/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:29:53,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:29:53,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:29:53,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 19:29:53,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 19:29:53,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 19:29:53,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 19:29:53,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 19:29:53,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 19:29:53,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 19:29:53,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 19:29:53,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 19:29:53,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 19:29:53,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 19:29:53,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 19:29:53,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 19:29:53,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 19:29:53,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 19:29:53,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 19:29:53,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 19:29:53,967 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 19:29:53,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 19:29:53,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 19:29:53,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 19:29:53,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 19:29:53,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 19:29:53,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 19:29:53,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 19:29:53,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 19:29:53,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 19:29:53,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 19:29:53,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 19:29:53,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 19:29:53,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 19:29:53,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 19:29:53,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 19:29:53,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 19:29:53,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 19:29:53,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 19:29:53,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:29:53,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:29:53,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:29:53,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:29:53,992 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:29:53,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:29:53,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:29:53,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:29:53,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:29:53,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:29:53,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:29:53,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:29:53,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:29:53,994 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:29:53,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:29:53,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:29:53,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:29:53,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:29:53,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:29:53,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:29:53,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:29:53,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:29:53,994 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:29:53,995 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:29:53,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:29:53,995 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:29:53,995 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:29:54,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:29:54,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:29:54,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:29:54,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:29:54,200 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:29:54,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2022-04-06 19:29:54,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b680d6632/0a806255f71e4266b6f3a03432272e67/FLAG26065861a [2022-04-06 19:29:54,588 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:29:54,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c [2022-04-06 19:29:54,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b680d6632/0a806255f71e4266b6f3a03432272e67/FLAG26065861a [2022-04-06 19:29:54,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b680d6632/0a806255f71e4266b6f3a03432272e67 [2022-04-06 19:29:54,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:29:54,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:29:54,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:29:54,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:29:54,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:29:54,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e28e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54, skipping insertion in model container [2022-04-06 19:29:54,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:29:54,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:29:54,785 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/heavy-1.c[600,613] [2022-04-06 19:29:54,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:29:54,822 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:29:54,840 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/heavy-1.c[600,613] [2022-04-06 19:29:54,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:29:54,894 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:29:54,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54 WrapperNode [2022-04-06 19:29:54,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:29:54,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:29:54,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:29:54,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:29:54,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:29:54,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:29:54,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:29:54,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:29:54,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54" (1/1) ... [2022-04-06 19:29:54,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:29:54,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:54,937 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) [2022-04-06 19:29:54,939 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 [2022-04-06 19:29:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:29:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:29:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:29:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:29:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:29:55,018 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:29:55,019 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:29:55,124 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:29:55,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:29:55,128 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 19:29:55,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:29:55 BoogieIcfgContainer [2022-04-06 19:29:55,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:29:55,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:29:55,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:29:55,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:29:55,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:29:54" (1/3) ... [2022-04-06 19:29:55,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2149b1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:29:55, skipping insertion in model container [2022-04-06 19:29:55,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:54" (2/3) ... [2022-04-06 19:29:55,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2149b1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:29:55, skipping insertion in model container [2022-04-06 19:29:55,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:29:55" (3/3) ... [2022-04-06 19:29:55,135 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2022-04-06 19:29:55,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:29:55,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:29:55,201 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:29:55,206 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-04-06 19:29:55,206 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:29:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-04-06 19:29:55,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:55,226 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:55,227 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:55,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2022-04-06 19:29:55,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:55,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1303842318] [2022-04-06 19:29:55,246 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:29:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 2 times [2022-04-06 19:29:55,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:55,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258871390] [2022-04-06 19:29:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:55,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:55,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258871390] [2022-04-06 19:29:55,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258871390] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:29:55,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:55,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1303842318] [2022-04-06 19:29:55,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1303842318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:29:55,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320290887] [2022-04-06 19:29:55,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:55,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:29:55,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:55,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:29:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:29:55,487 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:55,555 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2022-04-06 19:29:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:29:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-04-06 19:29:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:55,561 INFO L225 Difference]: With dead ends: 42 [2022-04-06 19:29:55,561 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 19:29:55,563 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:29:55,566 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:55,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 19:29:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2022-04-06 19:29:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-04-06 19:29:55,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-04-06 19:29:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:55,587 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-04-06 19:29:55,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:55,588 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-04-06 19:29:55,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-04-06 19:29:55,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:55,588 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:55,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:29:55,588 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2022-04-06 19:29:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:55,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381818063] [2022-04-06 19:29:55,590 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:29:55,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 2 times [2022-04-06 19:29:55,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:55,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212370376] [2022-04-06 19:29:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:55,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:55,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:55,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212370376] [2022-04-06 19:29:55,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212370376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:55,654 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:55,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381818063] [2022-04-06 19:29:55,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381818063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:55,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140629970] [2022-04-06 19:29:55,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:55,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:29:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:29:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:29:55,656 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:55,732 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-04-06 19:29:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:29:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-04-06 19:29:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:55,734 