21:41,810 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2022-01-31 03:21:41,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:41,810 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-01-31 03:21:41,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:41,810 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-01-31 03:21:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 03:21:41,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:41,811 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:41,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:42,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:42,027 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2125149075, now seen corresponding path program 3 times [2022-01-31 03:21:42,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:42,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160525779] [2022-01-31 03:21:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:42,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:42,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:42,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:42,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 03:21:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:42,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160525779] [2022-01-31 03:21:42,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160525779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747080825] [2022-01-31 03:21:42,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:21:42,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:42,212 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) [2022-01-31 03:21:42,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 03:21:42,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 03:21:42,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:42,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 03:21:42,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:42,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:43,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747080825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:43,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:43,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-01-31 03:21:43,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445458757] [2022-01-31 03:21:43,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:43,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 03:21:43,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 03:21:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 03:21:43,109 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:43,642 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-01-31 03:21:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 03:21:43,643 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-01-31 03:21:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:43,643 INFO L225 Difference]: With dead ends: 69 [2022-01-31 03:21:43,643 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 03:21:43,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 03:21:43,645 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:43,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 80 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 03:21:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-01-31 03:21:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-01-31 03:21:43,650 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2022-01-31 03:21:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:43,651 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-01-31 03:21:43,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-01-31 03:21:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 03:21:43,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:43,651 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:43,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:43,863 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,SelfDestructingSolverStorable12 [2022-01-31 03:21:43,864 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash 431574421, now seen corresponding path program 4 times [2022-01-31 03:21:43,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403644223] [2022-01-31 03:21:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:43,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:43,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:43,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:43,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 03:21:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:44,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:44,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403644223] [2022-01-31 03:21:44,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403644223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:44,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088674849] [2022-01-31 03:21:44,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:21:44,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:44,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:44,068 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) [2022-01-31 03:21:44,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 03:21:44,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:21:44,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:44,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 03:21:44,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:44,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:44,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088674849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:44,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:44,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-01-31 03:21:44,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24651467] [2022-01-31 03:21:44,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:44,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 03:21:44,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:44,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 03:21:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 03:21:44,907 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:45,368 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-01-31 03:21:45,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 03:21:45,368 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-01-31 03:21:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:45,369 INFO L225 Difference]: With dead ends: 71 [2022-01-31 03:21:45,369 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 03:21:45,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 03:21:45,370 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:45,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 92 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 03:21:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-01-31 03:21:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-31 03:21:45,376 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 43 [2022-01-31 03:21:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:45,376 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-31 03:21:45,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-31 03:21:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 03:21:45,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:45,377 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:45,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:45,583 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,SelfDestructingSolverStorable13 [2022-01-31 03:21:45,583 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:45,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1007286155, now seen corresponding path program 4 times [2022-01-31 03:21:45,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:45,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377044941] [2022-01-31 03:21:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:45,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:45,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:45,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:45,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 03:21:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:45,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377044941] [2022-01-31 03:21:45,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377044941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565577916] [2022-01-31 03:21:45,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:21:45,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:45,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:45,791 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) [2022-01-31 03:21:45,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 03:21:45,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:21:45,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:45,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 03:21:45,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:46,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:46,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565577916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:46,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:46,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-01-31 03:21:46,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930850378] [2022-01-31 03:21:46,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:46,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 03:21:46,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:46,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 03:21:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 03:21:46,590 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:47,046 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-01-31 03:21:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 03:21:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-01-31 03:21:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:47,047 INFO L225 Difference]: With dead ends: 65 [2022-01-31 03:21:47,047 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 03:21:47,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 03:21:47,049 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:47,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 90 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 03:21:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-31 03:21:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-01-31 03:21:47,053 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 43 [2022-01-31 03:21:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:47,053 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-01-31 03:21:47,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-01-31 03:21:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 03:21:47,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:47,054 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:47,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:47,254 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,SelfDestructingSolverStorable14 [2022-01-31 03:21:47,254 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:47,255 INFO L85 PathProgramCache]: Analyzing trace with hash 912386679, now seen corresponding path program 5 times [2022-01-31 03:21:47,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:47,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030199044] [2022-01-31 03:21:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:47,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:47,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:47,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:47,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 03:21:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:47,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:47,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030199044] [2022-01-31 03:21:47,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030199044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:47,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435947155] [2022-01-31 03:21:47,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:21:47,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:47,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:47,496 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) [2022-01-31 03:21:47,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 03:21:47,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 03:21:47,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:47,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 03:21:47,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:47,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:48,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435947155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:48,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:48,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-01-31 03:21:48,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059399156] [2022-01-31 03:21:48,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:48,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 03:21:48,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 03:21:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 03:21:48,528 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:49,058 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-01-31 03:21:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 03:21:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-01-31 03:21:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:49,059 INFO L225 Difference]: With dead ends: 78 [2022-01-31 03:21:49,059 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 03:21:49,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 03:21:49,061 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:49,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 62 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 03:21:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-01-31 03:21:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-01-31 03:21:49,066 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 45 [2022-01-31 03:21:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:49,067 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-01-31 03:21:49,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-01-31 03:21:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 03:21:49,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:49,068 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:49,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:49,275 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,SelfDestructingSolverStorable15 [2022-01-31 03:21:49,275 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash 294367923, now seen corresponding path program 5 times [2022-01-31 03:21:49,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:49,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436240452] [2022-01-31 03:21:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:49,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:49,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:49,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:49,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 03:21:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:49,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:49,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436240452] [2022-01-31 03:21:49,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436240452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:49,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867403655] [2022-01-31 03:21:49,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:21:49,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:49,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:49,520 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) [2022-01-31 03:21:49,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 03:21:49,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 03:21:49,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:49,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 03:21:49,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:49,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:50,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867403655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:50,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:50,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-01-31 03:21:50,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753854701] [2022-01-31 03:21:50,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:50,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 03:21:50,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:50,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 03:21:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 03:21:50,520 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:51,065 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-01-31 03:21:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 03:21:51,066 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-01-31 03:21:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:51,067 INFO L225 Difference]: With dead ends: 73 [2022-01-31 03:21:51,067 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 03:21:51,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 03:21:51,069 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:51,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 90 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:51,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 03:21:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-01-31 03:21:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-01-31 03:21:51,080 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 45 [2022-01-31 03:21:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:51,080 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-01-31 03:21:51,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-01-31 03:21:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 03:21:51,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:51,081 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:51,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:51,298 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,SelfDestructingSolverStorable16 [2022-01-31 03:21:51,298 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:51,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1987478709, now seen corresponding path program 6 times [2022-01-31 03:21:51,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:51,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658211328] [2022-01-31 03:21:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:51,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:51,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 03:21:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:51,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658211328] [2022-01-31 03:21:51,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658211328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836253959] [2022-01-31 03:21:51,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:21:51,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:51,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:51,501 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) [2022-01-31 03:21:51,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 03:21:51,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 03:21:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 03:21:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:51,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:52,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836253959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:52,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:52,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-01-31 03:21:52,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370882215] [2022-01-31 03:21:52,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:52,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 03:21:52,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 03:21:52,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 03:21:52,431 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:52,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:52,842 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-01-31 03:21:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 03:21:52,843 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-01-31 03:21:52,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:52,843 INFO L225 Difference]: With dead ends: 75 [2022-01-31 03:21:52,843 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 03:21:52,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 03:21:52,845 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:52,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 67 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 03:21:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-01-31 03:21:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-01-31 03:21:52,850 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2022-01-31 03:21:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:52,850 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-01-31 03:21:52,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-01-31 03:21:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 03:21:52,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:52,851 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:52,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:53,076 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,SelfDestructingSolverStorable17 [2022-01-31 03:21:53,076 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:53,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2094039019, now seen corresponding path program 6 times [2022-01-31 03:21:53,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:53,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752437370] [2022-01-31 03:21:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:53,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:53,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:53,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:53,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 03:21:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:53,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752437370] [2022-01-31 03:21:53,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752437370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:53,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927867791] [2022-01-31 03:21:53,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:21:53,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:53,314 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) [2022-01-31 03:21:53,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 03:21:53,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 03:21:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 03:21:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:53,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:54,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927867791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:54,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:54,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-01-31 03:21:54,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588305663] [2022-01-31 03:21:54,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:54,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 03:21:54,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 03:21:54,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 03:21:54,165 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:54,658 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-01-31 03:21:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 03:21:54,659 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-01-31 03:21:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:54,659 INFO L225 Difference]: With dead ends: 69 [2022-01-31 03:21:54,659 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 03:21:54,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 03:21:54,661 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:54,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 100 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 03:21:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-31 03:21:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-01-31 03:21:54,666 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 47 [2022-01-31 03:21:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:54,666 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-01-31 03:21:54,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-01-31 03:21:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 03:21:54,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:54,667 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:54,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:54,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:54,887 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:54,888 INFO L85 PathProgramCache]: Analyzing trace with hash 219937303, now seen corresponding path program 7 times [2022-01-31 03:21:54,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:54,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790407958] [2022-01-31 03:21:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:54,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:54,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:54,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:55,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 03:21:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:55,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:55,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790407958] [2022-01-31 03:21:55,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790407958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:55,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520616423] [2022-01-31 03:21:55,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:21:55,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:55,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:55,144 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:21:55,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 03:21:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 03:21:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:55,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:56,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520616423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:56,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:56,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-01-31 03:21:56,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408055603] [2022-01-31 03:21:56,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:56,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 03:21:56,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 03:21:56,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 03:21:56,171 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:56,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:56,766 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-01-31 03:21:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 03:21:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-01-31 03:21:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:56,767 INFO L225 Difference]: With dead ends: 82 [2022-01-31 03:21:56,767 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 03:21:56,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 03:21:56,769 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:56,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 97 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 03:21:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-01-31 03:21:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-01-31 03:21:56,774 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 49 [2022-01-31 03:21:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:56,774 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-01-31 03:21:56,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-01-31 03:21:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 03:21:56,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:56,775 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:56,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:56,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:56,984 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -969594157, now seen corresponding path program 7 times [2022-01-31 03:21:56,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:56,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120867180] [2022-01-31 03:21:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:56,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:57,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:57,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:57,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 03:21:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:57,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:57,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120867180] [2022-01-31 03:21:57,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120867180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:57,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949589187] [2022-01-31 03:21:57,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:21:57,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:57,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:57,230 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:21:57,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 03:21:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:57,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 03:21:57,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:57,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:21:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:58,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949589187] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:21:58,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:21:58,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-01-31 03:21:58,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643925167] [2022-01-31 03:21:58,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:21:58,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 03:21:58,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:21:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 03:21:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 03:21:58,227 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:21:58,796 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-01-31 03:21:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 03:21:58,796 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-01-31 03:21:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:21:58,797 INFO L225 Difference]: With dead ends: 77 [2022-01-31 03:21:58,797 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 03:21:58,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 03:21:58,798 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 146 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:21:58,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 80 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:21:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 03:21:58,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-01-31 03:21:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:21:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-01-31 03:21:58,804 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2022-01-31 03:21:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:21:58,804 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-01-31 03:21:58,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:21:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-01-31 03:21:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 03:21:58,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:21:58,805 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:21:58,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 03:21:59,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:59,028 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:21:59,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:21:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1499302699, now seen corresponding path program 8 times [2022-01-31 03:21:59,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:21:59,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593420725] [2022-01-31 03:21:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:21:59,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:21:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:59,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:21:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:59,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:21:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:59,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 03:21:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:21:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:59,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:21:59,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593420725] [2022-01-31 03:21:59,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593420725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:21:59,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858716704] [2022-01-31 03:21:59,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:21:59,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:21:59,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:21:59,253 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:21:59,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 03:21:59,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:21:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:21:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 03:21:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:21:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:21:59,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:00,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858716704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:00,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:00,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-01-31 03:22:00,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376099945] [2022-01-31 03:22:00,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:00,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 03:22:00,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 03:22:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 03:22:00,235 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:00,793 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-01-31 03:22:00,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 03:22:00,795 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-01-31 03:22:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:00,795 INFO L225 Difference]: With dead ends: 79 [2022-01-31 03:22:00,795 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 03:22:00,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 03:22:00,797 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:00,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 87 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:00,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 03:22:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-01-31 03:22:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-01-31 03:22:00,802 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 51 [2022-01-31 03:22:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:00,802 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-01-31 03:22:00,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-01-31 03:22:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 03:22:00,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:00,803 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:00,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:01,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:01,011 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:01,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1741263029, now seen corresponding path program 8 times [2022-01-31 03:22:01,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:01,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943412183] [2022-01-31 03:22:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:01,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:01,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:01,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:01,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 03:22:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:01,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943412183] [2022-01-31 03:22:01,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943412183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312929031] [2022-01-31 03:22:01,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:22:01,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:01,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:01,252 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:01,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 03:22:01,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:22:01,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 03:22:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:01,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:02,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312929031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:02,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:02,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-01-31 03:22:02,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923190834] [2022-01-31 03:22:02,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:02,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 03:22:02,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 03:22:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 03:22:02,206 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:02,676 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-01-31 03:22:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 03:22:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-01-31 03:22:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:02,677 INFO L225 Difference]: With dead ends: 73 [2022-01-31 03:22:02,677 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 03:22:02,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 03:22:02,678 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:02,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 85 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 03:22:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-31 03:22:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-01-31 03:22:02,683 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 51 [2022-01-31 03:22:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:02,684 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-01-31 03:22:02,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-01-31 03:22:02,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 03:22:02,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:02,684 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:02,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-31 03:22:02,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:02,899 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash 863265463, now seen corresponding path program 9 times [2022-01-31 03:22:02,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:02,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976189604] [2022-01-31 03:22:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:02,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:02,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:03,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 03:22:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:03,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:03,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976189604] [2022-01-31 03:22:03,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976189604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:03,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131209909] [2022-01-31 03:22:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:22:03,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:03,176 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:03,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 03:22:03,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 03:22:03,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 03:22:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:03,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:04,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131209909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:04,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:04,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-01-31 03:22:04,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387905422] [2022-01-31 03:22:04,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:04,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 03:22:04,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:04,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 03:22:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 03:22:04,303 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:04,927 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-01-31 03:22:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 03:22:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-01-31 03:22:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:04,928 INFO L225 Difference]: With dead ends: 86 [2022-01-31 03:22:04,928 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 03:22:04,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 03:22:04,930 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:04,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 87 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 03:22:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2022-01-31 03:22:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-01-31 03:22:04,936 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 53 [2022-01-31 03:22:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:04,936 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-01-31 03:22:04,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-01-31 03:22:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 03:22:04,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:04,937 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:04,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:05,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:05,140 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash 205839347, now seen corresponding path program 9 times [2022-01-31 03:22:05,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:05,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087997117] [2022-01-31 03:22:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:05,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:05,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:05,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:05,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 03:22:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:05,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:05,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087997117] [2022-01-31 03:22:05,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087997117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50082772] [2022-01-31 03:22:05,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:22:05,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:05,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:05,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:05,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 03:22:05,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 03:22:05,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 03:22:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:05,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:06,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50082772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:06,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:06,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-01-31 03:22:06,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367153207] [2022-01-31 03:22:06,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:06,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 03:22:06,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 03:22:06,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 03:22:06,521 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:07,132 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-01-31 03:22:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 03:22:07,133 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-01-31 03:22:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:07,133 INFO L225 Difference]: With dead ends: 81 [2022-01-31 03:22:07,133 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 03:22:07,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 03:22:07,135 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:07,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 95 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 03:22:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-01-31 03:22:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-01-31 03:22:07,140 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2022-01-31 03:22:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:07,140 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-01-31 03:22:07,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-01-31 03:22:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 03:22:07,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:07,141 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:07,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:07,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-31 03:22:07,361 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:07,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:07,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1484104203, now seen corresponding path program 10 times [2022-01-31 03:22:07,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:07,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711224689] [2022-01-31 03:22:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:07,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:07,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:07,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:07,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 03:22:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:07,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711224689] [2022-01-31 03:22:07,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711224689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73601924] [2022-01-31 03:22:07,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:22:07,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:07,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:07,589 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:07,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 03:22:07,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:22:07,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:07,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 03:22:07,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:07,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:08,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73601924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:08,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:08,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-01-31 03:22:08,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328149513] [2022-01-31 03:22:08,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:08,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 03:22:08,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:08,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 03:22:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 03:22:08,690 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:09,219 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-01-31 03:22:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 03:22:09,221 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-01-31 03:22:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:09,222 INFO L225 Difference]: With dead ends: 83 [2022-01-31 03:22:09,222 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 03:22:09,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 03:22:09,224 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:09,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 87 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 03:22:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-01-31 03:22:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-01-31 03:22:09,231 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 55 [2022-01-31 03:22:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:09,231 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-01-31 03:22:09,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-01-31 03:22:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 03:22:09,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:09,231 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:09,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:09,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-31 03:22:09,432 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1172735403, now seen corresponding path program 10 times [2022-01-31 03:22:09,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:09,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581734972] [2022-01-31 03:22:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:09,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:09,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:09,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:09,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 03:22:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:09,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:09,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581734972] [2022-01-31 03:22:09,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581734972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:09,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191802491] [2022-01-31 03:22:09,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:22:09,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:09,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:09,686 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:09,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 03:22:09,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:22:09,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:09,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 03:22:09,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:10,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:10,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191802491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:10,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:10,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-01-31 03:22:10,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641309873] [2022-01-31 03:22:10,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:10,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 03:22:10,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:10,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 03:22:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 03:22:10,703 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:11,239 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-01-31 03:22:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 03:22:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-01-31 03:22:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:11,240 INFO L225 Difference]: With dead ends: 77 [2022-01-31 03:22:11,240 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 03:22:11,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 03:22:11,242 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:11,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 95 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 03:22:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-01-31 03:22:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-01-31 03:22:11,248 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 55 [2022-01-31 03:22:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:11,248 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-01-31 03:22:11,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-01-31 03:22:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 03:22:11,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:11,249 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:11,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:11,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 03:22:11,471 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash 829449303, now seen corresponding path program 11 times [2022-01-31 03:22:11,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600561851] [2022-01-31 03:22:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:11,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:11,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:11,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:11,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 03:22:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:11,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600561851] [2022-01-31 03:22:11,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600561851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:11,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770589577] [2022-01-31 03:22:11,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:22:11,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:11,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:11,734 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:11,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 03:22:11,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 03:22:11,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:11,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 03:22:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:12,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:12,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770589577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:12,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:12,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-01-31 03:22:12,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963356033] [2022-01-31 03:22:12,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:12,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 03:22:12,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:12,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 03:22:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 03:22:12,918 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:13,632 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-01-31 03:22:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 03:22:13,633 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-01-31 03:22:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:13,634 INFO L225 Difference]: With dead ends: 90 [2022-01-31 03:22:13,634 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 03:22:13,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 03:22:13,635 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 173 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:13,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 82 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 03:22:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-01-31 03:22:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-01-31 03:22:13,643 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 57 [2022-01-31 03:22:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:13,644 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-01-31 03:22:13,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-01-31 03:22:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 03:22:13,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:13,644 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:13,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-31 03:22:13,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:13,851 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash 424150547, now seen corresponding path program 11 times [2022-01-31 03:22:13,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:13,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457736746] [2022-01-31 03:22:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:13,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:13,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:13,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 03:22:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:14,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:14,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457736746] [2022-01-31 03:22:14,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457736746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:14,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520936905] [2022-01-31 03:22:14,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:22:14,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:14,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:14,176 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:14,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 03:22:14,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 03:22:14,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:14,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 03:22:14,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:14,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:15,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520936905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:15,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:15,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-01-31 03:22:15,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308519235] [2022-01-31 03:22:15,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:15,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 03:22:15,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:15,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 03:22:15,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 03:22:15,329 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:16,039 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-01-31 03:22:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 03:22:16,039 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-01-31 03:22:16,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:16,040 INFO L225 Difference]: With dead ends: 85 [2022-01-31 03:22:16,040 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 03:22:16,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 03:22:16,041 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:16,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 90 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 03:22:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-01-31 03:22:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-01-31 03:22:16,047 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 57 [2022-01-31 03:22:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:16,047 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-01-31 03:22:16,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-01-31 03:22:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 03:22:16,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:16,048 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:16,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-31 03:22:16,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 03:22:16,251 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2140438507, now seen corresponding path program 12 times [2022-01-31 03:22:16,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:16,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092886863] [2022-01-31 03:22:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:16,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:16,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:16,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:16,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 03:22:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:16,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:16,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092886863] [2022-01-31 03:22:16,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092886863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:16,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440128493] [2022-01-31 03:22:16,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:22:16,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:16,559 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:16,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 03:22:16,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-31 03:22:16,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:16,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 03:22:16,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:17,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:17,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440128493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:17,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:17,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-01-31 03:22:17,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424481341] [2022-01-31 03:22:17,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:17,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 03:22:17,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 03:22:17,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 03:22:17,692 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:18,277 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-01-31 03:22:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 03:22:18,278 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-01-31 03:22:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:18,278 INFO L225 Difference]: With dead ends: 87 [2022-01-31 03:22:18,278 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 03:22:18,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 03:22:18,280 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:18,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 77 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 03:22:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-01-31 03:22:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-01-31 03:22:18,287 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 59 [2022-01-31 03:22:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:18,287 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-01-31 03:22:18,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-01-31 03:22:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 03:22:18,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:18,288 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:18,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:18,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:18,499 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash 711228661, now seen corresponding path program 12 times [2022-01-31 03:22:18,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:18,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102716732] [2022-01-31 03:22:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:18,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:18,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:18,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:18,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 03:22:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:18,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:18,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102716732] [2022-01-31 03:22:18,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102716732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569309248] [2022-01-31 03:22:18,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:22:18,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:18,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:18,839 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:18,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 03:22:18,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-31 03:22:18,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 03:22:18,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:19,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:20,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569309248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:20,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:20,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-01-31 03:22:20,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377557323] [2022-01-31 03:22:20,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:20,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 03:22:20,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 03:22:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 03:22:20,073 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:20,677 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-01-31 03:22:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 03:22:20,677 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-01-31 03:22:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:20,677 INFO L225 Difference]: With dead ends: 81 [2022-01-31 03:22:20,678 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 03:22:20,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 03:22:20,679 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:20,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 85 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:20,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 03:22:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-31 03:22:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-01-31 03:22:20,686 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 59 [2022-01-31 03:22:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:20,686 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-01-31 03:22:20,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-01-31 03:22:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 03:22:20,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:20,687 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:20,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-31 03:22:20,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-01-31 03:22:20,899 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:20,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1157284105, now seen corresponding path program 13 times [2022-01-31 03:22:20,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:20,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285095012] [2022-01-31 03:22:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:20,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:20,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:20,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:21,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 03:22:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:21,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285095012] [2022-01-31 03:22:21,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285095012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409683231] [2022-01-31 03:22:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:22:21,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:21,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:21,225 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:21,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 03:22:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:21,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 03:22:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:21,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:22,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409683231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:22,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:22,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-01-31 03:22:22,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309380900] [2022-01-31 03:22:22,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:22,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 03:22:22,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 03:22:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 03:22:22,606 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:23,362 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-01-31 03:22:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 03:22:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-01-31 03:22:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:23,363 INFO L225 Difference]: With dead ends: 94 [2022-01-31 03:22:23,363 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 03:22:23,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3671 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 03:22:23,365 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:23,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 82 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:22:23,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 03:22:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2022-01-31 03:22:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-01-31 03:22:23,371 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2022-01-31 03:22:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:23,371 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-01-31 03:22:23,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-01-31 03:22:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 03:22:23,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:23,372 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:23,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-31 03:22:23,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:23,572 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:23,573 INFO L85 PathProgramCache]: Analyzing trace with hash 213641523, now seen corresponding path program 13 times [2022-01-31 03:22:23,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:23,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738720117] [2022-01-31 03:22:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:23,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:23,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:23,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:23,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 03:22:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:23,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:23,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738720117] [2022-01-31 03:22:23,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738720117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:23,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196953119] [2022-01-31 03:22:23,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:22:23,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:23,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:23,920 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:23,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-31 03:22:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:23,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 03:22:23,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:24,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:25,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196953119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:25,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:25,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-01-31 03:22:25,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873679722] [2022-01-31 03:22:25,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:25,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 03:22:25,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 03:22:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 03:22:25,229 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:25,919 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-01-31 03:22:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 03:22:25,920 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-01-31 03:22:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:25,920 INFO L225 Difference]: With dead ends: 89 [2022-01-31 03:22:25,920 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 03:22:25,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 03:22:25,921 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:25,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 75 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 03:22:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-01-31 03:22:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.09375) internal successors, (70), 66 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-01-31 03:22:25,929 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 61 [2022-01-31 03:22:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:25,929 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-01-31 03:22:25,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-01-31 03:22:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 03:22:25,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:25,930 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:25,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-31 03:22:26,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:26,153 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1718819637, now seen corresponding path program 14 times [2022-01-31 03:22:26,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579845977] [2022-01-31 03:22:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:26,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:26,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:26,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:26,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 03:22:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:26,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579845977] [2022-01-31 03:22:26,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579845977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713787032] [2022-01-31 03:22:26,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:22:26,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:26,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:26,459 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:26,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-31 03:22:26,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:22:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:26,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 03:22:26,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:26,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:27,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713787032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:27,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:27,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-01-31 03:22:27,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591247343] [2022-01-31 03:22:27,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:27,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 03:22:27,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 03:22:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 03:22:27,760 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:28,490 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-01-31 03:22:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 03:22:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-01-31 03:22:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:28,493 INFO L225 Difference]: With dead ends: 91 [2022-01-31 03:22:28,493 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 03:22:28,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3580 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 03:22:28,494 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:28,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 87 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:22:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 03:22:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-01-31 03:22:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-01-31 03:22:28,500 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2022-01-31 03:22:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:28,500 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-01-31 03:22:28,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-01-31 03:22:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 03:22:28,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:28,501 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:28,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-31 03:22:28,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:28,711 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:28,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1960827029, now seen corresponding path program 14 times [2022-01-31 03:22:28,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:28,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750564527] [2022-01-31 03:22:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:28,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:28,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:28,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:28,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 03:22:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:29,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750564527] [2022-01-31 03:22:29,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750564527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5119609] [2022-01-31 03:22:29,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:22:29,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:29,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:29,068 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:29,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-31 03:22:29,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:22:29,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:29,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 03:22:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:29,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:30,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5119609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:30,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:30,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-01-31 03:22:30,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644104909] [2022-01-31 03:22:30,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:30,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 03:22:30,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 03:22:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 03:22:30,357 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:30,930 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-01-31 03:22:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 03:22:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-01-31 03:22:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:30,931 INFO L225 Difference]: With dead ends: 85 [2022-01-31 03:22:30,931 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 03:22:30,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3527 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 03:22:30,932 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:30,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 70 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 03:22:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-31 03:22:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-01-31 03:22:30,941 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 63 [2022-01-31 03:22:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:30,941 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-01-31 03:22:30,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-01-31 03:22:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 03:22:30,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:30,944 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:30,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:31,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-31 03:22:31,159 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:31,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1410871959, now seen corresponding path program 15 times [2022-01-31 03:22:31,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:31,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550445014] [2022-01-31 03:22:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:31,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:31,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:31,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:31,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 03:22:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:31,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:31,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550445014] [2022-01-31 03:22:31,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550445014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:31,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239986324] [2022-01-31 03:22:31,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:22:31,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:31,546 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:31,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-31 03:22:31,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-31 03:22:31,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:31,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 03:22:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:32,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:33,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239986324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:33,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:33,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-01-31 03:22:33,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245895625] [2022-01-31 03:22:33,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:33,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 03:22:33,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:33,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 03:22:33,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 03:22:33,029 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:33,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:33,850 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-01-31 03:22:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 03:22:33,850 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-01-31 03:22:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:33,851 INFO L225 Difference]: With dead ends: 98 [2022-01-31 03:22:33,851 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 03:22:33,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 03:22:33,853 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 193 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:33,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 77 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:22:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 03:22:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2022-01-31 03:22:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-01-31 03:22:33,868 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 65 [2022-01-31 03:22:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:33,870 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-01-31 03:22:33,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-01-31 03:22:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 03:22:33,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:33,870 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:33,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-31 03:22:34,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-31 03:22:34,083 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash 336446803, now seen corresponding path program 15 times [2022-01-31 03:22:34,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:34,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614598834] [2022-01-31 03:22:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:34,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:34,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:34,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:34,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 03:22:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:34,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:34,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614598834] [2022-01-31 03:22:34,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614598834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:34,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631270341] [2022-01-31 03:22:34,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:22:34,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:34,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:34,492 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:34,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-31 03:22:34,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-31 03:22:34,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:34,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 03:22:34,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:35,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:36,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631270341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:36,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:36,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-01-31 03:22:36,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289384184] [2022-01-31 03:22:36,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:36,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 03:22:36,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:36,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 03:22:36,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 03:22:36,055 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:36,815 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-01-31 03:22:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 03:22:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-01-31 03:22:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:36,816 INFO L225 Difference]: With dead ends: 93 [2022-01-31 03:22:36,816 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 03:22:36,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 03:22:36,817 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:36,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 03:22:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-01-31 03:22:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.088235294117647) internal successors, (74), 70 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:36,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-01-31 03:22:36,825 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 65 [2022-01-31 03:22:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:36,825 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-01-31 03:22:36,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-01-31 03:22:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 03:22:36,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:36,826 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:36,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-31 03:22:37,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:37,035 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash -524390571, now seen corresponding path program 16 times [2022-01-31 03:22:37,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:37,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324505418] [2022-01-31 03:22:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:37,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:37,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:37,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 03:22:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:37,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:37,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324505418] [2022-01-31 03:22:37,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324505418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627985906] [2022-01-31 03:22:37,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:22:37,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:37,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:37,386 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:37,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-31 03:22:37,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:22:37,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:37,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 03:22:37,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:37,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:38,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627985906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:38,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:38,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-01-31 03:22:38,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548364946] [2022-01-31 03:22:38,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:38,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 03:22:38,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:38,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 03:22:38,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 03:22:38,837 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:39,612 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2022-01-31 03:22:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 03:22:39,612 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-01-31 03:22:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:39,613 INFO L225 Difference]: With dead ends: 95 [2022-01-31 03:22:39,613 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 03:22:39,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 03:22:39,615 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:39,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 117 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:22:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 03:22:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-01-31 03:22:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-01-31 03:22:39,621 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 67 [2022-01-31 03:22:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:39,622 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-01-31 03:22:39,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-01-31 03:22:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 03:22:39,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:39,622 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:39,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-31 03:22:39,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-31 03:22:39,835 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:39,836 INFO L85 PathProgramCache]: Analyzing trace with hash 95472949, now seen corresponding path program 16 times [2022-01-31 03:22:39,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:39,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791705432] [2022-01-31 03:22:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:39,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:39,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:40,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 03:22:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:40,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:40,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791705432] [2022-01-31 03:22:40,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791705432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:40,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304277400] [2022-01-31 03:22:40,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:22:40,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:40,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:40,205 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:40,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-31 03:22:40,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:22:40,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:40,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 03:22:40,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:40,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:41,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304277400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:41,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:41,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-01-31 03:22:41,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456017800] [2022-01-31 03:22:41,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:41,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 03:22:41,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 03:22:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 03:22:41,530 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:42,245 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-01-31 03:22:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 03:22:42,246 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-01-31 03:22:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:42,246 INFO L225 Difference]: With dead ends: 89 [2022-01-31 03:22:42,246 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 03:22:42,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 03:22:42,247 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:42,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 95 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:22:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 03:22:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-01-31 03:22:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 68 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-01-31 03:22:42,259 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2022-01-31 03:22:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:42,259 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-01-31 03:22:42,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-01-31 03:22:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 03:22:42,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:42,260 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:42,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:42,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-31 03:22:42,484 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:42,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:42,484 INFO L85 PathProgramCache]: Analyzing trace with hash -193036489, now seen corresponding path program 17 times [2022-01-31 03:22:42,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:42,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685858240] [2022-01-31 03:22:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:42,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:42,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:42,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:42,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 03:22:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:42,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:42,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685858240] [2022-01-31 03:22:42,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685858240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:42,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435628746] [2022-01-31 03:22:42,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:22:42,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:42,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:42,845 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:42,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-31 03:22:42,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-31 03:22:42,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:42,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 03:22:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:43,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:44,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435628746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:44,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:44,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-01-31 03:22:44,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870925433] [2022-01-31 03:22:44,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:44,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 03:22:44,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:44,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 03:22:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 03:22:44,466 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:45,331 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-01-31 03:22:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 03:22:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-01-31 03:22:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:45,332 INFO L225 Difference]: With dead ends: 102 [2022-01-31 03:22:45,332 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 03:22:45,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5214 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 03:22:45,334 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:45,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 77 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 03:22:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-01-31 03:22:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 71 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-01-31 03:22:45,344 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 69 [2022-01-31 03:22:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:45,344 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-01-31 03:22:45,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-01-31 03:22:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 03:22:45,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:45,345 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:45,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:45,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-31 03:22:45,559 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1902454157, now seen corresponding path program 17 times [2022-01-31 03:22:45,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:45,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109981454] [2022-01-31 03:22:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:45,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:45,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:45,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:45,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 03:22:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:45,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:45,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109981454] [2022-01-31 03:22:45,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109981454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:45,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476566972] [2022-01-31 03:22:45,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:22:45,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:45,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:45,954 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:45,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-31 03:22:46,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-31 03:22:46,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 03:22:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:46,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476566972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:47,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:47,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-01-31 03:22:47,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862627145] [2022-01-31 03:22:47,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:47,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 03:22:47,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 03:22:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 03:22:47,575 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:48,430 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-01-31 03:22:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 03:22:48,431 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-01-31 03:22:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:48,432 INFO L225 Difference]: With dead ends: 97 [2022-01-31 03:22:48,432 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 03:22:48,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 03:22:48,433 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:48,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 85 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:22:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 03:22:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-01-31 03:22:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 74 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-01-31 03:22:48,442 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 69 [2022-01-31 03:22:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:48,442 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-01-31 03:22:48,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-01-31 03:22:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 03:22:48,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:48,443 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:48,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-31 03:22:48,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:48,655 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:48,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:48,656 INFO L85 PathProgramCache]: Analyzing trace with hash -329597835, now seen corresponding path program 18 times [2022-01-31 03:22:48,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:48,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683481000] [2022-01-31 03:22:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:48,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:48,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:48,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:48,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 03:22:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:49,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:49,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683481000] [2022-01-31 03:22:49,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683481000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:49,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25106457] [2022-01-31 03:22:49,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:22:49,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:49,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:49,005 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:49,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-31 03:22:49,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-31 03:22:49,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 03:22:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:49,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:50,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25106457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:50,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:50,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-01-31 03:22:50,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968211032] [2022-01-31 03:22:50,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:50,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 03:22:50,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:50,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 03:22:50,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 03:22:50,563 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:51,331 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-01-31 03:22:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 03:22:51,331 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-01-31 03:22:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:51,332 INFO L225 Difference]: With dead ends: 99 [2022-01-31 03:22:51,332 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 03:22:51,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5103 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 03:22:51,334 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 147 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:51,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 82 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 03:22:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2022-01-31 03:22:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 73 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-01-31 03:22:51,340 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 71 [2022-01-31 03:22:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:51,340 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-01-31 03:22:51,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-01-31 03:22:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 03:22:51,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:51,341 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:51,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-31 03:22:51,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:51,541 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:51,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1662215467, now seen corresponding path program 18 times [2022-01-31 03:22:51,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:51,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51365081] [2022-01-31 03:22:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:51,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:51,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:51,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:51,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 03:22:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:51,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51365081] [2022-01-31 03:22:51,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51365081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394202344] [2022-01-31 03:22:51,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:22:51,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:51,970 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:51,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-31 03:22:52,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-31 03:22:52,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:22:52,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 03:22:52,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:52,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:53,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394202344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:53,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:53,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-01-31 03:22:53,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118440590] [2022-01-31 03:22:53,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:53,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 03:22:53,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 03:22:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 03:22:53,487 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:54,219 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-01-31 03:22:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 03:22:54,219 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-01-31 03:22:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:54,220 INFO L225 Difference]: With dead ends: 93 [2022-01-31 03:22:54,220 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 03:22:54,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5038 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 03:22:54,222 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 120 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:54,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 90 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:22:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 03:22:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-01-31 03:22:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 72 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-01-31 03:22:54,229 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 71 [2022-01-31 03:22:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:54,229 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-01-31 03:22:54,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-01-31 03:22:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 03:22:54,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:54,230 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:54,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:54,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-31 03:22:54,431 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1409456937, now seen corresponding path program 19 times [2022-01-31 03:22:54,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:54,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527046717] [2022-01-31 03:22:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:54,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:54,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:54,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 03:22:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:54,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527046717] [2022-01-31 03:22:54,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527046717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878214369] [2022-01-31 03:22:54,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:22:54,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:54,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:54,860 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:54,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-31 03:22:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 03:22:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:55,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:22:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:56,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878214369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:22:56,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:22:56,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-01-31 03:22:56,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494895695] [2022-01-31 03:22:56,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:22:56,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 03:22:56,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:22:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 03:22:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 03:22:56,649 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:22:57,791 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-01-31 03:22:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 03:22:57,791 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-01-31 03:22:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:22:57,792 INFO L225 Difference]: With dead ends: 106 [2022-01-31 03:22:57,792 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 03:22:57,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6086 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 03:22:57,793 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:22:57,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 132 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:22:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 03:22:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-01-31 03:22:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:22:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-01-31 03:22:57,800 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 73 [2022-01-31 03:22:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:22:57,800 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-01-31 03:22:57,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:22:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-01-31 03:22:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 03:22:57,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:22:57,800 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:22:57,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-31 03:22:58,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-01-31 03:22:58,001 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:22:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:22:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash 833644691, now seen corresponding path program 19 times [2022-01-31 03:22:58,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:22:58,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711149909] [2022-01-31 03:22:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:22:58,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:22:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:58,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:22:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:58,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:22:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:58,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 03:22:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:58,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:22:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711149909] [2022-01-31 03:22:58,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711149909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:22:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373752093] [2022-01-31 