INFO L225 Difference]: With dead ends: 36 [2022-04-06 19:29:55,734 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 19:29:55,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:29:55,735 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:55,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:29:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 19:29:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2022-04-06 19:29:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-04-06 19:29:55,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-04-06 19:29:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:55,740 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-04-06 19:29:55,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-04-06 19:29:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 19:29:55,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:55,741 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:55,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:29:55,741 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2022-04-06 19:29:55,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:55,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1041799331] [2022-04-06 19:29:55,757 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:29:55,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:55,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 2 times [2022-04-06 19:29:55,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:55,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992839904] [2022-04-06 19:29:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:55,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:55,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:55,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992839904] [2022-04-06 19:29:55,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992839904] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:55,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:55,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1041799331] [2022-04-06 19:29:55,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1041799331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:55,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535991936] [2022-04-06 19:29:55,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:55,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:29:55,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:29:55,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:29:55,854 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:55,923 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-04-06 19:29:55,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:29:55,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 19:29:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:55,924 INFO L225 Difference]: With dead ends: 40 [2022-04-06 19:29:55,924 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 19:29:55,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:29:55,925 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:55,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 19:29:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2022-04-06 19:29:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 19:29:55,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-04-06 19:29:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:55,931 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 19:29:55,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 19:29:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 19:29:55,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:55,932 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:55,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 19:29:55,932 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2022-04-06 19:29:55,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658185760] [2022-04-06 19:29:55,942 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:29:55,947 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:29:55,948 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 2 times [2022-04-06 19:29:55,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:55,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888720048] [2022-04-06 19:29:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:55,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:55,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:55,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888720048] [2022-04-06 19:29:55,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888720048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:55,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:55,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658185760] [2022-04-06 19:29:55,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658185760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:55,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827026359] [2022-04-06 19:29:55,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:55,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:29:55,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:55,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:29:55,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:29:55,988 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:56,018 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-04-06 19:29:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:29:56,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 19:29:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:56,019 INFO L225 Difference]: With dead ends: 31 [2022-04-06 19:29:56,019 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 19:29:56,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:29:56,020 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:56,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 19:29:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-04-06 19:29:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-04-06 19:29:56,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2022-04-06 19:29:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:56,024 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-04-06 19:29:56,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-06 19:29:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:29:56,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:56,024 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:56,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 19:29:56,025 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2022-04-06 19:29:56,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [779680321] [2022-04-06 19:29:56,114 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:56,115 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:56,123 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:56,123 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 2 times [2022-04-06 19:29:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:56,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187562260] [2022-04-06 19:29:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:56,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:56,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:56,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187562260] [2022-04-06 19:29:56,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187562260] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:56,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334706559] [2022-04-06 19:29:56,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:29:56,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:56,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:56,228 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) [2022-04-06 19:29:56,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:29:56,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:29:56,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:56,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:29:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:29:56,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:29:56,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334706559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:56,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:56,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-04-06 19:29:56,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [779680321] [2022-04-06 19:29:56,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [779680321] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:56,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:56,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:29:56,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390162288] [2022-04-06 19:29:56,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:56,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:29:56,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:29:56,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:29:56,382 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:56,420 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-04-06 19:29:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:29:56,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 19:29:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:56,421 INFO L225 Difference]: With dead ends: 34 [2022-04-06 19:29:56,421 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 19:29:56,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:29:56,422 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:56,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 19:29:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-04-06 19:29:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-04-06 19:29:56,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-04-06 19:29:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:56,426 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-04-06 19:29:56,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-06 19:29:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 19:29:56,427 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:56,427 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:56,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 19:29:56,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:56,647 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 3 times [2022-04-06 19:29:56,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185810378] [2022-04-06 19:29:56,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:56,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:56,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:56,784 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 4 times [2022-04-06 19:29:56,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:56,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959785602] [2022-04-06 19:29:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:56,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:56,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959785602] [2022-04-06 19:29:56,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959785602] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821177868] [2022-04-06 19:29:56,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:29:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:56,878 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) [2022-04-06 19:29:56,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:29:56,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:29:56,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:29:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:57,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:57,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821177868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:57,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:57,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-04-06 19:29:57,098 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [185810378] [2022-04-06 19:29:57,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [185810378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:57,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:57,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:29:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374117922] [2022-04-06 19:29:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:57,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:29:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:29:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:29:57,100 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:57,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:57,153 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-04-06 19:29:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:29:57,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 19:29:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:57,156 INFO L225 Difference]: With dead ends: 38 [2022-04-06 19:29:57,156 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 19:29:57,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:29:57,158 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:57,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 46 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 19:29:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-04-06 19:29:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-04-06 19:29:57,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-04-06 19:29:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:57,167 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-04-06 19:29:57,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-04-06 19:29:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:29:57,167 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:57,167 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:57,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 19:29:57,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 19:29:57,376 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash -617772747, now seen corresponding path program 5 times [2022-04-06 19:29:57,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:57,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1529548850] [2022-04-06 19:29:57,479 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:57,479 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:57,482 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:57,482 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:57,483 INFO L85 PathProgramCache]: Analyzing trace with hash -617772747, now seen corresponding path program 6 times [2022-04-06 19:29:57,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:57,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789942288] [2022-04-06 19:29:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:57,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:57,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789942288] [2022-04-06 19:29:57,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789942288] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:57,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879052749] [2022-04-06 19:29:57,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:29:57,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:57,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:57,581 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) [2022-04-06 19:29:57,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:29:57,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:29:57,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:29:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:29:57,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:29:57,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879052749] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:57,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:57,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-04-06 19:29:57,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:57,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1529548850] [2022-04-06 19:29:57,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1529548850] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:57,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:57,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:29:57,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563399267] [2022-04-06 19:29:57,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:57,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:29:57,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:29:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:29:57,730 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:57,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:57,788 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-04-06 19:29:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:29:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 19:29:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:57,790 INFO L225 Difference]: With dead ends: 42 [2022-04-06 19:29:57,790 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 19:29:57,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:29:57,792 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:57,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 19:29:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-04-06 19:29:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-04-06 19:29:57,802 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2022-04-06 19:29:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:57,802 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-04-06 19:29:57,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-04-06 19:29:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 19:29:57,803 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:57,803 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:57,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:29:58,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:58,016 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:58,016 INFO L85 PathProgramCache]: Analyzing trace with hash -272617773, now seen corresponding path program 7 times [2022-04-06 19:29:58,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:58,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024096374] [2022-04-06 19:29:58,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:58,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:58,124 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:58,124 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash -272617773, now seen corresponding path program 8 times [2022-04-06 19:29:58,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:58,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317654464] [2022-04-06 19:29:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:58,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:58,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317654464] [2022-04-06 19:29:58,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317654464] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:58,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020514546] [2022-04-06 19:29:58,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:29:58,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:58,224 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) [2022-04-06 19:29:58,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:29:58,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:29:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:29:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 19:29:58,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 19:29:58,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020514546] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:58,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:58,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2022-04-06 19:29:58,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024096374] [2022-04-06 19:29:58,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024096374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:58,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:58,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:29:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247677512] [2022-04-06 19:29:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:58,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:29:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:58,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:29:58,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:29:58,429 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:58,498 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-04-06 19:29:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:29:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 19:29:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:58,500 INFO L225 Difference]: With dead ends: 46 [2022-04-06 19:29:58,500 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 19:29:58,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:29:58,501 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:58,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 26 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 19:29:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-04-06 19:29:58,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-04-06 19:29:58,509 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2022-04-06 19:29:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:58,509 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-04-06 19:29:58,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-04-06 19:29:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 19:29:58,510 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:58,510 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:58,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 19:29:58,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:58,727 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:58,727 INFO L85 PathProgramCache]: Analyzing trace with hash 708830449, now seen corresponding path program 9 times [2022-04-06 19:29:58,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:58,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1659171857] [2022-04-06 19:29:58,821 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:58,821 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:58,827 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:58,827 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:58,827 INFO L85 PathProgramCache]: Analyzing trace with hash 708830449, now seen corresponding path program 10 times [2022-04-06 19:29:58,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:58,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403194133] [2022-04-06 19:29:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:58,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:58,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:58,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403194133] [2022-04-06 19:29:58,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403194133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:58,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006833056] [2022-04-06 19:29:58,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:29:58,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:58,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:58,939 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) [2022-04-06 19:29:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:29:58,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:29:58,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:29:58,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 19:29:59,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 19:29:59,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006833056] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:59,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:59,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2022-04-06 19:29:59,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:59,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1659171857] [2022-04-06 19:29:59,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1659171857] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:59,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:59,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:29:59,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341949157] [2022-04-06 19:29:59,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:59,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:29:59,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:29:59,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:29:59,141 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:59,214 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-04-06 19:29:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:29:59,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 19:29:59,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:59,216 INFO L225 Difference]: With dead ends: 50 [2022-04-06 19:29:59,216 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 19:29:59,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:29:59,217 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:59,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 66 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:29:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 19:29:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-04-06 19:29:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-04-06 19:29:59,222 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2022-04-06 19:29:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:59,223 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-04-06 19:29:59,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-06 19:29:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 19:29:59,223 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:59,224 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:59,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 19:29:59,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:59,456 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1012233329, now seen corresponding path program 11 times [2022-04-06 19:29:59,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645902481] [2022-04-06 19:29:59,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:59,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:59,554 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:59,555 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1012233329, now seen corresponding path program 12 times [2022-04-06 19:29:59,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:59,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673798728] [2022-04-06 19:29:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:59,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:59,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:59,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673798728] [2022-04-06 