03:22:58,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:22:58,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:22:58,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:22:58,423 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:22:58,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-31 03:22:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:22:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 03:22:58,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:22:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:22:59,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:00,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373752093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:00,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:00,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-01-31 03:23:00,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403589599] [2022-01-31 03:23:00,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:00,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 03:23:00,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:00,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 03:23:00,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 03:23:00,137 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:01,063 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-01-31 03:23:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 03:23:01,063 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-01-31 03:23:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:01,064 INFO L225 Difference]: With dead ends: 101 [2022-01-31 03:23:01,064 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 03:23:01,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6098 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 03:23:01,065 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:01,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 95 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 03:23:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-01-31 03:23:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 78 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-01-31 03:23:01,075 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 73 [2022-01-31 03:23:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:01,076 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-01-31 03:23:01,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-01-31 03:23:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 03:23:01,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:01,076 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:01,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-31 03:23:01,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-31 03:23:01,291 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash 541409941, now seen corresponding path program 20 times [2022-01-31 03:23:01,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:01,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326259518] [2022-01-31 03:23:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:01,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:01,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:01,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:01,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 03:23:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:01,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:01,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326259518] [2022-01-31 03:23:01,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326259518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:01,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849423256] [2022-01-31 03:23:01,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:23:01,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:01,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:01,672 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:01,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-31 03:23:01,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:23:01,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:01,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 03:23:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:02,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:03,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849423256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:03,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:03,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-01-31 03:23:03,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979196658] [2022-01-31 03:23:03,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:03,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 03:23:03,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 03:23:03,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 03:23:03,380 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:04,284 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2022-01-31 03:23:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 03:23:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-01-31 03:23:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:04,286 INFO L225 Difference]: With dead ends: 103 [2022-01-31 03:23:04,286 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 03:23:04,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5965 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 03:23:04,288 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:04,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 117 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 03:23:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-01-31 03:23:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 77 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-01-31 03:23:04,297 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2022-01-31 03:23:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:04,298 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-01-31 03:23:04,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-01-31 03:23:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 03:23:04,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:04,298 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:04,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-31 03:23:04,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-31 03:23:04,507 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash -224886411, now seen corresponding path program 20 times [2022-01-31 03:23:04,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:04,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478869596] [2022-01-31 03:23:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:04,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:04,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:04,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:04,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 03:23:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:04,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:04,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478869596] [2022-01-31 03:23:04,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478869596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:04,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878625145] [2022-01-31 03:23:04,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:23:04,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:04,927 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:04,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-31 03:23:05,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:23:05,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:05,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 03:23:05,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:05,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:06,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878625145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:06,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:06,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-01-31 03:23:06,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133995405] [2022-01-31 03:23:06,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:06,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 03:23:06,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 03:23:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 03:23:06,769 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:07,615 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-01-31 03:23:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 03:23:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-01-31 03:23:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:07,616 INFO L225 Difference]: With dead ends: 97 [2022-01-31 03:23:07,617 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 03:23:07,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5894 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 03:23:07,618 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 141 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:07,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 95 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 03:23:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-01-31 03:23:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-01-31 03:23:07,625 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 75 [2022-01-31 03:23:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:07,626 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-01-31 03:23:07,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-01-31 03:23:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 03:23:07,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:07,627 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:07,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-31 03:23:07,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:07,846 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:07,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:07,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1179263863, now seen corresponding path program 21 times [2022-01-31 03:23:07,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:07,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055763495] [2022-01-31 03:23:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:07,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:07,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:07,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:08,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 03:23:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:08,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:08,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055763495] [2022-01-31 03:23:08,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055763495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:08,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367289486] [2022-01-31 03:23:08,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:23:08,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:08,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:08,316 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:08,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-31 03:23:08,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-31 03:23:08,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 03:23:08,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:09,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:10,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367289486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:10,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:10,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-01-31 03:23:10,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472668059] [2022-01-31 03:23:10,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:10,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 03:23:10,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:10,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 03:23:10,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 03:23:10,297 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:11,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:11,380 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-01-31 03:23:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 03:23:11,380 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-01-31 03:23:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:11,381 INFO L225 Difference]: With dead ends: 110 [2022-01-31 03:23:11,381 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 03:23:11,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7025 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 03:23:11,382 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:11,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 87 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 03:23:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-01-31 03:23:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-01-31 03:23:11,391 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 77 [2022-01-31 03:23:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:11,391 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-01-31 03:23:11,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-01-31 03:23:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 03:23:11,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:11,392 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:11,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-31 03:23:11,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-31 03:23:11,592 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash 747351987, now seen corresponding path program 21 times [2022-01-31 03:23:11,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:11,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137574549] [2022-01-31 03:23:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:11,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:11,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:11,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:11,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 03:23:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:12,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137574549] [2022-01-31 03:23:12,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137574549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:12,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940511907] [2022-01-31 03:23:12,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:23:12,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:12,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:12,127 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:12,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-31 03:23:12,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-31 03:23:12,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:12,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 03:23:12,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:12,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:13,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940511907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:13,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:13,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-01-31 03:23:13,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945901039] [2022-01-31 03:23:13,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:13,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 03:23:13,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:13,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 03:23:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 03:23:13,979 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:14,997 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-01-31 03:23:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 03:23:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-01-31 03:23:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:14,998 INFO L225 Difference]: With dead ends: 105 [2022-01-31 03:23:14,998 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 03:23:15,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7038 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 03:23:15,000 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:15,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 95 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 03:23:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-01-31 03:23:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.075) internal successors, (86), 82 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-01-31 03:23:15,012 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 77 [2022-01-31 03:23:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:15,012 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-01-31 03:23:15,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-01-31 03:23:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 03:23:15,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:15,013 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:15,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-31 03:23:15,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-31 03:23:15,223 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:15,224 INFO L85 PathProgramCache]: Analyzing trace with hash -781499979, now seen corresponding path program 22 times [2022-01-31 03:23:15,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:15,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967369245] [2022-01-31 03:23:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:15,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:15,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:15,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:15,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 03:23:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:15,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:15,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967369245] [2022-01-31 03:23:15,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967369245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:15,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493885769] [2022-01-31 03:23:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:23:15,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:15,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:15,685 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:15,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-31 03:23:15,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:23:15,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:15,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 03:23:15,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:16,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:17,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493885769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:17,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:17,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-01-31 03:23:17,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777681974] [2022-01-31 03:23:17,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:17,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 03:23:17,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 03:23:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 03:23:17,570 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:18,468 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-01-31 03:23:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 03:23:18,469 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-01-31 03:23:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:18,469 INFO L225 Difference]: With dead ends: 107 [2022-01-31 03:23:18,470 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 03:23:18,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6894 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 03:23:18,472 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:18,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 92 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 03:23:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-01-31 03:23:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 81 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-01-31 03:23:18,480 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 79 [2022-01-31 03:23:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:18,480 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-01-31 03:23:18,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-01-31 03:23:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 03:23:18,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:18,481 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:18,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-31 03:23:18,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-31 03:23:18,686 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1521074453, now seen corresponding path program 22 times [2022-01-31 03:23:18,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:18,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822701849] [2022-01-31 03:23:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:18,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:18,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:18,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:18,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 03:23:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:19,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:19,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822701849] [2022-01-31 03:23:19,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822701849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:19,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372668719] [2022-01-31 03:23:19,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:23:19,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:19,171 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:19,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-31 03:23:19,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:23:19,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:19,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 03:23:19,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:19,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:20,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372668719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:20,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:20,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-01-31 03:23:20,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594912483] [2022-01-31 03:23:20,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:20,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 03:23:20,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 03:23:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 03:23:20,981 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:21,889 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-01-31 03:23:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 03:23:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-01-31 03:23:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:21,890 INFO L225 Difference]: With dead ends: 101 [2022-01-31 03:23:21,890 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 03:23:21,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6817 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 03:23:21,893 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 193 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:21,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 95 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:21,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 03:23:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-01-31 03:23:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 80 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-01-31 03:23:21,903 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 79 [2022-01-31 03:23:21,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:21,903 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-01-31 03:23:21,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-01-31 03:23:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 03:23:21,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:21,904 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:21,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-31 03:23:22,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:22,116 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash -284558569, now seen corresponding path program 23 times [2022-01-31 03:23:22,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:22,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892896536] [2022-01-31 03:23:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:22,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:22,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:22,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 03:23:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:22,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:22,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892896536] [2022-01-31 03:23:22,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892896536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:22,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995471030] [2022-01-31 03:23:22,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:23:22,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:22,601 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:22,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-31 03:23:22,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-31 03:23:22,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 03:23:22,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:23,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:24,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995471030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:24,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:24,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-01-31 03:23:24,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906392543] [2022-01-31 03:23:24,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:24,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 03:23:24,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:24,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 03:23:24,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 03:23:24,701 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:25,828 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-01-31 03:23:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 03:23:25,829 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-01-31 03:23:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:25,829 INFO L225 Difference]: With dead ends: 114 [2022-01-31 03:23:25,830 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 03:23:25,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8031 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 03:23:25,832 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:25,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 102 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 03:23:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2022-01-31 03:23:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-01-31 03:23:25,840 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 81 [2022-01-31 03:23:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:25,840 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-01-31 03:23:25,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-01-31 03:23:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 03:23:25,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:25,841 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:25,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-31 03:23:26,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:26,042 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:26,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1280962515, now seen corresponding path program 23 times [2022-01-31 03:23:26,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:26,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399144937] [2022-01-31 03:23:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:26,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:26,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:26,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:26,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 03:23:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:26,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399144937] [2022-01-31 03:23:26,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399144937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629349527] [2022-01-31 03:23:26,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:23:26,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:26,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:26,542 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:26,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-31 03:23:26,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-31 03:23:26,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:26,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 03:23:26,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:27,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:28,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629349527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:28,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:28,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-01-31 03:23:28,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110549508] [2022-01-31 03:23:28,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:28,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 03:23:28,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 03:23:28,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 03:23:28,631 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:29,661 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2022-01-31 03:23:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 03:23:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-01-31 03:23:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:29,662 INFO L225 Difference]: With dead ends: 109 [2022-01-31 03:23:29,662 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 03:23:29,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8045 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 03:23:29,664 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:29,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 65 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:23:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 03:23:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-01-31 03:23:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2022-01-31 03:23:29,675 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 81 [2022-01-31 03:23:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:29,675 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2022-01-31 03:23:29,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:29,676 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2022-01-31 03:23:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 03:23:29,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:29,676 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:29,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-31 03:23:29,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:29,895 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash 917109205, now seen corresponding path program 24 times [2022-01-31 03:23:29,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:29,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642410773] [2022-01-31 03:23:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:29,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:29,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:30,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 03:23:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:30,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:30,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642410773] [2022-01-31 03:23:30,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642410773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:30,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28680200] [2022-01-31 03:23:30,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:23:30,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:30,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:30,320 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:30,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-31 03:23:30,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-01-31 03:23:30,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:30,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 03:23:30,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:31,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:32,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28680200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:32,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:32,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-01-31 03:23:32,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866891151] [2022-01-31 03:23:32,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:32,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 03:23:32,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:32,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 03:23:32,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 03:23:32,366 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:33,349 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2022-01-31 03:23:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 03:23:33,350 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-01-31 03:23:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:33,350 INFO L225 Difference]: With dead ends: 111 [2022-01-31 03:23:33,350 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 03:23:33,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7890 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 03:23:33,352 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:33,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 72 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 03:23:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-01-31 03:23:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 85 states have internal predecessors, (88), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-01-31 03:23:33,363 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 83 [2022-01-31 03:23:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:33,364 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-01-31 03:23:33,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-01-31 03:23:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 03:23:33,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:33,364 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:33,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-31 03:23:33,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-31 03:23:33,567 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1761974709, now seen corresponding path program 24 times [2022-01-31 03:23:33,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:33,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154988199] [2022-01-31 03:23:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:33,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:33,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:33,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:33,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 03:23:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:34,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:34,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154988199] [2022-01-31 03:23:34,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154988199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:34,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044102585] [2022-01-31 03:23:34,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:23:34,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:34,081 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:34,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-31 03:23:34,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-01-31 03:23:34,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:34,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 03:23:34,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:34,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:36,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044102585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:36,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:36,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-01-31 03:23:36,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531686642] [2022-01-31 03:23:36,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:36,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 03:23:36,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 03:23:36,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 03:23:36,055 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:37,096 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-01-31 03:23:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 03:23:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-01-31 03:23:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:37,097 INFO L225 Difference]: With dead ends: 105 [2022-01-31 03:23:37,097 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 03:23:37,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7807 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 03:23:37,099 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:37,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 100 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 03:23:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-01-31 03:23:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.048780487804878) internal successors, (86), 84 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-01-31 03:23:37,106 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 83 [2022-01-31 03:23:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:37,107 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-01-31 03:23:37,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-01-31 03:23:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 03:23:37,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:37,107 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:37,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-31 03:23:37,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-31 03:23:37,309 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:37,309 INFO L85 PathProgramCache]: Analyzing trace with hash -707646537, now seen corresponding path program 25 times [2022-01-31 03:23:37,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:37,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512293538] [2022-01-31 03:23:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:37,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:37,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:37,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 03:23:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:37,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512293538] [2022-01-31 03:23:37,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512293538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099050101] [2022-01-31 03:23:37,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:23:37,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:37,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:37,847 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:37,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-31 03:23:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 03:23:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:38,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:40,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099050101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:40,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:40,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-01-31 03:23:40,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337353120] [2022-01-31 03:23:40,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:40,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 03:23:40,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:40,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 03:23:40,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 03:23:40,104 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:41,346 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-01-31 03:23:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 03:23:41,346 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-01-31 03:23:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:41,347 INFO L225 Difference]: With dead ends: 118 [2022-01-31 03:23:41,347 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 03:23:41,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 03:23:41,349 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:41,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 92 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:23:41,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 03:23:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2022-01-31 03:23:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 87 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-01-31 03:23:41,362 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 85 [2022-01-31 03:23:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:41,362 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-01-31 03:23:41,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-01-31 03:23:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 03:23:41,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:41,363 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:41,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-31 03:23:41,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-31 03:23:41,575 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:41,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:41,576 INFO L85 PathProgramCache]: Analyzing trace with hash 540567795, now seen corresponding path program 25 times [2022-01-31 03:23:41,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:41,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985686033] [2022-01-31 03:23:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:41,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:41,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:41,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 03:23:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:42,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:42,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985686033] [2022-01-31 03:23:42,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985686033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:42,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681787976] [2022-01-31 03:23:42,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:23:42,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:42,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:42,201 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:42,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-31 03:23:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:42,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 03:23:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:43,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:44,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681787976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:44,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:44,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-01-31 03:23:44,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103456724] [2022-01-31 03:23:44,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:44,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 03:23:44,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 03:23:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 03:23:44,402 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:45,573 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-01-31 03:23:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 03:23:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-01-31 03:23:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:45,574 INFO L225 Difference]: With dead ends: 113 [2022-01-31 03:23:45,574 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 03:23:45,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9119 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 03:23:45,576 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 191 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:45,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 85 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:23:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 03:23:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-01-31 03:23:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 90 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:45,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2022-01-31 03:23:45,585 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 85 [2022-01-31 03:23:45,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:45,585 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2022-01-31 03:23:45,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:45,585 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2022-01-31 03:23:45,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 03:23:45,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:45,586 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:45,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-31 03:23:45,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-31 03:23:45,786 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1932612875, now seen corresponding path program 26 times [2022-01-31 03:23:45,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:45,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336076131] [2022-01-31 03:23:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:45,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:45,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:45,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 03:23:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:46,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:46,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336076131] [2022-01-31 03:23:46,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336076131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:46,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998272387] [2022-01-31 03:23:46,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:23:46,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:46,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:46,287 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:46,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-31 03:23:46,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:23:46,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:46,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 03:23:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:47,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:48,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998272387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:48,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:48,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-01-31 03:23:48,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182217637] [2022-01-31 03:23:48,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:48,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 03:23:48,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:48,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 03:23:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 03:23:48,557 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:49,666 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-01-31 03:23:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 03:23:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-01-31 03:23:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:49,667 INFO L225 Difference]: With dead ends: 115 [2022-01-31 03:23:49,667 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 03:23:49,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8953 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 03:23:49,669 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 146 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:49,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 102 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:23:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 03:23:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-01-31 03:23:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2022-01-31 03:23:49,678 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 87 [2022-01-31 03:23:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:49,678 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2022-01-31 03:23:49,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2022-01-31 03:23:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 03:23:49,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:49,679 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:49,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-31 03:23:49,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-01-31 03:23:49,880 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1786688683, now seen corresponding path program 26 times [2022-01-31 03:23:49,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:49,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740118189] [2022-01-31 03:23:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:49,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:49,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:49,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:50,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 03:23:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:50,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:50,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740118189] [2022-01-31 03:23:50,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740118189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:50,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337700343] [2022-01-31 03:23:50,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:23:50,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:50,459 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:50,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-31 03:23:50,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:23:50,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 03:23:50,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:51,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337700343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:52,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:52,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-01-31 03:23:52,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934958385] [2022-01-31 03:23:52,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:52,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 03:23:52,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 03:23:52,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 03:23:52,583 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:53,735 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2022-01-31 03:23:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 03:23:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-01-31 03:23:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:53,740 INFO L225 Difference]: With dead ends: 109 [2022-01-31 03:23:53,740 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 03:23:53,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8864 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 03:23:53,743 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:53,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 130 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:23:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 03:23:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-01-31 03:23:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 88 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-01-31 03:23:53,756 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 87 [2022-01-31 03:23:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:53,756 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-01-31 03:23:53,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-01-31 03:23:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 03:23:53,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:53,757 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:53,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-31 03:23:53,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-31 03:23:53,972 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash -769133225, now seen corresponding path program 27 times [2022-01-31 03:23:53,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:53,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602327870] [2022-01-31 03:23:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:53,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:54,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:54,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:54,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 03:23:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:54,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:54,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602327870] [2022-01-31 03:23:54,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602327870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:54,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106023018] [2022-01-31 03:23:54,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:23:54,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:54,487 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:54,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-31 03:23:54,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-01-31 03:23:54,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:54,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 03:23:54,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:23:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:55,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:23:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:56,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106023018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:23:56,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:23:56,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-01-31 03:23:56,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303589534] [2022-01-31 03:23:56,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:23:56,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 03:23:56,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:23:56,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 03:23:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 03:23:56,976 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:23:58,356 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-01-31 03:23:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 03:23:58,356 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-01-31 03:23:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:23:58,357 INFO L225 Difference]: With dead ends: 122 [2022-01-31 03:23:58,357 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 03:23:58,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10244 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 03:23:58,358 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 182 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:23:58,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 122 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:23:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 03:23:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2022-01-31 03:23:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 91 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:23:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-01-31 03:23:58,367 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2022-01-31 03:23:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:23:58,368 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-01-31 03:23:58,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:23:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-01-31 03:23:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 03:23:58,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:23:58,369 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:23:58,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-31 03:23:58,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:58,593 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:23:58,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:23:58,593 INFO L85 PathProgramCache]: Analyzing trace with hash 489970451, now seen corresponding path