19:29:59,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673798728] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:59,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034720605] [2022-04-06 19:29:59,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:29:59,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:59,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:59,655 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) [2022-04-06 19:29:59,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:29:59,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:29:59,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:59,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:29:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 19:29:59,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 19:29:59,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034720605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:59,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:59,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 14 [2022-04-06 19:29:59,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645902481] [2022-04-06 19:29:59,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645902481] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:59,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:59,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:29:59,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060850847] [2022-04-06 19:29:59,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:59,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:29:59,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:29:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:29:59,799 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:59,878 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-04-06 19:29:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:29:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 19:29:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:59,880 INFO L225 Difference]: With dead ends: 54 [2022-04-06 19:29:59,880 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 19:29:59,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:29:59,881 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:59,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:29:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 19:29:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-04-06 19:29:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-06 19:29:59,888 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2022-04-06 19:29:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:59,889 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-06 19:29:59,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-06 19:29:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:29:59,891 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:59,891 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:59,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:00,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:00,096 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:00,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1392115027, now seen corresponding path program 13 times [2022-04-06 19:30:00,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:00,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [856595702] [2022-04-06 19:30:00,182 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:00,182 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:00,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:00,190 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:00,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1392115027, now seen corresponding path program 14 times [2022-04-06 19:30:00,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:00,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777722868] [2022-04-06 19:30:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:00,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:00,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:00,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777722868] [2022-04-06 19:30:00,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777722868] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167015622] [2022-04-06 19:30:00,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:00,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:00,285 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) [2022-04-06 19:30:00,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:30:00,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:00,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:00,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:00,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 19:30:00,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 19:30:00,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167015622] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:00,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:00,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 19 [2022-04-06 19:30:00,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [856595702] [2022-04-06 19:30:00,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [856595702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:00,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:00,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:30:00,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510428258] [2022-04-06 19:30:00,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:00,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:30:00,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:00,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:30:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:30:00,533 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:00,626 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-04-06 19:30:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:30:00,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 19:30:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:00,626 INFO L225 Difference]: With dead ends: 58 [2022-04-06 19:30:00,626 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 19:30:00,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:30:00,627 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:00,627 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 19:30:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-04-06 19:30:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-04-06 19:30:00,630 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2022-04-06 19:30:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:00,630 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-04-06 19:30:00,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-04-06 19:30:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 19:30:00,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:00,631 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:00,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:00,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:00,838 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:00,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1386206645, now seen corresponding path program 15 times [2022-04-06 19:30:00,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:00,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806656198] [2022-04-06 19:30:00,926 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:00,926 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:00,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:00,932 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1386206645, now seen corresponding path program 16 times [2022-04-06 19:30:00,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:00,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747034931] [2022-04-06 19:30:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:01,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:01,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:01,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747034931] [2022-04-06 19:30:01,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747034931] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:01,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395264158] [2022-04-06 19:30:01,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:01,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:01,046 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) [2022-04-06 19:30:01,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 19:30:01,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:01,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:01,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:01,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 19:30:01,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 19:30:01,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395264158] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:01,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:01,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 20 [2022-04-06 19:30:01,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:01,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806656198] [2022-04-06 19:30:01,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806656198] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:01,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:01,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:30:01,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417839228] [2022-04-06 19:30:01,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:01,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:30:01,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:30:01,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:30:01,293 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:01,403 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-04-06 19:30:01,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:30:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 19:30:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:01,404 INFO L225 Difference]: With dead ends: 62 [2022-04-06 19:30:01,404 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 19:30:01,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:30:01,405 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:01,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 19:30:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-04-06 19:30:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-04-06 19:30:01,408 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2022-04-06 19:30:01,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:01,408 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-04-06 19:30:01,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-04-06 19:30:01,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:30:01,409 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:01,409 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:01,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:01,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 19:30:01,624 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:01,624 INFO L85 PathProgramCache]: Analyzing trace with hash -3218839, now seen corresponding path program 17 times [2022-04-06 19:30:01,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:01,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25253875] [2022-04-06 19:30:01,716 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:01,716 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:01,723 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:01,723 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash -3218839, now seen corresponding path program 18 times [2022-04-06 19:30:01,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:01,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319461806] [2022-04-06 19:30:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:01,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:01,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:01,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:01,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319461806] [2022-04-06 19:30:01,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319461806] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:01,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129999407] [2022-04-06 19:30:01,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:01,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:01,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:01,851 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) [2022-04-06 19:30:01,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 19:30:01,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:01,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:30:01,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 19:30:02,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 19:30:02,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129999407] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:02,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:02,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 17 [2022-04-06 19:30:02,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:02,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25253875] [2022-04-06 19:30:02,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25253875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:02,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:02,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:30:02,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637195816] [2022-04-06 19:30:02,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:02,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:30:02,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:02,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:30:02,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:30:02,138 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:02,276 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2022-04-06 19:30:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:30:02,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 19:30:02,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:02,277 INFO L225 Difference]: With dead ends: 66 [2022-04-06 19:30:02,277 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 19:30:02,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:30:02,278 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:02,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 19:30:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-04-06 19:30:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-04-06 19:30:02,281 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2022-04-06 19:30:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:02,281 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-04-06 19:30:02,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-04-06 19:30:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 19:30:02,282 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:02,282 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:02,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:02,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 19:30:02,484 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1903168263, now seen corresponding path program 19 times [2022-04-06 19:30:02,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:02,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020671391] [2022-04-06 19:30:02,577 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:02,577 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:02,586 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:02,586 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:02,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1903168263, now seen corresponding path program 20 times [2022-04-06 19:30:02,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:02,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002524775] [2022-04-06 19:30:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:02,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:02,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:02,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:02,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002524775] [2022-04-06 19:30:02,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002524775] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:02,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037830758] [2022-04-06 19:30:02,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:02,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:02,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:02,748 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) [2022-04-06 19:30:02,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 19:30:02,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:02,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:02,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:02,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-04-06 19:30:02,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-04-06 19:30:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037830758] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:03,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:03,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 22 [2022-04-06 19:30:03,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020671391] [2022-04-06 19:30:03,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020671391] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:03,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:03,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:30:03,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053693231] [2022-04-06 19:30:03,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:03,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:30:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:30:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:30:03,034 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:03,179 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2022-04-06 19:30:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:30:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 19:30:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:03,179 INFO L225 Difference]: With dead ends: 70 [2022-04-06 19:30:03,179 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 19:30:03,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:30:03,180 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:03,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 66 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 19:30:03,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-04-06 19:30:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-04-06 19:30:03,184 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2022-04-06 19:30:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:03,184 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-04-06 19:30:03,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-04-06 19:30:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:30:03,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:03,184 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:03,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:03,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 19:30:03,400 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash -9862107, now seen corresponding path program 21 times [2022-04-06 19:30:03,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:03,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1738106780] [2022-04-06 19:30:03,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:03,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:03,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:03,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash -9862107, now seen corresponding path program 22 times [2022-04-06 19:30:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:03,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249205004] [2022-04-06 19:30:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:03,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:03,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:03,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249205004] [2022-04-06 19:30:03,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249205004] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:03,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96494793] [2022-04-06 19:30:03,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:03,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:03,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:03,682 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) [2022-04-06 19:30:03,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 19:30:03,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 19:30:03,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 19:30:03,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96494793] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:03,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:03,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 23 [2022-04-06 19:30:03,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:03,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1738106780] [2022-04-06 19:30:03,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1738106780] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:03,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:03,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:30:03,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898503536] [2022-04-06 19:30:03,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:03,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:30:03,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:30:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:30:03,991 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:04,163 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-04-06 19:30:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:30:04,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 19:30:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:04,165 INFO L225 Difference]: With dead ends: 74 [2022-04-06 19:30:04,165 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 19:30:04,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:30:04,166 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:04,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 46 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 19:30:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-04-06 19:30:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-04-06 19:30:04,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-04-06 19:30:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:04,171 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-04-06 19:30:04,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-04-06 19:30:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 19:30:04,171 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:04,171 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:04,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:04,389 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 19:30:04,389 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash -186044989, now seen corresponding path program 23 times [2022-04-06 19:30:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:04,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474601065] [2022-04-06 19:30:04,513 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:04,513 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:04,523 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:04,523 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash -186044989, now seen corresponding path program 24 times [2022-04-06 19:30:04,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:04,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257172440] [2022-04-06 19:30:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:04,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:04,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:04,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:04,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257172440] [2022-04-06 19:30:04,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257172440] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:04,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299986947] [2022-04-06 19:30:04,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:04,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:04,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:04,711 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) [2022-04-06 19:30:04,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 19:30:04,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:04,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:04,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:30:04,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-04-06 19:30:04,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-04-06 19:30:04,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299986947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:04,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:04,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 4, 4] total 20 [2022-04-06 19:30:04,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474601065] [2022-04-06 19:30:04,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474601065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:04,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:04,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:30:04,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397814965] [2022-04-06 19:30:04,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:04,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:30:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:04,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:30:04,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:30:04,949 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:05,137 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-04-06 19:30:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:30:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 19:30:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:05,137 INFO L225 Difference]: With dead ends: 78 [2022-04-06 19:30:05,137 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 19:30:05,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:30:05,138 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:05,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 19:30:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-04-06 19:30:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-04-06 19:30:05,141 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2022-04-06 19:30:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:05,141 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-04-06 19:30:05,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-04-06 