program 27 times [2022-01-31 03:23:58,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:23:58,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386630019] [2022-01-31 03:23:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:23:58,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:23:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:58,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:23:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:58,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:23:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:58,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 03:23:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:23:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:23:59,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:23:59,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386630019] [2022-01-31 03:23:59,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386630019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:23:59,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634965792] [2022-01-31 03:23:59,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:23:59,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:23:59,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:23:59,191 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:23:59,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-31 03:23:59,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-01-31 03:23:59,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:23:59,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 03:23:59,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:00,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:01,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634965792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:01,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:01,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-01-31 03:24:01,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331167293] [2022-01-31 03:24:01,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:01,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 03:24:01,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:01,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 03:24:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 03:24:01,582 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:02,907 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-01-31 03:24:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 03:24:02,907 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-01-31 03:24:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:02,908 INFO L225 Difference]: With dead ends: 117 [2022-01-31 03:24:02,908 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 03:24:02,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10260 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 03:24:02,910 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 215 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:02,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 90 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:24:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 03:24:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-01-31 03:24:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.065217391304348) internal successors, (98), 94 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2022-01-31 03:24:02,920 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 89 [2022-01-31 03:24:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:02,920 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2022-01-31 03:24:02,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2022-01-31 03:24:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 03:24:02,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:02,921 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:02,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-31 03:24:03,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:03,128 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash 982947093, now seen corresponding path program 28 times [2022-01-31 03:24:03,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541968962] [2022-01-31 03:24:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:03,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:03,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:03,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:03,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 03:24:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:03,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:03,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541968962] [2022-01-31 03:24:03,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541968962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:03,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431053048] [2022-01-31 03:24:03,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:24:03,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:03,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:03,688 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:03,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-31 03:24:03,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:24:03,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:03,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 03:24:03,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:04,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:06,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431053048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:06,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:06,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-01-31 03:24:06,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046483914] [2022-01-31 03:24:06,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:06,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 03:24:06,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 03:24:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 03:24:06,153 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:07,240 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2022-01-31 03:24:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 03:24:07,241 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-01-31 03:24:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:07,241 INFO L225 Difference]: With dead ends: 119 [2022-01-31 03:24:07,241 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 03:24:07,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 03:24:07,244 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:07,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 77 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:24:07,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 03:24:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-01-31 03:24:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.054945054945055) internal successors, (96), 93 states have internal predecessors, (96), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-01-31 03:24:07,254 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2022-01-31 03:24:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:07,255 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-01-31 03:24:07,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:07,255 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-01-31 03:24:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 03:24:07,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:07,255 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:07,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-31 03:24:07,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:07,457 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:07,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:07,457 INFO L85 PathProgramCache]: Analyzing trace with hash -538831371, now seen corresponding path program 28 times [2022-01-31 03:24:07,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:07,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970352237] [2022-01-31 03:24:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:07,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:07,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:07,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:07,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 03:24:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:08,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:08,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970352237] [2022-01-31 03:24:08,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970352237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:08,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577153740] [2022-01-31 03:24:08,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:24:08,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:08,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:08,051 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:08,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-31 03:24:08,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:24:08,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:08,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 03:24:08,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:09,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:10,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577153740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:10,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:10,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-01-31 03:24:10,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784829270] [2022-01-31 03:24:10,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:10,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 03:24:10,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:10,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 03:24:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 03:24:10,392 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:11,567 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-01-31 03:24:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 03:24:11,567 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-01-31 03:24:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:11,568 INFO L225 Difference]: With dead ends: 113 [2022-01-31 03:24:11,568 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 03:24:11,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9988 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 03:24:11,569 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 178 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:11,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 105 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:24:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 03:24:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-01-31 03:24:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 92 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-01-31 03:24:11,579 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 91 [2022-01-31 03:24:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:11,579 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-01-31 03:24:11,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-01-31 03:24:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 03:24:11,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:11,580 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:11,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-31 03:24:11,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-01-31 03:24:11,796 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash 125868023, now seen corresponding path program 29 times [2022-01-31 03:24:11,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:11,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576047445] [2022-01-31 03:24:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:11,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:11,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:11,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:12,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 03:24:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:12,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:12,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576047445] [2022-01-31 03:24:12,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576047445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:12,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180771828] [2022-01-31 03:24:12,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:24:12,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:12,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:12,357 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:12,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-31 03:24:12,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-31 03:24:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 03:24:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:13,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:15,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180771828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:15,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:15,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-01-31 03:24:15,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41232085] [2022-01-31 03:24:15,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:15,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 03:24:15,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:15,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 03:24:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 03:24:15,017 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:16,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:16,442 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-01-31 03:24:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 03:24:16,442 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-01-31 03:24:16,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:16,443 INFO L225 Difference]: With dead ends: 126 [2022-01-31 03:24:16,443 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 03:24:16,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11451 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 03:24:16,445 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:16,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 102 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:24:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 03:24:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-01-31 03:24:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-01-31 03:24:16,460 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 93 [2022-01-31 03:24:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:16,460 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-01-31 03:24:16,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-01-31 03:24:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 03:24:16,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:16,461 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:16,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-31 03:24:16,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-01-31 03:24:16,661 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:16,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1035270605, now seen corresponding path program 29 times [2022-01-31 03:24:16,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:16,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901269455] [2022-01-31 03:24:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:16,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:16,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:16,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:16,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 03:24:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:17,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:17,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901269455] [2022-01-31 03:24:17,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901269455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:17,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115077366] [2022-01-31 03:24:17,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:24:17,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:17,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:17,309 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:17,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-31 03:24:17,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-31 03:24:17,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:17,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 03:24:17,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:18,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:19,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115077366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:19,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:19,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-01-31 03:24:19,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322173000] [2022-01-31 03:24:19,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:20,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 03:24:20,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:20,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 03:24:20,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 03:24:20,002 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:21,483 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2022-01-31 03:24:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 03:24:21,483 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-01-31 03:24:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:21,484 INFO L225 Difference]: With dead ends: 121 [2022-01-31 03:24:21,484 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 03:24:21,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11468 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 03:24:21,485 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:21,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 110 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:24:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 03:24:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2022-01-31 03:24:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.0625) internal successors, (102), 98 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2022-01-31 03:24:21,500 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 93 [2022-01-31 03:24:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:21,500 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2022-01-31 03:24:21,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2022-01-31 03:24:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 03:24:21,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:21,501 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:21,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-31 03:24:21,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:21,725 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash -189859787, now seen corresponding path program 30 times [2022-01-31 03:24:21,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:21,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947457833] [2022-01-31 03:24:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:21,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:21,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:21,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:21,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 03:24:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:22,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:22,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947457833] [2022-01-31 03:24:22,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947457833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:22,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584878692] [2022-01-31 03:24:22,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:24:22,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:22,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:22,251 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:22,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-31 03:24:22,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-01-31 03:24:22,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:22,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 03:24:22,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:23,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:24,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584878692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:24,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:24,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-01-31 03:24:24,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277491235] [2022-01-31 03:24:24,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:24,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 03:24:24,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 03:24:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 03:24:24,851 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:26,359 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-01-31 03:24:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 03:24:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-01-31 03:24:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:26,360 INFO L225 Difference]: With dead ends: 123 [2022-01-31 03:24:26,360 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 03:24:26,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11280 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 03:24:26,362 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 197 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:26,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 92 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:24:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 03:24:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2022-01-31 03:24:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-01-31 03:24:26,373 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 95 [2022-01-31 03:24:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:26,373 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-01-31 03:24:26,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-01-31 03:24:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 03:24:26,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:26,374 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:26,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-31 03:24:26,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:26,579 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1943878037, now seen corresponding path program 30 times [2022-01-31 03:24:26,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:26,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509658413] [2022-01-31 03:24:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:26,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:26,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:26,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:26,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 03:24:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:27,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509658413] [2022-01-31 03:24:27,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509658413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149582922] [2022-01-31 03:24:27,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:24:27,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:27,235 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:27,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-31 03:24:27,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-01-31 03:24:27,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:27,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 03:24:27,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:28,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149582922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:29,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:29,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-01-31 03:24:29,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244134080] [2022-01-31 03:24:29,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:29,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 03:24:29,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 03:24:29,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 03:24:29,726 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:30,971 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-01-31 03:24:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 03:24:30,971 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-01-31 03:24:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:30,972 INFO L225 Difference]: With dead ends: 117 [2022-01-31 03:24:30,972 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 03:24:30,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11179 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 03:24:30,974 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 152 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:30,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 95 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:24:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 03:24:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-01-31 03:24:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 96 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-01-31 03:24:30,993 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 95 [2022-01-31 03:24:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:30,994 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-01-31 03:24:30,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-01-31 03:24:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 03:24:30,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:30,994 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:31,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-31 03:24:31,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-31 03:24:31,219 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:31,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1992207465, now seen corresponding path program 31 times [2022-01-31 03:24:31,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:31,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215534013] [2022-01-31 03:24:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:31,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:31,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:31,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:31,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 03:24:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:31,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:31,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215534013] [2022-01-31 03:24:31,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215534013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:31,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404046328] [2022-01-31 03:24:31,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:24:31,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:31,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:31,795 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:31,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-31 03:24:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:31,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 03:24:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:32,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:34,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404046328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:34,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:34,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-01-31 03:24:34,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591346491] [2022-01-31 03:24:34,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:34,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 03:24:34,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 03:24:34,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 03:24:34,640 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:36,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:36,266 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-01-31 03:24:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 03:24:36,267 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-01-31 03:24:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:36,267 INFO L225 Difference]: With dead ends: 130 [2022-01-31 03:24:36,268 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 03:24:36,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12725 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 03:24:36,270 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:36,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:24:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 03:24:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-01-31 03:24:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 99 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2022-01-31 03:24:36,280 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 97 [2022-01-31 03:24:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:36,281 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2022-01-31 03:24:36,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2022-01-31 03:24:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 03:24:36,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:36,281 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:36,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-31 03:24:36,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-31 03:24:36,482 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:36,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1133925805, now seen corresponding path program 31 times [2022-01-31 03:24:36,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:36,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638752765] [2022-01-31 03:24:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:36,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:36,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:36,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:36,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 03:24:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:37,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638752765] [2022-01-31 03:24:37,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638752765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109615015] [2022-01-31 03:24:37,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:24:37,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:37,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:37,208 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:37,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-31 03:24:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 03:24:37,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:38,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:40,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109615015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:40,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:40,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-01-31 03:24:40,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636823304] [2022-01-31 03:24:40,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:40,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 03:24:40,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:40,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 03:24:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 03:24:40,005 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:41,471 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2022-01-31 03:24:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 03:24:41,472 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-01-31 03:24:41,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:41,472 INFO L225 Difference]: With dead ends: 125 [2022-01-31 03:24:41,472 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 03:24:41,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12743 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 03:24:41,474 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:41,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 90 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:24:41,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 03:24:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-01-31 03:24:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.06) internal successors, (106), 102 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2022-01-31 03:24:41,491 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 97 [2022-01-31 03:24:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:41,491 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2022-01-31 03:24:41,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2022-01-31 03:24:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 03:24:41,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:41,492 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:41,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-31 03:24:41,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:41,707 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash -508226475, now seen corresponding path program 32 times [2022-01-31 03:24:41,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:41,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720230089] [2022-01-31 03:24:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:41,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:41,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:41,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:41,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 03:24:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:42,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720230089] [2022-01-31 03:24:42,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720230089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769932445] [2022-01-31 03:24:42,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:24:42,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:42,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:42,287 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:42,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-31 03:24:42,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:24:42,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 03:24:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:43,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:45,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769932445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:45,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:45,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-01-31 03:24:45,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276825354] [2022-01-31 03:24:45,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:45,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 03:24:45,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 03:24:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 03:24:45,061 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:46,424 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2022-01-31 03:24:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 03:24:46,426 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-01-31 03:24:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:46,427 INFO L225 Difference]: With dead ends: 127 [2022-01-31 03:24:46,427 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 03:24:46,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12544 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 03:24:46,430 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 157 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:46,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 102 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:24:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 03:24:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-01-31 03:24:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 101 states have internal predecessors, (104), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-01-31 03:24:46,447 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 99 [2022-01-31 03:24:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:46,448 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-01-31 03:24:46,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-01-31 03:24:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 03:24:46,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:46,449 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:46,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-31 03:24:46,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-31 03:24:46,671 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:46,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1293415989, now seen corresponding path program 32 times [2022-01-31 03:24:46,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:46,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80743184] [2022-01-31 03:24:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:46,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:46,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:46,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:46,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 03:24:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:47,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80743184] [2022-01-31 03:24:47,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80743184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266887231] [2022-01-31 03:24:47,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:24:47,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:47,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:47,382 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:47,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-31 03:24:47,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:24:47,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:47,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 03:24:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:48,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:50,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266887231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:50,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:50,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-01-31 03:24:50,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407719701] [2022-01-31 03:24:50,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:50,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 03:24:50,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:50,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 03:24:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 03:24:50,099 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:51,486 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2022-01-31 03:24:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 03:24:51,486 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-01-31 03:24:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:51,487 INFO L225 Difference]: With dead ends: 121 [2022-01-31 03:24:51,487 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 03:24:51,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12437 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 03:24:51,489 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:51,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 125 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:24:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 03:24:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-01-31 03:24:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 100 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:51,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-01-31 03:24:51,500 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 99 [2022-01-31 03:24:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:51,500 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-01-31 03:24:51,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-01-31 03:24:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 03:24:51,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:51,501 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:51,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-31 03:24:51,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:51,715 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash -21010377, now seen corresponding path program 33 times [2022-01-31 03:24:51,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:51,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186794984] [2022-01-31 03:24:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:51,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:51,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:51,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:52,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 03:24:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:52,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:52,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186794984] [2022-01-31 03:24:52,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186794984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:52,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654517267] [2022-01-31 03:24:52,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:24:52,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:52,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:52,342 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:52,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-31 03:24:52,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-01-31 03:24:52,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:52,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 03:24:52,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:53,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:24:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:55,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654517267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:24:55,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:24:55,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-01-31 03:24:55,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544407982] [2022-01-31 03:24:55,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:24:55,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 03:24:55,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:24:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 03:24:55,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 03:24:55,447 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:24:57,215 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-01-31 03:24:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 03:24:57,216 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-01-31 03:24:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:24:57,216 INFO L225 Difference]: With dead ends: 134 [2022-01-31 03:24:57,216 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 03:24:57,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14066 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 03:24:57,218 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:24:57,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 112 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:24:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 03:24:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2022-01-31 03:24:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 103 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:24:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-01-31 03:24:57,240 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 101 [2022-01-31 03:24:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:24:57,240 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-01-31 03:24:57,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:24:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-01-31 03:24:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 03:24:57,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:24:57,241 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:24:57,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-31 03:24:57,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:57,443 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:24:57,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:24:57,444 INFO L85 PathProgramCache]: Analyzing trace with hash 174950259, now seen corresponding path program 33 times [2022-01-31 03:24:57,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:24:57,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136387804] [2022-01-31 03:24:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:24:57,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:24:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:57,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:24:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:57,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:24:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:57,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 03:24:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:24:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:58,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:24:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136387804] [2022-01-31 03:24:58,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136387804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:24:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291803399] [2022-01-31 03:24:58,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:24:58,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:24:58,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:24:58,188 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:24:58,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-31 03:24:58,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-01-31 03:24:58,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:24:58,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 03:24:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:24:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:24:59,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:01,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291803399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:01,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:01,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-01-31 03:25:01,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992591561] [2022-01-31 03:25:01,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:01,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 03:25:01,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:01,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 03:25:01,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 03:25:01,227 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:02,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:02,916 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2022-01-31 03:25:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 03:25:02,917 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-01-31 03:25:02,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:02,917 INFO L225 Difference]: With dead ends: 129 [2022-01-31 03:25:02,918 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 03:25:02,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14085 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 03:25:02,919 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:02,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:25:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 03:25:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-01-31 03:25:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.0576923076923077) internal successors, (110), 106 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2022-01-31 03:25:02,931 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 101 [2022-01-31 03:25:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:02,932 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2022-01-31 03:25:02,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2022-01-31 03:25:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 03:25:02,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:02,933 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:02,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-31 03:25:03,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-01-31 03:25:03,140 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1103746699, now seen corresponding path program 34 times [2022-01-31 03:25:03,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:03,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781566914] [2022-01-31 03:25:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:03,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:03,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:03,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:03,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 03:25:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:03,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:03,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781566914] [2022-01-31 03:25:03,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781566914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:03,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301845789] [2022-01-31 03:25:03,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:25:03,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:03,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:03,740 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:03,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-31 03:25:03,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:25:03,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:25:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-31 03:25:03,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:04,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:06,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301845789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:06,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:06,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-01-31 03:25:06,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454909627] [2022-01-31 03:25:06,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:06,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 03:25:06,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:06,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 03:25:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 03:25:06,690 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:08,176 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2022-01-31 03:25:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 03:25:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-01-31 03:25:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:08,177 INFO L225 Difference]: With dead ends: 131 [2022-01-31 03:25:08,177 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 03:25:08,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13875 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-01-31 03:25:08,178 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 148 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:08,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 112 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:25:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 03:25:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-01-31 03:25:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 105 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-01-31 03:25:08,195 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2022-01-31 03:25:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:08,196 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-01-31 03:25:08,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-01-31 03:25:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 03:25:08,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:08,197 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:08,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-31 03:25:08,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:08,421 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash -618165291, now seen corresponding path program 34 times [2022-01-31 03:25:08,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:08,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167113883] [2022-01-31 03:25:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:08,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:08,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:08,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:08,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 03:25:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:09,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167113883] [2022-01-31 03:25:09,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167113883] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693849797] [2022-01-31 03:25:09,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:25:09,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:09,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:09,136 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:09,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-31 03:25:09,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:25:09,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:25:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-31 03:25:09,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:10,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:12,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693849797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:12,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:12,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-01-31 03:25:12,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944515398] [2022-01-31 03:25:12,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:12,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 03:25:12,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:12,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 03:25:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 03:25:12,009 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:13,429 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-01-31 03:25:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 03:25:13,429 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-01-31 03:25:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:13,430 INFO L225 Difference]: With dead ends: 125 [2022-01-31 03:25:13,430 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 03:25:13,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13762 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-01-31 03:25:13,433 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:13,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 100 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:25:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 03:25:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-01-31 03:25:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 104 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-01-31 03:25:13,446 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 103 [2022-01-31 03:25:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:13,447 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-01-31 03:25:13,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-01-31 03:25:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 03:25:13,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:13,448 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:13,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-31 03:25:13,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:13,672 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1195382231, now seen corresponding path program 35 times [2022-01-31 03:25:13,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:13,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627390251] [2022-01-31 03:25:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:13,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:13,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:13,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:14,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 03:25:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:14,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:14,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627390251] [2022-01-31 03:25:14,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627390251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:14,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260302637] [2022-01-31 03:25:14,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:25:14,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:14,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:14,376 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:14,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-31 03:25:14,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-01-31 03:25:14,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:25:14,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-31 03:25:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:15,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:17,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260302637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:17,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:17,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-01-31 03:25:17,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565126377] [2022-01-31 03:25:17,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:17,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 03:25:17,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 03:25:17,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 03:25:17,769 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:19,532 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-01-31 03:25:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 03:25:19,533 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-01-31 03:25:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:19,533 INFO L225 Difference]: With dead ends: 138 [2022-01-31 03:25:19,533 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 03:25:19,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15474 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 03:25:19,536 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 209 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:19,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 127 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:25:19,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 03:25:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-01-31 03:25:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 107 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-01-31 03:25:19,559 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2022-01-31 03:25:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:19,559 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-01-31 03:25:19,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-01-31 03:25:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 03:25:19,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:19,560 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:19,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-31 03:25:19,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:19,775 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 555998611, now seen corresponding path program 35 times [2022-01-31 03:25:19,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:19,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814100462] [2022-01-31 03:25:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:19,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:19,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:19,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:20,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 03:25:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:20,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:20,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814100462] [2022-01-31 03:25:20,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814100462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:20,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69821961] [2022-01-31 03:25:20,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:25:20,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:20,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:20,544 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:20,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-31 03:25:20,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-01-31 03:25:20,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:25:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-31 03:25:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:21,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:23,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69821961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:23,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:23,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-01-31 03:25:23,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354635131] [2022-01-31 03:25:23,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:23,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 03:25:23,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 03:25:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 03:25:23,723 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:25,405 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2022-01-31 03:25:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 03:25:25,406 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-01-31 03:25:25,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:25,406 INFO L225 Difference]: With dead ends: 133 [2022-01-31 03:25:25,406 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 03:25:25,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15494 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 03:25:25,408 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:25,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 120 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:25:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 03:25:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2022-01-31 03:25:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 110 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-01-31 03:25:25,421 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 105 [2022-01-31 03:25:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:25,421 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-01-31 03:25:25,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-01-31 03:25:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 03:25:25,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:25,422 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:25,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-31 03:25:25,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-31 03:25:25,623 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 11499413, now seen corresponding path program 36 times [2022-01-31 03:25:25,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:25,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521297505] [2022-01-31 03:25:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:25,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:25,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:25,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:25,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 03:25:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:26,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:26,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521297505] [2022-01-31 03:25:26,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521297505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:26,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842944177] [2022-01-31 03:25:26,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:25:26,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:26,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:26,285 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:26,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-31 03:25:26,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-01-31 03:25:26,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:25:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-31 03:25:26,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:27,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:29,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842944177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:29,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:29,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-01-31 03:25:29,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483433373] [2022-01-31 03:25:29,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:29,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 03:25:29,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 03:25:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 03:25:29,464 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:30,997 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2022-01-31 03:25:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 03:25:30,997 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-01-31 03:25:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:30,998 INFO L225 Difference]: With dead ends: 135 [2022-01-31 03:25:30,998 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 03:25:30,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15273 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-01-31 03:25:30,999 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:30,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 107 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:25:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 03:25:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2022-01-31 03:25:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 109 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2022-01-31 03:25:31,016 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 107 [2022-01-31 03:25:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:31,016 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2022-01-31 03:25:31,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:31,017 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2022-01-31 03:25:31,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 03:25:31,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:31,017 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:31,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-31 03:25:31,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:31,229 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1517208971, now seen corresponding path program 36 times [2022-01-31 03:25:31,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:31,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426873280] [2022-01-31 03:25:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:31,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:31,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:31,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:31,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 03:25:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:32,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426873280] [2022-01-31 03:25:32,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426873280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68487230] [2022-01-31 03:25:32,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:25:32,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:32,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:32,019 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:32,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-31 03:25:32,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-01-31 03:25:32,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:25:32,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-31 03:25:32,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:33,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:35,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68487230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:35,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:35,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-01-31 03:25:35,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743117397] [2022-01-31 03:25:35,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:35,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 03:25:35,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 03:25:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 03:25:35,055 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:36,596 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2022-01-31 03:25:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 03:25:36,597 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-01-31 03:25:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:36,597 INFO L225 Difference]: With dead ends: 129 [2022-01-31 03:25:36,597 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 03:25:36,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15154 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-01-31 03:25:36,600 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 213 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:36,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 110 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:25:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 03:25:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-01-31 03:25:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 108 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-01-31 03:25:36,623 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 107 [2022-01-31 03:25:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:36,624 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-01-31 03:25:36,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-01-31 03:25:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 03:25:36,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:36,625 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:36,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-31 03:25:36,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:36,831 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:36,832 INFO L85 PathProgramCache]: Analyzing trace with hash 502832247, now seen corresponding path program 37 times [2022-01-31 03:25:36,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:36,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340998216] [2022-01-31 03:25:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:36,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:36,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:36,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:37,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 03:25:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:37,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:37,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340998216] [2022-01-31 03:25:37,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340998216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:37,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568367488] [2022-01-31 03:25:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:25:37,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:37,536 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:37,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-31 03:25:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:37,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 03:25:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:39,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:41,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568367488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:41,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:41,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-01-31 03:25:41,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2828926] [2022-01-31 03:25:41,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:41,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 03:25:41,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:41,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 03:25:41,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 03:25:41,049 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:42,939 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-01-31 03:25:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 03:25:42,940 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-01-31 03:25:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:42,940 INFO L225 Difference]: With dead ends: 142 [2022-01-31 03:25:42,941 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 03:25:42,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16949 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 03:25:42,943 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:42,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 132 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:25:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 03:25:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-01-31 03:25:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 111 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-01-31 03:25:42,961 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 109 [2022-01-31 03:25:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:42,961 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-01-31 03:25:42,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-01-31 03:25:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 03:25:42,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:42,962 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:42,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-31 03:25:43,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-31 03:25:43,163 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash 256502963, now seen corresponding path program 37 times [2022-01-31 03:25:43,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:43,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224282014] [2022-01-31 03:25:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:43,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:43,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:43,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 03:25:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:44,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224282014] [2022-01-31 03:25:44,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224282014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480676591] [2022-01-31 03:25:44,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:25:44,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:44,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:44,020 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:44,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-31 03:25:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 03:25:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:45,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:47,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480676591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:47,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:47,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-01-31 03:25:47,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321032088] [2022-01-31 03:25:47,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:47,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 03:25:47,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:47,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 03:25:47,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 03:25:47,388 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:49,126 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-01-31 03:25:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 03:25:49,126 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-01-31 03:25:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:49,127 INFO L225 Difference]: With dead ends: 137 [2022-01-31 03:25:49,127 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 03:25:49,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16970 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 03:25:49,129 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:49,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 90 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:25:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 03:25:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2022-01-31 03:25:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 114 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2022-01-31 03:25:49,148 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 109 [2022-01-31 03:25:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:49,148 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2022-01-31 03:25:49,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2022-01-31 03:25:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 03:25:49,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:49,149 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:49,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-31 03:25:49,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:49,362 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:49,363 INFO L85 PathProgramCache]: Analyzing trace with hash -41009483, now seen corresponding path program 38 times [2022-01-31 03:25:49,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:49,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436733890] [2022-01-31 03:25:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:49,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:49,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:49,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:49,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 03:25:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:50,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436733890] [2022-01-31 03:25:50,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436733890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201745678] [2022-01-31 03:25:50,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:25:50,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:50,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:50,067 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:50,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-31 03:25:50,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:25:50,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:25:50,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 03:25:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:51,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:53,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201745678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:53,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:53,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-01-31 03:25:53,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055338643] [2022-01-31 03:25:53,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:53,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 03:25:53,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 03:25:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 03:25:53,508 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:25:55,225 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2022-01-31 03:25:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 03:25:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-01-31 03:25:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:25:55,227 INFO L225 Difference]: With dead ends: 139 [2022-01-31 03:25:55,228 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 03:25:55,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16738 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 03:25:55,231 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:25:55,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 122 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:25:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 03:25:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-01-31 03:25:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 111 states have (on average 1.045045045045045) internal successors, (116), 113 states have internal predecessors, (116), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:25:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-01-31 03:25:55,251 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 111 [2022-01-31 03:25:55,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:25:55,252 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-01-31 03:25:55,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:25:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-01-31 03:25:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 03:25:55,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:25:55,253 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:25:55,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-31 03:25:55,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:55,467 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:25:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:25:55,468 INFO L85 PathProgramCache]: Analyzing trace with hash -271957483, now seen corresponding path program 38 times [2022-01-31 03:25:55,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:25:55,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493036047] [2022-01-31 03:25:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:25:55,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:25:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:55,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:25:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:55,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:25:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:55,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 03:25:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:25:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:56,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:25:56,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493036047] [2022-01-31 03:25:56,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493036047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:25:56,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68931182] [2022-01-31 03:25:56,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:25:56,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:25:56,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:25:56,308 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:25:56,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-31 03:25:56,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:25:56,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:25:56,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 03:25:56,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:25:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:57,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:25:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:25:59,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68931182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:25:59,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:25:59,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-01-31 03:25:59,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048138039] [2022-01-31 03:25:59,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:25:59,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 03:25:59,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:25:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 03:25:59,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 03:25:59,576 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:26:01,131 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2022-01-31 03:26:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 03:26:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-01-31 03:26:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:26:01,132 INFO L225 Difference]: With dead ends: 133 [2022-01-31 03:26:01,132 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 03:26:01,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16613 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 03:26:01,135 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 190 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:26:01,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 85 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:26:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 03:26:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-01-31 03:26:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 112 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:26:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-01-31 03:26:01,153 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 111 [2022-01-31 03:26:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:26:01,153 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-01-31 03:26:01,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-01-31 03:26:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 03:26:01,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:26:01,154 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:26:01,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-31 03:26:01,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:01,375 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:26:01,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:26:01,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1106363369, now seen corresponding path program 39 times [2022-01-31 03:26:01,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:26:01,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837862755] [2022-01-31 03:26:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:26:01,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:26:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:01,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:26:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:01,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:26:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:01,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 03:26:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:02,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:26:02,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837862755] [2022-01-31 03:26:02,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837862755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:26:02,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240292585] [2022-01-31 03:26:02,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:26:02,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:02,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:26:02,130 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:26:02,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-31 03:26:02,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-01-31 03:26:02,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:26:02,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-31 03:26:02,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:26:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:03,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:26:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:05,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240292585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:26:05,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:26:05,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-01-31 03:26:05,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196618416] [2022-01-31 03:26:05,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:26:05,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 03:26:05,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:26:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 03:26:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 03:26:05,919 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:26:07,943 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-01-31 03:26:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 03:26:07,944 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-01-31 03:26:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:26:07,944 INFO L225 Difference]: With dead ends: 146 [2022-01-31 03:26:07,944 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 03:26:07,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18491 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 03:26:07,948 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 229 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:26:07,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 112 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:26:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 03:26:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2022-01-31 03:26:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:26:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-01-31 03:26:07,969 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 113 [2022-01-31 03:26:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:26:07,969 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-01-31 03:26:07,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-01-31 03:26:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 03:26:07,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:26:07,970 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:26:07,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-31 03:26:08,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-31 03:26:08,189 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:26:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:26:08,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1584597805, now seen corresponding path program 39 times [2022-01-31 03:26:08,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:26:08,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775602068] [2022-01-31 03:26:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:26:08,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:26:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:08,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:26:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:08,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:26:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:08,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 03:26:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:09,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:26:09,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775602068] [2022-01-31 03:26:09,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775602068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:26:09,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400072703] [2022-01-31 03:26:09,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:26:09,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:09,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:26:09,146 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:26:09,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-31 03:26:09,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-01-31 03:26:09,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:26:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-31 03:26:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:26:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:10,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:26:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:12,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400072703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:26:12,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:26:12,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-01-31 03:26:12,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228849452] [2022-01-31 03:26:12,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:26:12,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 03:26:12,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:26:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 03:26:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 03:26:12,794 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:26:14,737 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2022-01-31 03:26:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 03:26:14,737 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-01-31 03:26:14,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:26:14,738 INFO L225 Difference]: With dead ends: 141 [2022-01-31 03:26:14,738 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 03:26:14,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18513 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 03:26:14,742 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 239 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:26:14,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 120 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:26:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 03:26:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2022-01-31 03:26:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.0517241379310345) internal successors, (122), 118 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:26:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2022-01-31 03:26:14,763 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 113 [2022-01-31 03:26:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:26:14,763 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2022-01-31 03:26:14,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2022-01-31 03:26:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 03:26:14,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:26:14,764 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:26:14,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-31 03:26:14,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:14,988 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:26:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:26:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 187678421, now seen corresponding path program 40 times [2022-01-31 03:26:14,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:26:14,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817708455] [2022-01-31 03:26:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:26:14,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:26:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:15,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:26:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:26:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:15,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 03:26:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:15,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:26:15,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817708455] [2022-01-31 03:26:15,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817708455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:26:15,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984818498] [2022-01-31 03:26:15,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:26:15,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:15,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:26:15,760 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:26:15,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-31 03:26:16,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:26:16,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:26:16,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-31 03:26:16,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:26:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:17,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:26:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:19,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984818498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:26:19,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:26:19,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-01-31 03:26:19,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340065758] [2022-01-31 03:26:19,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:26:19,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 03:26:19,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:26:19,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 03:26:19,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 03:26:19,440 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:26:21,325 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2022-01-31 03:26:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 03:26:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-01-31 03:26:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:26:21,326 INFO L225 Difference]: With dead ends: 143 [2022-01-31 03:26:21,326 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 03:26:21,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-01-31 03:26:21,328 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 174 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:26:21,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 102 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:26:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 03:26:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2022-01-31 03:26:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 117 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:26:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-01-31 03:26:21,350 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 115 [2022-01-31 03:26:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:26:21,350 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-01-31 03:26:21,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-01-31 03:26:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 03:26:21,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:26:21,351 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:26:21,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-31 03:26:21,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:21,575 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:26:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:26:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1563943605, now seen corresponding path program 40 times [2022-01-31 03:26:21,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:26:21,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917614304] [2022-01-31 03:26:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:26:21,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:26:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:21,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:26:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:21,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:26:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:21,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 03:26:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:22,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:26:22,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917614304] [2022-01-31 03:26:22,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917614304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:26:22,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118917050] [2022-01-31 03:26:22,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:26:22,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:22,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:26:22,488 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:26:22,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-31 03:26:22,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:26:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:26:22,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-31 03:26:22,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:26:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:24,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:26:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:25,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118917050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:26:25,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:26:25,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-01-31 03:26:25,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048951284] [2022-01-31 03:26:25,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:26:25,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 03:26:25,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:26:25,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 03:26:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 03:26:25,989 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:26:27,709 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-01-31 03:26:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 03:26:27,710 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-01-31 03:26:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:26:27,710 INFO L225 Difference]: With dead ends: 137 [2022-01-31 03:26:27,711 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 03:26:27,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-01-31 03:26:27,713 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 196 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:26:27,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 105 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:26:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 03:26:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-01-31 03:26:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 116 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:26:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-01-31 03:26:27,736 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 115 [2022-01-31 03:26:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:26:27,737 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-01-31 03:26:27,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-01-31 03:26:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 03:26:27,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:26:27,738 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:26:27,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-31 03:26:27,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-01-31 03:26:27,959 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:26:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:26:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2036976457, now seen corresponding path program 41 times [2022-01-31 03:26:27,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:26:27,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45257809] [2022-01-31 03:26:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:26:27,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:26:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:26:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:28,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:26:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:28,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 03:26:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:28,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:26:28,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45257809] [2022-01-31 03:26:28,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45257809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:26:28,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529223220] [2022-01-31 03:26:28,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:26:28,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:28,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:26:28,768 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:26:28,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-31 03:26:29,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-01-31 03:26:29,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:26:29,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-31 03:26:29,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:26:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:30,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:26:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:32,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529223220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:26:32,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:26:32,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-01-31 03:26:32,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613906112] [2022-01-31 03:26:32,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:26:32,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 03:26:32,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:26:32,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 03:26:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 03:26:32,853 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:26:34,864 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2022-01-31 03:26:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 03:26:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-01-31 03:26:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:26:34,865 INFO L225 Difference]: With dead ends: 150 [2022-01-31 03:26:34,865 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 03:26:34,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20100 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 03:26:34,868 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:26:34,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 102 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:26:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 03:26:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2022-01-31 03:26:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 119 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:26:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2022-01-31 03:26:34,883 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2022-01-31 03:26:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:26:34,883 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2022-01-31 03:26:34,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2022-01-31 03:26:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 03:26:34,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:26:34,884 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:26:34,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-31 03:26:35,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:35,099 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:26:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:26:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2037762573, now seen corresponding path program 41 times [2022-01-31 03:26:35,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:26:35,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510096858] [2022-01-31 03:26:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:26:35,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:26:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:35,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:26:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:35,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:26:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:35,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 03:26:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:36,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:26:36,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510096858] [2022-01-31 03:26:36,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510096858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:26:36,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435077015] [2022-01-31 03:26:36,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:26:36,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:36,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:26:36,100 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:26:36,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-31 03:26:36,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-01-31 03:26:36,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:26:36,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-31 03:26:36,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:26:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:37,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:26:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:39,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435077015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:26:39,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:26:39,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-01-31 03:26:39,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32919858] [2022-01-31 03:26:39,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:26:39,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 03:26:39,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:26:39,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 03:26:39,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 03:26:39,923 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:26:41,962 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2022-01-31 03:26:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 03:26:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-01-31 03:26:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:26:41,963 INFO L225 Difference]: With dead ends: 145 [2022-01-31 03:26:41,963 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 03:26:41,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20123 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 03:26:41,967 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 227 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:26:41,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 130 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:26:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 03:26:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2022-01-31 03:26:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.05) internal successors, (126), 122 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:26:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2022-01-31 03:26:41,983 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 117 [2022-01-31 03:26:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:26:41,983 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2022-01-31 03:26:41,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2022-01-31 03:26:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 03:26:41,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:26:41,984 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:26:42,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-31 03:26:42,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:42,185 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:26:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:26:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1511966731, now seen corresponding path program 42 times [2022-01-31 03:26:42,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:26:42,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377506244] [2022-01-31 03:26:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:26:42,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:26:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:42,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:26:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:42,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:26:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:42,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 03:26:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:42,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:26:42,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377506244] [2022-01-31 03:26:42,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377506244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:26:42,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702560844] [2022-01-31 03:26:42,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:26:42,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:42,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:26:42,968 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:26:42,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-31 03:26:43,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-01-31 03:26:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:26:43,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-31 03:26:43,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:26:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:44,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:26:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:46,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702560844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:26:46,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:26:46,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-01-31 03:26:46,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863330455] [2022-01-31 03:26:46,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:26:46,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 03:26:46,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:26:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 03:26:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 03:26:46,825 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:26:48,632 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2022-01-31 03:26:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 03:26:48,632 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-01-31 03:26:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:26:48,633 INFO L225 Difference]: With dead ends: 147 [2022-01-31 03:26:48,633 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 03:26:48,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19869 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-01-31 