19:30:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 19:30:05,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:05,142 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:05,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:05,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 19:30:05,342 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:05,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:05,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1994070047, now seen corresponding path program 25 times [2022-04-06 19:30:05,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:05,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2106050138] [2022-04-06 19:30:05,475 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:05,475 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:05,487 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:05,487 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:05,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1994070047, now seen corresponding path program 26 times [2022-04-06 19:30:05,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:05,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787908686] [2022-04-06 19:30:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:05,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:05,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:05,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787908686] [2022-04-06 19:30:05,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787908686] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:05,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340290429] [2022-04-06 19:30:05,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:05,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:05,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:05,692 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) [2022-04-06 19:30:05,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 19:30:05,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:05,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:05,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:05,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-04-06 19:30:05,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-04-06 19:30:06,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340290429] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:06,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:06,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 25 [2022-04-06 19:30:06,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2106050138] [2022-04-06 19:30:06,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2106050138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:06,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:06,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:30:06,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095807911] [2022-04-06 19:30:06,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:06,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:30:06,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:06,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:30:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:30:06,033 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:06,246 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-04-06 19:30:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:30:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 19:30:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:06,247 INFO L225 Difference]: With dead ends: 82 [2022-04-06 19:30:06,247 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 19:30:06,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:30:06,247 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:06,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 19:30:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-04-06 19:30:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-04-06 19:30:06,251 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2022-04-06 19:30:06,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:06,251 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-04-06 19:30:06,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-04-06 19:30:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 19:30:06,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:06,251 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:06,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 19:30:06,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 19:30:06,467 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash -44395905, now seen corresponding path program 27 times [2022-04-06 19:30:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:06,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [388478794] [2022-04-06 19:30:06,599 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:06,600 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:06,609 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:06,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:06,609 INFO L85 PathProgramCache]: Analyzing trace with hash -44395905, now seen corresponding path program 28 times [2022-04-06 19:30:06,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:06,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700431867] [2022-04-06 19:30:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:06,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:06,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:06,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:06,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700431867] [2022-04-06 19:30:06,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700431867] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:06,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36265155] [2022-04-06 19:30:06,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:06,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:06,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:06,838 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) [2022-04-06 19:30:06,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 19:30:06,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:06,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:30:07,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:30:07,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36265155] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:07,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:07,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 26 [2022-04-06 19:30:07,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:07,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [388478794] [2022-04-06 19:30:07,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [388478794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:07,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:07,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:30:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403885965] [2022-04-06 19:30:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:07,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:30:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:30:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:30:07,189 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:07,407 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-04-06 19:30:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:30:07,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 19:30:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:07,410 INFO L225 Difference]: With dead ends: 86 [2022-04-06 19:30:07,410 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 19:30:07,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:30:07,411 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:07,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 46 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 19:30:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-04-06 19:30:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-04-06 19:30:07,414 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2022-04-06 19:30:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:07,414 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-04-06 19:30:07,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-04-06 19:30:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 19:30:07,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:07,414 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:07,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:07,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:07,630 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:07,631 INFO L85 PathProgramCache]: Analyzing trace with hash 986713501, now seen corresponding path program 29 times [2022-04-06 19:30:07,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:07,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2114790638] [2022-04-06 19:30:07,729 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:07,729 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:07,739 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:07,739 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:07,739 INFO L85 PathProgramCache]: Analyzing trace with hash 986713501, now seen corresponding path program 30 times [2022-04-06 19:30:07,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:07,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221782149] [2022-04-06 19:30:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:07,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:07,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221782149] [2022-04-06 19:30:07,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221782149] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214511311] [2022-04-06 19:30:07,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:07,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:07,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:07,956 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) [2022-04-06 19:30:07,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 19:30:08,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:08,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:30:08,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 19:30:08,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 19:30:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214511311] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:08,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:08,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 23 [2022-04-06 19:30:08,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2114790638] [2022-04-06 19:30:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2114790638] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:08,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:08,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:30:08,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134184279] [2022-04-06 19:30:08,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:08,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:30:08,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:08,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:30:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:30:08,254 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:08,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:08,516 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-04-06 19:30:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:30:08,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 19:30:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:08,517 INFO L225 Difference]: With dead ends: 90 [2022-04-06 19:30:08,517 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 19:30:08,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:30:08,517 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:08,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 166 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 19:30:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-04-06 19:30:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-04-06 19:30:08,521 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2022-04-06 19:30:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:08,521 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-04-06 19:30:08,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-04-06 19:30:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 19:30:08,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:08,521 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:08,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:08,721 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:08,722 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash -254592709, now seen corresponding path program 31 times [2022-04-06 19:30:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:08,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1330304160] [2022-04-06 19:30:09,038 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:09,038 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:09,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:09,054 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash -254592709, now seen corresponding path program 32 times [2022-04-06 19:30:09,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:09,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349490587] [2022-04-06 19:30:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:09,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:09,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:09,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349490587] [2022-04-06 19:30:09,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349490587] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316635320] [2022-04-06 19:30:09,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:09,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:09,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:09,301 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) [2022-04-06 19:30:09,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 19:30:09,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:09,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:09,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-04-06 19:30:09,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-04-06 19:30:09,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316635320] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:09,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:09,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6, 6] total 28 [2022-04-06 19:30:09,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:09,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1330304160] [2022-04-06 19:30:09,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1330304160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:09,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:09,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:30:09,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490563994] [2022-04-06 19:30:09,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:09,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:30:09,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:09,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:30:09,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:30:09,694 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:10,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:10,003 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-04-06 19:30:10,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:30:10,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 19:30:10,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:10,003 INFO L225 Difference]: With dead ends: 94 [2022-04-06 19:30:10,003 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 19:30:10,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:30:10,004 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:10,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 76 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:30:10,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 19:30:10,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-04-06 19:30:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-04-06 19:30:10,008 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2022-04-06 19:30:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:10,008 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-04-06 19:30:10,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:10,008 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-04-06 19:30:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 19:30:10,008 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:10,008 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:10,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:10,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:10,211 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash 851047769, now seen corresponding path program 33 times [2022-04-06 19:30:10,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:10,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331447483] [2022-04-06 19:30:10,405 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:10,405 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:10,416 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:10,416 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash 851047769, now seen corresponding path program 34 times [2022-04-06 19:30:10,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:10,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701219719] [2022-04-06 19:30:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:10,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:10,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701219719] [2022-04-06 19:30:10,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701219719] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:10,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260812433] [2022-04-06 19:30:10,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:10,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:10,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:10,680 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) [2022-04-06 19:30:10,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 19:30:10,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:10,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:10,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-04-06 19:30:10,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-04-06 19:30:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260812433] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:11,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:11,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6, 6] total 29 [2022-04-06 19:30:11,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:11,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331447483] [2022-04-06 19:30:11,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331447483] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:11,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:11,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:30:11,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104280255] [2022-04-06 19:30:11,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:11,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:30:11,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:11,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:30:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:30:11,081 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:11,412 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-04-06 19:30:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:30:11,412 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 19:30:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:11,412 INFO L225 Difference]: With dead ends: 98 [2022-04-06 19:30:11,412 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 19:30:11,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:30:11,413 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:11,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 156 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:30:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 19:30:11,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-04-06 19:30:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-04-06 19:30:11,416 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2022-04-06 19:30:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:11,416 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-04-06 19:30:11,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-04-06 19:30:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:30:11,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:11,417 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:11,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:11,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:11,631 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:11,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1780342281, now seen corresponding path program 35 times [2022-04-06 19:30:11,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:11,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1790024324] [2022-04-06 19:30:12,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:12,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:12,040 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:12,040 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1780342281, now seen corresponding path program 36 times [2022-04-06 19:30:12,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:12,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753870749] [2022-04-06 19:30:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:12,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:12,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:12,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:12,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753870749] [2022-04-06 19:30:12,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753870749] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:12,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890047234] [2022-04-06 19:30:12,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:12,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:12,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:12,294 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) [2022-04-06 19:30:12,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 19:30:12,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:12,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:12,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:30:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 19:30:12,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 19:30:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890047234] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:12,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4, 4] total 26 [2022-04-06 19:30:12,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1790024324] [2022-04-06 19:30:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1790024324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:12,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:30:12,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466366771] [2022-04-06 19:30:12,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:12,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:30:12,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:30:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:30:12,555 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:12,924 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2022-04-06 19:30:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:30:12,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 19:30:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:12,925 INFO L225 Difference]: With dead ends: 102 [2022-04-06 19:30:12,925 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 19:30:12,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:30:12,927 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:12,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 166 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:30:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 19:30:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-04-06 19:30:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-04-06 19:30:12,931 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2022-04-06 19:30:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:12,931 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-04-06 19:30:12,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-04-06 19:30:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 19:30:12,931 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:12,932 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:12,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:13,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:13,143 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash -810442987, now seen corresponding path program 37 times [2022-04-06 19:30:13,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:13,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [584520864] [2022-04-06 19:30:13,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:13,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:13,350 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:13,350 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash -810442987, now seen corresponding path program 38 times [2022-04-06 19:30:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:13,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603002460] [2022-04-06 19:30:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:13,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:13,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:13,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:13,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603002460] [2022-04-06 19:30:13,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603002460] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:13,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28724084] [2022-04-06 19:30:13,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:13,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:13,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:13,623 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) [2022-04-06 19:30:13,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 19:30:13,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:13,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:13,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:13,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-04-06 19:30:13,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-04-06 19:30:14,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28724084] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:14,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:14,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6, 