03:26:48,636 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:26:48,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 92 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:26:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 03:26:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-01-31 03:26:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 121 states have internal predecessors, (124), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:26:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-01-31 03:26:48,653 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 119 [2022-01-31 03:26:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:26:48,653 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-01-31 03:26:48,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-01-31 03:26:48,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 03:26:48,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:26:48,654 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:26:48,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-01-31 03:26:48,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-31 03:26:48,855 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:26:48,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:26:48,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1792058283, now seen corresponding path program 42 times [2022-01-31 03:26:48,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:26:48,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812935211] [2022-01-31 03:26:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:26:48,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:26:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:48,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:26:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:48,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:26:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:49,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 03:26:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:49,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:26:49,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812935211] [2022-01-31 03:26:49,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812935211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:26:49,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839609832] [2022-01-31 03:26:49,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:26:49,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:49,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:26:49,861 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:26:49,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-31 03:26:50,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-01-31 03:26:50,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:26:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-31 03:26:50,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:26:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:51,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:26:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:53,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839609832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:26:53,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:26:53,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-01-31 03:26:53,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883914466] [2022-01-31 03:26:53,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:26:53,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 03:26:53,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:26:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 03:26:53,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 03:26:53,572 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:26:55,350 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-01-31 03:26:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 03:26:55,350 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-01-31 03:26:55,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:26:55,351 INFO L225 Difference]: With dead ends: 141 [2022-01-31 03:26:55,351 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 03:26:55,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19732 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-01-31 03:26:55,354 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:26:55,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 100 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:26:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 03:26:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-01-31 03:26:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 120 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:26:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-01-31 03:26:55,372 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 119 [2022-01-31 03:26:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:26:55,372 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-01-31 03:26:55,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:26:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-01-31 03:26:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 03:26:55,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:26:55,374 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:26:55,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-31 03:26:55,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:55,585 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:26:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:26:55,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1634351529, now seen corresponding path program 43 times [2022-01-31 03:26:55,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:26:55,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782640804] [2022-01-31 03:26:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:26:55,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:26:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:55,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:26:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:26:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 03:26:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:56,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:26:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782640804] [2022-01-31 03:26:56,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782640804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:26:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275072216] [2022-01-31 03:26:56,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:26:56,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:26:56,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:26:56,406 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:26:56,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-31 03:26:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:26:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-31 03:26:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:26:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:26:58,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:27:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275072216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:27:00,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:27:00,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-01-31 03:27:00,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223542035] [2022-01-31 03:27:00,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:27:00,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-01-31 03:27:00,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:27:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-01-31 03:27:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 03:27:00,609 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:27:02,773 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2022-01-31 03:27:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 03:27:02,774 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-01-31 03:27:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:27:02,774 INFO L225 Difference]: With dead ends: 154 [2022-01-31 03:27:02,774 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 03:27:02,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21776 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 03:27:02,778 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:27:02,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 112 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:27:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 03:27:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-01-31 03:27:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 123 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:27:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2022-01-31 03:27:02,796 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 121 [2022-01-31 03:27:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:27:02,796 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2022-01-31 03:27:02,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2022-01-31 03:27:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 03:27:02,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:27:02,797 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:27:02,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-31 03:27:02,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:02,997 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:27:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:27:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1926164499, now seen corresponding path program 43 times [2022-01-31 03:27:02,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:27:02,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715237873] [2022-01-31 03:27:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:27:02,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:27:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:03,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:27:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:03,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:27:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:03,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 03:27:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:04,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:27:04,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715237873] [2022-01-31 03:27:04,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715237873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:27:04,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526290942] [2022-01-31 03:27:04,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:27:04,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:27:04,027 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:27:04,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-31 03:27:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:04,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-31 03:27:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:27:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:05,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:27:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:08,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526290942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:27:08,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:27:08,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-01-31 03:27:08,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461812905] [2022-01-31 03:27:08,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:27:08,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-01-31 03:27:08,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:27:08,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-01-31 03:27:08,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 03:27:08,013 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:10,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:27:10,029 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2022-01-31 03:27:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 03:27:10,029 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-01-31 03:27:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:27:10,030 INFO L225 Difference]: With dead ends: 149 [2022-01-31 03:27:10,030 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 03:27:10,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21800 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 03:27:10,034 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 210 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:27:10,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 80 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:27:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 03:27:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-01-31 03:27:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.0483870967741935) internal successors, (130), 126 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:27:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2022-01-31 03:27:10,050 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 121 [2022-01-31 03:27:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:27:10,051 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2022-01-31 03:27:10,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2022-01-31 03:27:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 03:27:10,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:27:10,052 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:27:10,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-31 03:27:10,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:10,275 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:27:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:27:10,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1814042091, now seen corresponding path program 44 times [2022-01-31 03:27:10,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:27:10,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952802251] [2022-01-31 03:27:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:27:10,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:27:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:10,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:27:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:10,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:27:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:10,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 03:27:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:11,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:27:11,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952802251] [2022-01-31 03:27:11,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952802251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:27:11,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986922013] [2022-01-31 03:27:11,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:27:11,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:11,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:27:11,101 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:27:11,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-31 03:27:11,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:27:11,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:27:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 03:27:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:27:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:12,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:27:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:15,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986922013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:27:15,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:27:15,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-01-31 03:27:15,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362734873] [2022-01-31 03:27:15,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:27:15,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-01-31 03:27:15,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:27:15,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-01-31 03:27:15,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 03:27:15,264 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:27:17,227 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2022-01-31 03:27:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 03:27:17,228 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-01-31 03:27:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:27:17,228 INFO L225 Difference]: With dead ends: 151 [2022-01-31 03:27:17,228 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 03:27:17,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21535 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-01-31 03:27:17,233 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:27:17,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 92 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:27:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 03:27:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2022-01-31 03:27:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 125 states have internal predecessors, (128), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:27:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-01-31 03:27:17,257 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 123 [2022-01-31 03:27:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:27:17,257 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-01-31 03:27:17,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-01-31 03:27:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 03:27:17,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:27:17,258 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:27:17,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-31 03:27:17,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-01-31 03:27:17,475 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:27:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:27:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash -420090123, now seen corresponding path program 44 times [2022-01-31 03:27:17,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:27:17,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821582106] [2022-01-31 03:27:17,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:27:17,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:27:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:17,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:27:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:17,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:27:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:17,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 03:27:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:18,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:27:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821582106] [2022-01-31 03:27:18,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821582106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:27:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742575533] [2022-01-31 03:27:18,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:27:18,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:18,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:27:18,532 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:27:18,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-31 03:27:18,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:27:18,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:27:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 03:27:18,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:27:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:27:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:22,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742575533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:27:22,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:27:22,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-01-31 03:27:22,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861185329] [2022-01-31 03:27:22,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:27:22,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-01-31 03:27:22,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:27:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-01-31 03:27:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 03:27:22,512 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:27:24,368 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2022-01-31 03:27:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 03:27:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-01-31 03:27:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:27:24,369 INFO L225 Difference]: With dead ends: 145 [2022-01-31 03:27:24,369 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 03:27:24,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21392 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-01-31 03:27:24,371 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 254 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:27:24,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 70 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:27:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 03:27:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-01-31 03:27:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 124 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:27:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-01-31 03:27:24,388 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 123 [2022-01-31 03:27:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:27:24,388 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-01-31 03:27:24,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-01-31 03:27:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 03:27:24,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:27:24,389 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:27:24,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-31 03:27:24,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:24,589 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:27:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:27:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1727909641, now seen corresponding path program 45 times [2022-01-31 03:27:24,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:27:24,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234050097] [2022-01-31 03:27:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:27:24,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:27:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:24,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:27:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:24,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:27:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:25,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 03:27:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:25,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:27:25,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234050097] [2022-01-31 03:27:25,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234050097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:27:25,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495972961] [2022-01-31 03:27:25,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:27:25,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:25,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:27:25,477 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:27:25,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-31 03:27:25,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-01-31 03:27:25,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:27:25,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 03:27:25,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:27:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:27,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:27:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:30,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495972961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:27:30,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:27:30,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-01-31 03:27:30,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835668416] [2022-01-31 03:27:30,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:27:30,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-01-31 03:27:30,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:27:30,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-01-31 03:27:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 03:27:30,147 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:32,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:27:32,463 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-01-31 03:27:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 03:27:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-01-31 03:27:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:27:32,464 INFO L225 Difference]: With dead ends: 158 [2022-01-31 03:27:32,464 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 03:27:32,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23519 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 03:27:32,467 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:27:32,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 127 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:27:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 03:27:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2022-01-31 03:27:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.04) internal successors, (130), 127 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:27:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-01-31 03:27:32,484 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 125 [2022-01-31 03:27:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:27:32,484 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-01-31 03:27:32,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:32,484 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-01-31 03:27:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 03:27:32,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:27:32,485 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:27:32,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-31 03:27:32,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:32,686 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:27:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:27:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1155031859, now seen corresponding path program 45 times [2022-01-31 03:27:32,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:27:32,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207688046] [2022-01-31 03:27:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:27:32,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:27:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:32,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:27:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:32,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:27:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:33,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 03:27:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:33,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:27:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207688046] [2022-01-31 03:27:33,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207688046] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:27:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932916415] [2022-01-31 03:27:33,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:27:33,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:27:33,822 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:27:33,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-31 03:27:34,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-01-31 03:27:34,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:27:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 03:27:34,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:27:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:35,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:27:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:38,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932916415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:27:38,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:27:38,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-01-31 03:27:38,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214044873] [2022-01-31 03:27:38,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:27:38,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-01-31 03:27:38,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:27:38,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-01-31 03:27:38,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 03:27:38,096 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:27:40,230 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-01-31 03:27:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 03:27:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-01-31 03:27:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:27:40,231 INFO L225 Difference]: With dead ends: 153 [2022-01-31 03:27:40,231 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 03:27:40,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23544 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 03:27:40,235 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:27:40,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 75 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:27:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 03:27:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-01-31 03:27:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.046875) internal successors, (134), 130 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:27:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2022-01-31 03:27:40,261 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 125 [2022-01-31 03:27:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:27:40,261 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2022-01-31 03:27:40,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2022-01-31 03:27:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 03:27:40,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:27:40,262 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:27:40,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-31 03:27:40,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:40,483 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:27:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:27:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash 156833077, now seen corresponding path program 46 times [2022-01-31 03:27:40,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:27:40,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566338498] [2022-01-31 03:27:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:27:40,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:27:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:40,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:27:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:40,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:27:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:40,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 03:27:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:41,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:27:41,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566338498] [2022-01-31 03:27:41,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566338498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:27:41,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949752284] [2022-01-31 03:27:41,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:27:41,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:41,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:27:41,390 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:27:41,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-31 03:27:41,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:27:41,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:27:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-31 03:27:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:27:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:43,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:27:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:45,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949752284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:27:45,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:27:45,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-01-31 03:27:45,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170084281] [2022-01-31 03:27:45,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:27:45,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-31 03:27:45,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:27:45,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-31 03:27:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 03:27:45,795 INFO L87 Difference]: Start difference. First operand 140 states and 145 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:27:47,935 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2022-01-31 03:27:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 03:27:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-01-31 03:27:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:27:47,936 INFO L225 Difference]: With dead ends: 155 [2022-01-31 03:27:47,937 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 03:27:47,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23268 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-01-31 03:27:47,941 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 166 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:27:47,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 117 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:27:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 03:27:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2022-01-31 03:27:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 129 states have internal predecessors, (132), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:27:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2022-01-31 03:27:47,967 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 127 [2022-01-31 03:27:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:27:47,967 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2022-01-31 03:27:47,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2022-01-31 03:27:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 03:27:47,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:27:47,968 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:27:47,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-31 03:27:48,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:48,187 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:27:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:27:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash -306128235, now seen corresponding path program 46 times [2022-01-31 03:27:48,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:27:48,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042801231] [2022-01-31 03:27:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:27:48,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:27:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:48,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:27:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:48,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:27:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:48,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 03:27:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:49,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:27:49,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042801231] [2022-01-31 03:27:49,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042801231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:27:49,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408047831] [2022-01-31 03:27:49,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:27:49,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:49,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:27:49,296 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:27:49,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-31 03:27:49,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:27:49,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:27:49,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-31 03:27:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:27:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:51,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:27:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:53,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408047831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:27:53,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:27:53,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-01-31 03:27:53,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467648069] [2022-01-31 03:27:53,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:27:53,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-31 03:27:53,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:27:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-31 03:27:53,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 03:27:53,464 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:27:55,625 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-01-31 03:27:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 03:27:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-01-31 03:27:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:27:55,626 INFO L225 Difference]: With dead ends: 149 [2022-01-31 03:27:55,626 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 03:27:55,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23119 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-01-31 03:27:55,629 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:27:55,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 110 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:27:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 03:27:55,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-01-31 03:27:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 128 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:27:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-01-31 03:27:55,647 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 127 [2022-01-31 03:27:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:27:55,647 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-01-31 03:27:55,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:27:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-01-31 03:27:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 03:27:55,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:27:55,648 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:27:55,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-31 03:27:55,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-01-31 03:27:55,855 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:27:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:27:55,856 INFO L85 PathProgramCache]: Analyzing trace with hash 415282327, now seen corresponding path program 47 times [2022-01-31 03:27:55,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:27:55,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384489522] [2022-01-31 03:27:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:27:55,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:27:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:55,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:27:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:55,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:27:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:56,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 03:27:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:27:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:56,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:27:56,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384489522] [2022-01-31 03:27:56,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384489522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:27:56,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179666215] [2022-01-31 03:27:56,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:27:56,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:27:56,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:27:56,801 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:27:56,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-31 03:27:57,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-01-31 03:27:57,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:27:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-31 03:27:57,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:27:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:27:58,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:28:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179666215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:28:01,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:28:01,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-01-31 03:28:01,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171488230] [2022-01-31 03:28:01,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:28:01,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-01-31 03:28:01,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:28:01,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-01-31 03:28:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 03:28:01,547 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:28:04,020 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2022-01-31 03:28:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 03:28:04,020 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-01-31 03:28:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:28:04,021 INFO L225 Difference]: With dead ends: 162 [2022-01-31 03:28:04,021 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 03:28:04,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25329 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 03:28:04,023 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:28:04,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 112 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:28:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 03:28:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2022-01-31 03:28:04,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 131 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:28:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-01-31 03:28:04,041 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 129 [2022-01-31 03:28:04,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:28:04,041 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-01-31 03:28:04,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:04,041 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-01-31 03:28:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 03:28:04,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:28:04,042 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:28:04,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-31 03:28:04,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-31 03:28:04,242 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:28:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:28:04,243 INFO L85 PathProgramCache]: Analyzing trace with hash 689164115, now seen corresponding path program 47 times [2022-01-31 03:28:04,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:28:04,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607411246] [2022-01-31 03:28:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:28:04,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:28:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:04,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:28:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:28:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:04,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 03:28:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:05,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:28:05,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607411246] [2022-01-31 03:28:05,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607411246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:28:05,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240382957] [2022-01-31 03:28:05,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:28:05,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:05,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:28:05,445 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:28:05,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-31 03:28:05,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-01-31 03:28:05,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:28:05,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-31 03:28:05,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:28:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:07,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:28:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:09,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240382957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:28:09,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:28:09,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-01-31 03:28:09,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308639968] [2022-01-31 03:28:09,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:28:09,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-01-31 03:28:09,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:28:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-01-31 03:28:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 03:28:09,978 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:28:12,475 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2022-01-31 03:28:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 03:28:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-01-31 03:28:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:28:12,476 INFO L225 Difference]: With dead ends: 157 [2022-01-31 03:28:12,476 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 03:28:12,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25355 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 03:28:12,479 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 03:28:12,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 155 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 03:28:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 03:28:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2022-01-31 03:28:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.0454545454545454) internal successors, (138), 134 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:28:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2022-01-31 03:28:12,502 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 129 [2022-01-31 03:28:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:28:12,502 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2022-01-31 03:28:12,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2022-01-31 03:28:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 03:28:12,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:28:12,503 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:28:12,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-31 03:28:12,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-31 03:28:12,704 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:28:12,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:28:12,704 INFO L85 PathProgramCache]: Analyzing trace with hash -865470123, now seen corresponding path program 48 times [2022-01-31 03:28:12,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:28:12,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060601563] [2022-01-31 03:28:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:28:12,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:28:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:12,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:28:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:12,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:28:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:13,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 03:28:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:13,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:28:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060601563] [2022-01-31 03:28:13,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060601563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:28:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734563207] [2022-01-31 03:28:13,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:28:13,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:28:13,651 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:28:13,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-31 03:28:14,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-01-31 03:28:14,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:28:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-31 03:28:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:28:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:15,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:28:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:18,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734563207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:28:18,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:28:18,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-01-31 03:28:18,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956920003] [2022-01-31 03:28:18,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:28:18,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-01-31 03:28:18,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:28:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-01-31 03:28:18,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 03:28:18,282 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:28:20,486 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2022-01-31 03:28:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 03:28:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-01-31 03:28:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:28:20,487 INFO L225 Difference]: With dead ends: 159 [2022-01-31 03:28:20,488 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 03:28:20,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25068 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-01-31 03:28:20,493 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:28:20,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 97 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:28:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 03:28:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2022-01-31 03:28:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 133 states have internal predecessors, (136), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:28:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-01-31 03:28:20,512 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 131 [2022-01-31 03:28:20,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:28:20,512 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-01-31 03:28:20,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-01-31 03:28:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 03:28:20,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:28:20,513 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:28:20,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-31 03:28:20,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:20,716 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:28:20,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:28:20,717 INFO L85 PathProgramCache]: Analyzing trace with hash 884301621, now seen corresponding path program 48 times [2022-01-31 03:28:20,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:28:20,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834885057] [2022-01-31 03:28:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:28:20,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:28:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:20,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:28:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:20,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:28:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:21,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 03:28:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:21,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:28:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834885057] [2022-01-31 03:28:21,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834885057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:28:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708123526] [2022-01-31 03:28:21,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:28:21,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:21,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:28:21,888 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:28:21,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-31 03:28:22,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-01-31 03:28:22,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:28:22,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-31 03:28:22,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:28:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:23,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:28:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:26,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708123526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:28:26,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:28:26,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-01-31 03:28:26,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302016938] [2022-01-31 03:28:26,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:28:26,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-01-31 03:28:26,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:28:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-01-31 03:28:26,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 03:28:26,403 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:28:28,557 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2022-01-31 03:28:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 03:28:28,557 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-01-31 03:28:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:28:28,558 INFO L225 Difference]: With dead ends: 153 [2022-01-31 03:28:28,558 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 03:28:28,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24913 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-01-31 03:28:28,561 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:28:28,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 105 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:28:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 03:28:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-01-31 03:28:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 132 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:28:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-01-31 03:28:28,580 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 131 [2022-01-31 03:28:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:28:28,580 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-01-31 03:28:28,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-01-31 03:28:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 03:28:28,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:28:28,581 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:28:28,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-31 03:28:28,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-31 03:28:28,782 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:28:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:28:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1957073207, now seen corresponding path program 49 times [2022-01-31 03:28:28,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:28:28,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874872727] [2022-01-31 03:28:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:28:28,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:28:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:28,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:28:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:28,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:28:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:29,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 03:28:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:29,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:28:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874872727] [2022-01-31 03:28:29,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874872727] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:28:29,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702513553] [2022-01-31 03:28:29,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:28:29,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:29,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:28:29,781 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:28:29,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-31 03:28:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:30,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-31 03:28:30,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:28:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:31,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:28:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:34,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702513553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:28:34,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:28:34,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-01-31 03:28:34,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853577166] [2022-01-31 03:28:34,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:28:34,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-01-31 03:28:34,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:28:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-01-31 03:28:34,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 03:28:34,858 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:28:37,487 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-01-31 03:28:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 03:28:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-01-31 03:28:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:28:37,496 INFO L225 Difference]: With dead ends: 166 [2022-01-31 03:28:37,496 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 03:28:37,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27206 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 03:28:37,501 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 213 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 03:28:37,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 137 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 03:28:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 03:28:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2022-01-31 03:28:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 133 states have (on average 1.037593984962406) internal successors, (138), 135 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:28:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2022-01-31 03:28:37,529 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 133 [2022-01-31 03:28:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:28:37,529 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2022-01-31 03:28:37,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2022-01-31 03:28:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 03:28:37,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:28:37,530 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:28:37,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-31 03:28:37,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-31 03:28:37,743 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:28:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:28:37,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1109494669, now seen corresponding path program 49 times [2022-01-31 03:28:37,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:28:37,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533713461] [2022-01-31 03:28:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:28:37,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:28:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:37,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:28:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:37,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:28:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:38,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 03:28:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:39,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:28:39,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533713461] [2022-01-31 03:28:39,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533713461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:28:39,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252576440] [2022-01-31 03:28:39,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:28:39,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:39,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:28:39,002 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:28:39,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-31 03:28:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:39,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-31 03:28:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:28:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:41,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:28:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:43,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252576440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:28:43,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:28:43,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-01-31 03:28:43,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493383043] [2022-01-31 03:28:43,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:28:43,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-01-31 03:28:43,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:28:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-01-31 03:28:43,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 03:28:43,791 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:28:46,154 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2022-01-31 03:28:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 03:28:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-01-31 03:28:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:28:46,155 INFO L225 Difference]: With dead ends: 161 [2022-01-31 03:28:46,155 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 03:28:46,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27233 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 03:28:46,158 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:28:46,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 90 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:28:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 03:28:46,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-01-31 03:28:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 138 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:28:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2022-01-31 03:28:46,185 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 133 [2022-01-31 03:28:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:28:46,185 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2022-01-31 03:28:46,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2022-01-31 03:28:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 03:28:46,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:28:46,186 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:28:46,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-31 03:28:46,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:46,398 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:28:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:28:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1495258741, now seen corresponding path program 50 times [2022-01-31 03:28:46,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:28:46,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60763304] [2022-01-31 03:28:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:28:46,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:28:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:46,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:28:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:46,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:28:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:46,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 03:28:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:47,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:28:47,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60763304] [2022-01-31 03:28:47,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60763304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:28:47,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018444119] [2022-01-31 03:28:47,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:28:47,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:47,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:28:47,392 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:28:47,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-31 03:28:47,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:28:47,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:28:47,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-31 03:28:47,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:28:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:49,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:28:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:52,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018444119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:28:52,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:28:52,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-01-31 03:28:52,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588392830] [2022-01-31 03:28:52,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:28:52,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-01-31 03:28:52,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:28:52,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-01-31 03:28:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-01-31 03:28:52,267 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:28:54,751 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2022-01-31 03:28:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 03:28:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-01-31 03:28:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:28:54,752 INFO L225 Difference]: With dead ends: 163 [2022-01-31 03:28:54,752 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 03:28:54,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26935 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-01-31 03:28:54,755 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:28:54,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 127 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:28:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 03:28:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2022-01-31 03:28:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.037037037037037) internal successors, (140), 137 states have internal predecessors, (140), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:28:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2022-01-31 03:28:54,775 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 135 [2022-01-31 03:28:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:28:54,775 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2022-01-31 03:28:54,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:28:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2022-01-31 03:28:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 03:28:54,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:28:54,775 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:28:54,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-31 03:28:54,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:54,976 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:28:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:28:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash -622281515, now seen corresponding path program 50 times [2022-01-31 03:28:54,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:28:54,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926200150] [2022-01-31 03:28:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:28:54,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:28:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:55,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:28:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:55,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:28:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:55,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 03:28:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:28:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:56,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:28:56,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926200150] [2022-01-31 03:28:56,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926200150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:28:56,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264197070] [2022-01-31 03:28:56,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:28:56,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:28:56,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:28:56,252 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:28:56,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-31 03:28:56,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:28:56,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:28:56,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-31 03:28:56,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:28:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:28:58,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:29:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:01,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264197070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:29:01,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:29:01,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-01-31 03:29:01,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907855659] [2022-01-31 03:29:01,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:29:01,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-01-31 03:29:01,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:29:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-01-31 03:29:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-01-31 03:29:01,008 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:29:03,397 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2022-01-31 03:29:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 03:29:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-01-31 03:29:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:29:03,398 INFO L225 Difference]: With dead ends: 157 [2022-01-31 03:29:03,398 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 03:29:03,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26774 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-01-31 03:29:03,402 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 200 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:29:03,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 125 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:29:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 03:29:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-01-31 03:29:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 136 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:29:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-01-31 03:29:03,432 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 135 [2022-01-31 03:29:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:29:03,432 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-01-31 03:29:03,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-01-31 03:29:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 03:29:03,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:29:03,433 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:29:03,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-31 03:29:03,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-31 03:29:03,651 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:29:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:29:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1534658263, now seen corresponding path program 51 times [2022-01-31 03:29:03,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:29:03,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560011964] [2022-01-31 03:29:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:29:03,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:29:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:03,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:29:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:03,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:29:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:04,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 03:29:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:04,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:29:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560011964] [2022-01-31 03:29:04,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560011964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:29:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212504876] [2022-01-31 03:29:04,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:29:04,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:29:04,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:29:04,714 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:29:04,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-31 03:29:05,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-01-31 03:29:05,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:29:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-31 03:29:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:29:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:07,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:29:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:10,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212504876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:29:10,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:29:10,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-01-31 03:29:10,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055827222] [2022-01-31 03:29:10,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:29:10,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-01-31 03:29:10,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:29:10,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-01-31 03:29:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 03:29:10,169 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:29:12,932 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2022-01-31 03:29:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 03:29:12,932 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-01-31 03:29:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:29:12,932 INFO L225 Difference]: With dead ends: 170 [2022-01-31 03:29:12,933 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 03:29:12,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29150 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 03:29:12,935 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 03:29:12,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 142 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 03:29:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 03:29:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2022-01-31 03:29:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 139 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:29:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-01-31 03:29:12,966 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 137 [2022-01-31 03:29:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:29:12,966 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-01-31 03:29:12,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-01-31 03:29:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 03:29:12,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:29:12,967 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:29:12,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-31 03:29:13,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:29:13,184 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:29:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:29:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash 931500691, now seen corresponding path program 51 times [2022-01-31 03:29:13,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:29:13,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530087535] [2022-01-31 03:29:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:29:13,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:29:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:29:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:13,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:29:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:13,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 03:29:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:14,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:29:14,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530087535] [2022-01-31 03:29:14,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530087535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:29:14,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466939061] [2022-01-31 03:29:14,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:29:14,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:29:14,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:29:14,525 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:29:14,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-31 03:29:14,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-01-31 03:29:14,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:29:14,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-31 03:29:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:29:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:16,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:29:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:19,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466939061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:29:19,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:29:19,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-01-31 03:29:19,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390713798] [2022-01-31 03:29:19,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:29:19,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-01-31 03:29:19,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:29:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-01-31 03:29:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 03:29:19,655 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:29:22,307 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-01-31 03:29:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 03:29:22,308 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-01-31 03:29:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:29:22,308 INFO L225 Difference]: With dead ends: 165 [2022-01-31 03:29:22,308 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 03:29:22,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29178 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 03:29:22,311 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:29:22,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 110 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:29:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 03:29:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-01-31 03:29:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 140 states have (on average 1.042857142857143) internal successors, (146), 142 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:29:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2022-01-31 03:29:22,332 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 137 [2022-01-31 03:29:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:29:22,332 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2022-01-31 03:29:22,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2022-01-31 03:29:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 03:29:22,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:29:22,333 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:29:22,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-31 03:29:22,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:29:22,535 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:29:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:29:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash 91745429, now seen corresponding path program 52 times [2022-01-31 03:29:22,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:29:22,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089836560] [2022-01-31 03:29:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:29:22,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:29:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:22,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:29:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:22,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:29:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 03:29:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:23,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:29:23,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089836560] [2022-01-31 03:29:23,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089836560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:29:23,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549391718] [2022-01-31 03:29:23,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:29:23,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:29:23,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:29:23,614 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:29:23,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-31 03:29:24,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:29:24,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:29:24,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 03:29:24,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:29:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:25,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:29:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:28,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549391718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:29:28,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:29:28,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-01-31 03:29:28,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215048158] [2022-01-31 03:29:28,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:29:28,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-01-31 03:29:28,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:29:28,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-01-31 03:29:28,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-01-31 03:29:28,874 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:29:31,334 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2022-01-31 03:29:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 03:29:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-01-31 03:29:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:29:31,335 INFO L225 Difference]: With dead ends: 167 [2022-01-31 03:29:31,335 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 03:29:31,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28869 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-01-31 03:29:31,338 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 179 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:29:31,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 127 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:29:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 03:29:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-01-31 03:29:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 141 states have internal predecessors, (144), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:29:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-01-31 03:29:31,359 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 139 [2022-01-31 03:29:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:29:31,359 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-01-31 03:29:31,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-01-31 03:29:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 03:29:31,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:29:31,360 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:29:31,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-31 03:29:31,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-01-31 03:29:31,561 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:29:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:29:31,561 INFO L85 PathProgramCache]: Analyzing trace with hash 929051509, now seen corresponding path program 52 times [2022-01-31 03:29:31,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:29:31,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984913164] [2022-01-31 03:29:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:29:31,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:29:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:31,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:29:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:31,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:29:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 03:29:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:32,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:29:32,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984913164] [2022-01-31 03:29:32,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984913164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:29:32,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598529171] [2022-01-31 03:29:32,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:29:32,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:29:32,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:29:32,867 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:29:32,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-31 03:29:33,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:29:33,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:29:33,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 03:29:33,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:29:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:35,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:29:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:37,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598529171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:29:37,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:29:37,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-01-31 03:29:37,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902963631] [2022-01-31 03:29:37,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:29:37,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-01-31 03:29:37,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:29:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-01-31 03:29:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-01-31 03:29:37,772 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:29:40,288 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-01-31 03:29:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 03:29:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-01-31 03:29:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:29:40,289 INFO L225 Difference]: With dead ends: 161 [2022-01-31 03:29:40,289 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 03:29:40,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28702 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-01-31 03:29:40,292 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 217 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:29:40,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 135 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:29:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 03:29:40,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-01-31 03:29:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 140 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:29:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-01-31 03:29:40,312 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 139 [2022-01-31 03:29:40,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:29:40,312 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-01-31 03:29:40,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:40,313 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-01-31 03:29:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 03:29:40,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:29:40,313 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:29:40,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-31 03:29:40,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:29:40,514 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:29:40,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:29:40,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2012042615, now seen corresponding path program 53 times [2022-01-31 03:29:40,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:29:40,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197965050] [2022-01-31 03:29:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:29:40,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:29:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:40,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:29:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:40,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:29:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:41,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 03:29:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:41,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:29:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197965050] [2022-01-31 03:29:41,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197965050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:29:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257937909] [2022-01-31 03:29:41,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:29:41,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:29:41,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:29:41,673 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:29:41,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-31 03:29:42,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-01-31 03:29:42,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:29:42,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-31 03:29:42,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:29:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:44,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:29:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:47,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257937909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:29:47,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:29:47,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-01-31 03:29:47,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157448799] [2022-01-31 03:29:47,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:29:47,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-01-31 03:29:47,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:29:47,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-01-31 03:29:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 03:29:47,263 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:29:50,153 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-01-31 03:29:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 03:29:50,153 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-01-31 03:29:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:29:50,154 INFO L225 Difference]: With dead ends: 174 [2022-01-31 03:29:50,154 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 03:29:50,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31161 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 03:29:50,157 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 233 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 03:29:50,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 122 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 03:29:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 03:29:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 153. [2022-01-31 03:29:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 143 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:29:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2022-01-31 03:29:50,179 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 141 [2022-01-31 03:29:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:29:50,179 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2022-01-31 03:29:50,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2022-01-31 03:29:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 03:29:50,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:29:50,180 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:29:50,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-31 03:29:50,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-31 03:29:50,380 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:29:50,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:29:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2075760205, now seen corresponding path program 53 times [2022-01-31 03:29:50,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:29:50,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102285499] [2022-01-31 03:29:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:29:50,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:29:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:50,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:29:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:50,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:29:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:50,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 03:29:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:29:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:51,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:29:51,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102285499] [2022-01-31 03:29:51,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102285499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:29:51,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034750091] [2022-01-31 03:29:51,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:29:51,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:29:51,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:29:51,817 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:29:51,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-31 03:29:52,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-01-31 03:29:52,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:29:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-31 03:29:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:29:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:54,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:29:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:29:57,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034750091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:29:57,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:29:57,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-01-31 03:29:57,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586821772] [2022-01-31 03:29:57,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:29:57,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-01-31 03:29:57,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:29:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-01-31 03:29:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 03:29:57,106 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:29:59,826 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2022-01-31 03:29:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 03:29:59,826 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-01-31 03:29:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:29:59,827 INFO L225 Difference]: With dead ends: 169 [2022-01-31 03:29:59,827 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 03:29:59,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31190 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 03:29:59,831 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 221 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:29:59,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 105 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:29:59,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 03:29:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2022-01-31 03:29:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 144 states have (on average 1.0416666666666667) internal successors, (150), 146 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:29:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2022-01-31 03:29:59,852 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 141 [2022-01-31 03:29:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:29:59,853 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2022-01-31 03:29:59,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:29:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2022-01-31 03:29:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 03:29:59,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:29:59,853 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:29:59,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-31 03:30:00,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:00,054 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:30:00,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:30:00,054 INFO L85 PathProgramCache]: Analyzing trace with hash 627014581, now seen corresponding path program 54 times [2022-01-31 03:30:00,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:30:00,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312378470] [2022-01-31 03:30:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:30:00,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:30:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:00,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:30:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:00,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:30:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:00,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 03:30:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:01,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:30:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312378470] [2022-01-31 03:30:01,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312378470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:30:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604941921] [2022-01-31 03:30:01,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:30:01,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:01,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:30:01,155 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:30:01,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-31 03:30:01,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-01-31 03:30:01,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:30:01,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-31 03:30:01,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:30:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:03,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:30:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:06,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604941921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:30:06,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:30:06,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-01-31 03:30:06,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259091840] [2022-01-31 03:30:06,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:30:06,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-01-31 03:30:06,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:30:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-01-31 03:30:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 03:30:06,587 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:30:09,010 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2022-01-31 03:30:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 03:30:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-01-31 03:30:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:30:09,011 INFO L225 Difference]: With dead ends: 171 [2022-01-31 03:30:09,011 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 03:30:09,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30870 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-01-31 03:30:09,015 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:30:09,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 92 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:30:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 03:30:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2022-01-31 03:30:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 143 states have (on average 1.034965034965035) internal successors, (148), 145 states have internal predecessors, (148), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:30:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2022-01-31 03:30:09,037 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 143 [2022-01-31 03:30:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:30:09,038 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2022-01-31 03:30:09,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2022-01-31 03:30:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 03:30:09,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:30:09,039 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:30:09,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-31 03:30:09,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-31 03:30:09,263 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:30:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:30:09,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2098266901, now seen corresponding path program 54 times [2022-01-31 03:30:09,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:30:09,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699128558] [2022-01-31 03:30:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:30:09,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:30:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:09,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:30:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:09,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:30:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:09,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 03:30:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:10,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:30:10,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699128558] [2022-01-31 03:30:10,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699128558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:30:10,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216784160] [2022-01-31 03:30:10,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:30:10,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:10,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:30:10,650 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:30:10,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-31 03:30:11,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-01-31 03:30:11,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:30:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-31 03:30:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:30:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:12,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:30:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:15,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216784160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:30:15,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:30:15,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-01-31 03:30:15,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586346761] [2022-01-31 03:30:15,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:30:15,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-01-31 03:30:15,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:30:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-01-31 03:30:15,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 03:30:15,750 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:18,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:30:18,260 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2022-01-31 03:30:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 03:30:18,261 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-01-31 03:30:18,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:30:18,261 INFO L225 Difference]: With dead ends: 165 [2022-01-31 03:30:18,261 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 03:30:18,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30697 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-01-31 03:30:18,266 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:30:18,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 120 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:30:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 03:30:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-01-31 03:30:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.028169014084507) internal successors, (146), 144 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:30:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-01-31 03:30:18,302 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 143 [2022-01-31 03:30:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:30:18,302 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-01-31 03:30:18,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-01-31 03:30:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 03:30:18,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:30:18,303 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:30:18,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-31 03:30:18,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-31 03:30:18,503 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:30:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:30:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash 346602775, now seen corresponding path program 55 times [2022-01-31 03:30:18,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:30:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716087168] [2022-01-31 03:30:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:30:18,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:30:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:18,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:30:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:18,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:30:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:19,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 03:30:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:19,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:30:19,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716087168] [2022-01-31 03:30:19,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716087168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:30:19,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908616590] [2022-01-31 03:30:19,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:30:19,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:19,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:30:19,613 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:30:19,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-31 03:30:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-31 03:30:20,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:30:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:22,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:30:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:25,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908616590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:30:25,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:30:25,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-01-31 03:30:25,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26032286] [2022-01-31 03:30:25,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:30:25,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-01-31 03:30:25,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:30:25,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-01-31 03:30:25,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 03:30:25,489 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:28,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:30:28,261 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2022-01-31 03:30:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 03:30:28,261 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-01-31 03:30:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:30:28,261 INFO L225 Difference]: With dead ends: 178 [2022-01-31 03:30:28,262 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 03:30:28,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33239 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 03:30:28,265 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 280 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:30:28,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 107 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:30:28,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 03:30:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2022-01-31 03:30:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 147 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:30:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2022-01-31 03:30:28,287 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 145 [2022-01-31 03:30:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:30:28,288 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2022-01-31 03:30:28,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2022-01-31 03:30:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 03:30:28,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:30:28,288 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:30:28,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-31 03:30:28,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-01-31 03:30:28,489 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:30:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:30:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1884174803, now seen corresponding path program 55 times [2022-01-31 03:30:28,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:30:28,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463590422] [2022-01-31 03:30:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:30:28,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:30:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:28,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:30:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:28,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:30:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:29,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 03:30:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:29,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:30:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463590422] [2022-01-31 03:30:29,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463590422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:30:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428649643] [2022-01-31 03:30:29,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:30:29,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:29,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:30:29,930 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:30:29,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-31 03:30:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:30,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-31 03:30:30,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:30:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:32,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:30:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:35,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428649643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:30:35,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:30:35,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-01-31 03:30:35,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518230368] [2022-01-31 03:30:35,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:30:35,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-01-31 03:30:35,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:30:35,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-01-31 03:30:35,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 03:30:35,503 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:38,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:30:38,229 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2022-01-31 03:30:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 03:30:38,229 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-01-31 03:30:38,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:30:38,230 INFO L225 Difference]: With dead ends: 173 [2022-01-31 03:30:38,230 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 03:30:38,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33269 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 03:30:38,235 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 257 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:30:38,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 95 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:30:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 03:30:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-01-31 03:30:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 150 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:30:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2022-01-31 03:30:38,272 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 145 [2022-01-31 03:30:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:30:38,272 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2022-01-31 03:30:38,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2022-01-31 03:30:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 03:30:38,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:30:38,273 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:30:38,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-31 03:30:38,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-31 03:30:38,473 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:30:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:30:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash 783533013, now seen corresponding path program 56 times [2022-01-31 03:30:38,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:30:38,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469593326] [2022-01-31 03:30:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:30:38,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:30:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:38,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:30:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:38,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:30:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:39,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 03:30:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:39,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:30:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469593326] [2022-01-31 03:30:39,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469593326] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:30:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291584930] [2022-01-31 03:30:39,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:30:39,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:39,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:30:39,590 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:30:39,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-31 03:30:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:30:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:30:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-01-31 03:30:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:30:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:42,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:30:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:45,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291584930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:30:45,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:30:45,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-01-31 03:30:45,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678002420] [2022-01-31 03:30:45,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:30:45,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 03:30:45,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:30:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 03:30:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 03:30:45,234 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:47,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:30:47,906 INFO L93 Difference]: Finished difference Result 175 states and 180 transitions. [2022-01-31 03:30:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 03:30:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-01-31 03:30:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:30:47,907 INFO L225 Difference]: With dead ends: 175 [2022-01-31 03:30:47,907 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 03:30:47,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32938 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-01-31 03:30:47,911 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 178 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:30:47,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 122 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:30:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 03:30:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2022-01-31 03:30:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 147 states have (on average 1.034013605442177) internal successors, (152), 149 states have internal predecessors, (152), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:30:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2022-01-31 03:30:47,934 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 147 [2022-01-31 03:30:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:30:47,934 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2022-01-31 03:30:47,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2022-01-31 03:30:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 03:30:47,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:30:47,935 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:30:47,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-31 03:30:48,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:48,135 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:30:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:30:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1591765941, now seen corresponding path program 56 times [2022-01-31 03:30:48,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:30:48,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714159524] [2022-01-31 03:30:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:30:48,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:30:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:48,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:30:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:48,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:30:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:48,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 03:30:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:49,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:30:49,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714159524] [2022-01-31 03:30:49,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714159524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:30:49,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394162411] [2022-01-31 03:30:49,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:30:49,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:30:49,560 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:30:49,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-31 03:30:50,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:30:50,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:30:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-01-31 03:30:50,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:30:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:51,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:30:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:54,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394162411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:30:54,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:30:54,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-01-31 03:30:54,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281743098] [2022-01-31 03:30:54,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:30:54,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 03:30:54,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:30:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 03:30:54,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 03:30:54,953 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:30:57,532 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2022-01-31 03:30:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 03:30:57,533 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-01-31 03:30:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:30:57,533 INFO L225 Difference]: With dead ends: 169 [2022-01-31 03:30:57,533 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 03:30:57,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32759 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-01-31 03:30:57,537 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 266 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:30:57,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 95 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:30:57,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 03:30:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-01-31 03:30:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 148 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:30:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-01-31 03:30:57,561 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 147 [2022-01-31 03:30:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:30:57,561 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-01-31 03:30:57,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:30:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-01-31 03:30:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 03:30:57,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:30:57,562 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:30:57,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-31 03:30:57,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:57,762 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:30:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:30:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1069515337, now seen corresponding path program 57 times [2022-01-31 03:30:57,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:30:57,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089564652] [2022-01-31 03:30:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:30:57,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:30:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:57,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:30:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:57,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:30:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:58,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 03:30:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:30:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:30:58,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:30:58,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089564652] [2022-01-31 03:30:58,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089564652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:30:58,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941587645] [2022-01-31 03:30:58,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:30:58,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:30:58,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:30:58,997 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:30:58,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-31 03:30:59,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-01-31 03:30:59,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:30:59,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-31 03:30:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:31:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:01,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:31:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:05,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941587645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:31:05,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:31:05,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-01-31 03:31:05,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451546351] [2022-01-31 03:31:05,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:31:05,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-01-31 03:31:05,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:31:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-01-31 03:31:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 03:31:05,143 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:31:08,036 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2022-01-31 03:31:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 03:31:08,037 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-01-31 03:31:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:31:08,037 INFO L225 Difference]: With dead ends: 182 [2022-01-31 03:31:08,037 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 03:31:08,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35384 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 03:31:08,041 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 252 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:31:08,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 87 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:31:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 03:31:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2022-01-31 03:31:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 151 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:31:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-01-31 03:31:08,064 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 149 [2022-01-31 03:31:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:31:08,065 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-01-31 03:31:08,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:08,065 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-01-31 03:31:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 03:31:08,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:31:08,065 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:31:08,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-31 03:31:08,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:31:08,266 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:31:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:31:08,266 INFO L85 PathProgramCache]: Analyzing trace with hash -910540045, now seen corresponding path program 57 times [2022-01-31 03:31:08,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:31:08,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907445140] [2022-01-31 03:31:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:31:08,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:31:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:08,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:31:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:08,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:31:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:08,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 03:31:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:09,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:31:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907445140] [2022-01-31 03:31:09,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907445140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:31:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002138744] [2022-01-31 03:31:09,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:31:09,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:31:09,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:31:09,750 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:31:09,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-31 03:31:10,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-01-31 03:31:10,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:31:10,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-31 03:31:10,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:31:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:12,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:31:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:15,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002138744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:31:15,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:31:15,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-01-31 03:31:15,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058622918] [2022-01-31 03:31:15,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:31:15,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-01-31 03:31:15,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:31:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-01-31 03:31:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 03:31:15,491 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:31:18,375 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2022-01-31 03:31:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 03:31:18,376 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-01-31 03:31:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:31:18,376 INFO L225 Difference]: With dead ends: 177 [2022-01-31 03:31:18,376 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 03:31:18,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35415 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 03:31:18,381 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 265 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:31:18,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 80 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:31:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 03:31:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-01-31 03:31:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.0394736842105263) internal successors, (158), 154 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:31:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 169 transitions. [2022-01-31 03:31:18,426 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 169 transitions. Word has length 149 [2022-01-31 03:31:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:31:18,426 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 169 transitions. [2022-01-31 03:31:18,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 169 transitions. [2022-01-31 03:31:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 03:31:18,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:31:18,427 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:31:18,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-31 03:31:18,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:31:18,627 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:31:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:31:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash -582875915, now seen corresponding path program 58 times [2022-01-31 03:31:18,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:31:18,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837492125] [2022-01-31 03:31:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:31:18,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:31:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:18,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:31:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:18,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:31:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:19,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 03:31:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:19,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:31:19,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837492125] [2022-01-31 03:31:19,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837492125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:31:19,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468154133] [2022-01-31 03:31:19,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:31:19,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:31:19,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:31:19,791 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:31:19,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-31 03:31:20,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:31:20,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:31:20,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-01-31 03:31:20,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:31:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:22,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:31:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:25,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468154133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:31:25,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:31:25,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-01-31 03:31:25,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167677653] [2022-01-31 03:31:25,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:31:25,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-01-31 03:31:25,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:31:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-01-31 03:31:25,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 03:31:25,713 INFO L87 Difference]: Start difference. First operand 164 states and 169 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:31:28,345 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2022-01-31 03:31:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 03:31:28,345 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-01-31 03:31:28,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:31:28,346 INFO L225 Difference]: With dead ends: 179 [2022-01-31 03:31:28,346 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 03:31:28,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35073 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-01-31 03:31:28,351 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 198 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:31:28,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 82 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:31:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 03:31:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2022-01-31 03:31:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.033112582781457) internal successors, (156), 153 states have internal predecessors, (156), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:31:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2022-01-31 03:31:28,378 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 151 [2022-01-31 03:31:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:31:28,379 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2022-01-31 03:31:28,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2022-01-31 03:31:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 03:31:28,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:31:28,379 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:31:28,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-31 03:31:28,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:31:28,580 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:31:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:31:28,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1281118891, now seen corresponding path program 58 times [2022-01-31 03:31:28,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:31:28,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254216311] [2022-01-31 03:31:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:31:28,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:31:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:28,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:31:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:28,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:31:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:29,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 03:31:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:30,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:31:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254216311] [2022-01-31 03:31:30,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254216311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:31:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732295893] [2022-01-31 03:31:30,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:31:30,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:31:30,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:31:30,169 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:31:30,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-31 03:31:30,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:31:30,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:31:30,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-01-31 03:31:30,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:31:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:32,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:31:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:35,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732295893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:31:35,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:31:35,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-01-31 03:31:35,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305228946] [2022-01-31 03:31:35,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:31:35,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-01-31 03:31:35,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:31:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-01-31 03:31:35,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 03:31:35,825 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:31:38,523 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-01-31 03:31:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 03:31:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-01-31 03:31:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:31:38,524 INFO L225 Difference]: With dead ends: 173 [2022-01-31 03:31:38,524 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 03:31:38,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34888 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-01-31 03:31:38,527 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 232 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:31:38,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 110 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:31:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 03:31:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-01-31 03:31:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 152 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:31:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2022-01-31 03:31:38,564 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 151 [2022-01-31 03:31:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:31:38,564 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2022-01-31 03:31:38,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2022-01-31 03:31:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 03:31:38,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:31:38,565 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:31:38,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-31 03:31:38,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-31 03:31:38,766 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:31:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:31:38,766 INFO L85 PathProgramCache]: Analyzing trace with hash -247867561, now seen corresponding path program 59 times [2022-01-31 03:31:38,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:31:38,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038978753] [2022-01-31 03:31:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:31:38,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:31:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:38,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:31:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:38,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:31:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:39,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 03:31:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:40,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:31:40,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038978753] [2022-01-31 03:31:40,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038978753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:31:40,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053707640] [2022-01-31 03:31:40,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:31:40,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:31:40,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:31:40,024 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:31:40,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-31 03:31:40,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-01-31 03:31:40,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:31:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-01-31 03:31:40,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:31:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:42,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:31:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:46,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053707640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:31:46,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:31:46,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-01-31 03:31:46,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863237841] [2022-01-31 03:31:46,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:31:46,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-01-31 03:31:46,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:31:46,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-01-31 03:31:46,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 03:31:46,419 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:31:49,564 INFO L93 Difference]: Finished difference Result 186 states and 193 transitions. [2022-01-31 03:31:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 03:31:49,576 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-01-31 03:31:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:31:49,576 INFO L225 Difference]: With dead ends: 186 [2022-01-31 03:31:49,576 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 03:31:49,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37596 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 03:31:49,581 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:31:49,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 97 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:31:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 03:31:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-01-31 03:31:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 155 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:31:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2022-01-31 03:31:49,620 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 153 [2022-01-31 03:31:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:31:49,620 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2022-01-31 03:31:49,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:31:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2022-01-31 03:31:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 03:31:49,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:31:49,621 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:31:49,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-31 03:31:49,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-31 03:31:49,831 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:31:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:31:49,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2070428397, now seen corresponding path program 59 times [2022-01-31 03:31:49,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:31:49,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338870188] [2022-01-31 03:31:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:31:49,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:31:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:49,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:31:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:49,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:31:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:50,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 03:31:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:31:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:51,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:31:51,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338870188] [2022-01-31 03:31:51,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338870188] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:31:51,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089012284] [2022-01-31 03:31:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:31:51,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:31:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:31:51,415 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:31:51,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-31 03:31:51,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-01-31 03:31:51,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:31:51,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-01-31 03:31:51,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:31:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:54,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:31:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:31:57,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089012284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:31:57,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:31:57,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-01-31 03:31:57,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521267703] [2022-01-31 03:31:57,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:31:57,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-01-31 03:31:57,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:31:57,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-01-31 03:31:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 03:31:57,546 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:32:00,679 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2022-01-31 03:32:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 03:32:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-01-31 03:32:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:32:00,680 INFO L225 Difference]: With dead ends: 181 [2022-01-31 03:32:00,680 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 03:32:00,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37628 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 03:32:00,684 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 321 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:32:00,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 120 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:32:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 03:32:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2022-01-31 03:32:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.0384615384615385) internal successors, (162), 158 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:32:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2022-01-31 03:32:00,710 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 153 [2022-01-31 03:32:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:32:00,710 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2022-01-31 03:32:00,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2022-01-31 03:32:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 03:32:00,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:32:00,711 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:32:00,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-31 03:32:00,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-31 03:32:00,913 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:32:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:32:00,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1455914773, now seen corresponding path program 60 times [2022-01-31 03:32:00,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:32:00,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40725546] [2022-01-31 03:32:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:32:00,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:32:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:00,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:32:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:00,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:32:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 03:32:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:02,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:32:02,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40725546] [2022-01-31 03:32:02,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40725546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:32:02,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212659791] [2022-01-31 03:32:02,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:32:02,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:32:02,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:32:02,145 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:32:02,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-31 03:32:02,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-01-31 03:32:02,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:32:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-31 03:32:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:32:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:04,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:32:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:08,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212659791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:32:08,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:32:08,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-01-31 03:32:08,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103617505] [2022-01-31 03:32:08,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:32:08,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-01-31 03:32:08,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:32:08,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-01-31 03:32:08,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-01-31 03:32:08,448 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:32:11,349 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-01-31 03:32:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 03:32:11,350 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-01-31 03:32:11,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:32:11,350 INFO L225 Difference]: With dead ends: 183 [2022-01-31 03:32:11,350 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 03:32:11,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37275 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-01-31 03:32:11,355 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:32:11,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 97 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:32:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 03:32:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-01-31 03:32:11,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 155 states have (on average 1.032258064516129) internal successors, (160), 157 states have internal predecessors, (160), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:32:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 171 transitions. [2022-01-31 03:32:11,402 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 171 transitions. Word has length 155 [2022-01-31 03:32:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:32:11,403 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 171 transitions. [2022-01-31 03:32:11,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 171 transitions. [2022-01-31 03:32:11,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 03:32:11,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:32:11,403 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:32:11,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-31 03:32:11,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-31 03:32:11,604 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:32:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:32:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash 438306805, now seen corresponding path program 60 times [2022-01-31 03:32:11,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:32:11,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424785330] [2022-01-31 03:32:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:32:11,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:32:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:11,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:32:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:11,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:32:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:12,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 03:32:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:13,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:32:13,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424785330] [2022-01-31 03:32:13,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424785330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:32:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870288771] [2022-01-31 03:32:13,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:32:13,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:32:13,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:32:13,186 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:32:13,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-31 03:32:13,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-01-31 03:32:13,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:32:13,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-31 03:32:13,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:32:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:15,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:32:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:19,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870288771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:32:19,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:32:19,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-01-31 03:32:19,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765961462] [2022-01-31 03:32:19,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:32:19,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-01-31 03:32:19,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:32:19,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-01-31 03:32:19,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-01-31 03:32:19,201 INFO L87 Difference]: Start difference. First operand 167 states and 171 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:32:22,158 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2022-01-31 03:32:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 03:32:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-01-31 03:32:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:32:22,159 INFO L225 Difference]: With dead ends: 177 [2022-01-31 03:32:22,159 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 03:32:22,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37084 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-01-31 03:32:22,163 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 226 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:32:22,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 115 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:32:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 03:32:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-01-31 03:32:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.025974025974026) internal successors, (158), 156 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:32:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-01-31 03:32:22,190 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 155 [2022-01-31 03:32:22,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:32:22,190 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-01-31 03:32:22,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-01-31 03:32:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 03:32:22,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:32:22,191 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:32:22,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-31 03:32:22,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:32:22,392 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:32:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:32:22,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1442182665, now seen corresponding path program 61 times [2022-01-31 03:32:22,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:32:22,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823777404] [2022-01-31 03:32:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:32:22,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:32:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:22,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:32:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:22,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:32:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:23,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 03:32:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:23,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:32:23,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823777404] [2022-01-31 03:32:23,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823777404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:32:23,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592880635] [2022-01-31 03:32:23,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:32:23,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:32:23,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:32:23,695 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:32:23,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-31 03:32:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:24,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 03:32:24,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:32:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:26,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:32:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:30,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592880635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:32:30,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:32:30,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-01-31 03:32:30,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794297661] [2022-01-31 03:32:30,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:32:30,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-01-31 03:32:30,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:32:30,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-01-31 03:32:30,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 03:32:30,422 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:32:33,497 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-01-31 03:32:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 03:32:33,498 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-01-31 03:32:33,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:32:33,498 INFO L225 Difference]: With dead ends: 190 [2022-01-31 03:32:33,498 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 03:32:33,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39875 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 03:32:33,504 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 346 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:32:33,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 77 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:32:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 03:32:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2022-01-31 03:32:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 159 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:32:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2022-01-31 03:32:33,535 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 157 [2022-01-31 03:32:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:32:33,535 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2022-01-31 03:32:33,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2022-01-31 03:32:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 03:32:33,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:32:33,536 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:32:33,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-31 03:32:33,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:32:33,739 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:32:33,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:32:33,740 INFO L85 PathProgramCache]: Analyzing trace with hash -555483085, now seen corresponding path program 61 times [2022-01-31 03:32:33,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:32:33,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686684178] [2022-01-31 03:32:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:32:33,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:32:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:33,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:32:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:33,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:32:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:34,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 03:32:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:35,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:32:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686684178] [2022-01-31 03:32:35,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686684178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:32:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628634665] [2022-01-31 03:32:35,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:32:35,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:32:35,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:32:35,420 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:32:35,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-31 03:32:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 03:32:35,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:32:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:38,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:32:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:41,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628634665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:32:41,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:32:41,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-01-31 03:32:41,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716498005] [2022-01-31 03:32:41,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:32:41,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-01-31 03:32:41,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:32:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-01-31 03:32:41,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 03:32:41,846 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:32:45,093 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2022-01-31 03:32:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 03:32:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-01-31 03:32:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:32:45,094 INFO L225 Difference]: With dead ends: 185 [2022-01-31 03:32:45,094 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 03:32:45,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39908 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 03:32:45,100 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 212 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:32:45,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 95 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:32:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 03:32:45,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2022-01-31 03:32:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.0375) internal successors, (166), 162 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 03:32:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 177 transitions. [2022-01-31 03:32:45,162 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 177 transitions. Word has length 157 [2022-01-31 03:32:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:32:45,163 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 177 transitions. [2022-01-31 03:32:45,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:32:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 177 transitions. [2022-01-31 03:32:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 03:32:45,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:32:45,164 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:32:45,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-31 03:32:45,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-01-31 03:32:45,371 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:32:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:32:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1324446261, now seen corresponding path program 62 times [2022-01-31 03:32:45,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:32:45,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032488314] [2022-01-31 03:32:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:32:45,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:32:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:45,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:32:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:45,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:32:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:45,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 03:32:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:32:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:46,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:32:46,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032488314] [2022-01-31 03:32:46,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032488314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:32:46,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376885144] [2022-01-31 03:32:46,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:32:46,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:32:46,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:32:46,652 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:32:46,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-31 03:32:47,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:32:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:32:47,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-31 03:32:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:32:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:49,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:32:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:32:53,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376885144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:32:53,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:32:53,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 73, 73] total 212 [2022-01-31 03:32:53,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205999272] [2022-01-31 03:32:53,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:32:53,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-01-31 03:32:53,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:32:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-01-31 03:32:53,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7433, Invalid=37299, Unknown=0, NotChecked=0, Total=44732 [2022-01-31 03:32:53,410 INFO L87 Difference]: Start difference. First operand 172 states and 177 transitions. Second operand has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3)