6] total 31 [2022-04-06 19:30:14,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [584520864] [2022-04-06 19:30:14,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [584520864] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:14,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:14,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:30:14,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016952699] [2022-04-06 19:30:14,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:14,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:30:14,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:14,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:30:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:30:14,097 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:14,492 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-04-06 19:30:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:30:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 19:30:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:14,494 INFO L225 Difference]: With dead ends: 106 [2022-04-06 19:30:14,494 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 19:30:14,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:30:14,498 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:14,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:30:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 19:30:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-04-06 19:30:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-04-06 19:30:14,502 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2022-04-06 19:30:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:14,503 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-04-06 19:30:14,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-04-06 19:30:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 19:30:14,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:14,504 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:14,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:14,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:14,723 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:14,723 INFO L85 PathProgramCache]: Analyzing trace with hash -745124685, now seen corresponding path program 39 times [2022-04-06 19:30:14,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [748539782] [2022-04-06 19:30:14,915 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:14,915 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:14,931 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:14,932 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash -745124685, now seen corresponding path program 40 times [2022-04-06 19:30:14,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:14,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969853321] [2022-04-06 19:30:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:15,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:15,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969853321] [2022-04-06 19:30:15,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969853321] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199304088] [2022-04-06 19:30:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:15,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:15,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:15,273 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) [2022-04-06 19:30:15,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 19:30:15,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:15,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:15,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:15,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-04-06 19:30:15,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-04-06 19:30:15,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199304088] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:15,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:15,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 32 [2022-04-06 19:30:15,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:15,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [748539782] [2022-04-06 19:30:15,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [748539782] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:15,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:15,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:30:15,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998659302] [2022-04-06 19:30:15,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:15,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:30:15,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:30:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:30:15,704 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:16,161 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2022-04-06 19:30:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:30:16,162 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 19:30:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:16,162 INFO L225 Difference]: With dead ends: 110 [2022-04-06 19:30:16,162 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 19:30:16,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:30:16,163 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:16,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:30:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 19:30:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-04-06 19:30:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-04-06 19:30:16,166 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2022-04-06 19:30:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:16,166 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-04-06 19:30:16,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-04-06 19:30:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 19:30:16,167 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:16,167 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:16,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:16,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-04-06 19:30:16,377 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:16,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1896221393, now seen corresponding path program 41 times [2022-04-06 19:30:16,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:16,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [268486510] [2022-04-06 19:30:16,610 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:16,610 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:16,628 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:16,628 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:16,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1896221393, now seen corresponding path program 42 times [2022-04-06 19:30:16,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:16,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57207128] [2022-04-06 19:30:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:16,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:16,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:16,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:16,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57207128] [2022-04-06 19:30:16,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57207128] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:16,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613620612] [2022-04-06 19:30:16,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:16,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:16,942 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) [2022-04-06 19:30:16,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 19:30:17,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:30:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-04-06 19:30:17,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-04-06 19:30:17,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613620612] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:17,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:17,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 29 [2022-04-06 19:30:17,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:17,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [268486510] [2022-04-06 19:30:17,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [268486510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:17,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:17,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 19:30:17,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987149368] [2022-04-06 19:30:17,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:17,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 19:30:17,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:17,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 19:30:17,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:30:17,251 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:17,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:17,703 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2022-04-06 19:30:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 19:30:17,703 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 19:30:17,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:17,703 INFO L225 Difference]: With dead ends: 114 [2022-04-06 19:30:17,703 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 19:30:17,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:30:17,704 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:17,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 126 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:30:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 19:30:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-04-06 19:30:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-04-06 19:30:17,708 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2022-04-06 19:30:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:17,708 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-04-06 19:30:17,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-04-06 19:30:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 19:30:17,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:17,708 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:17,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 19:30:17,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 19:30:17,915 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1904130415, now seen corresponding path program 43 times [2022-04-06 19:30:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:17,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2132890493] [2022-04-06 19:30:18,100 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:18,100 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:18,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:18,125 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1904130415, now seen corresponding path program 44 times [2022-04-06 19:30:18,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:18,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523918012] [2022-04-06 19:30:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:18,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:18,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:18,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:18,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523918012] [2022-04-06 19:30:18,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523918012] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:18,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056409126] [2022-04-06 19:30:18,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:18,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:18,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:18,485 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) [2022-04-06 19:30:18,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 19:30:18,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:18,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:18,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:18,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2022-04-06 19:30:18,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2022-04-06 19:30:18,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056409126] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:18,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:18,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 6, 6] total 34 [2022-04-06 19:30:18,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2132890493] [2022-04-06 19:30:18,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2132890493] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:18,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:18,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 19:30:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764756404] [2022-04-06 19:30:18,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:18,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 19:30:18,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 19:30:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:30:18,929 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:19,412 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2022-04-06 19:30:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:30:19,417 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 19:30:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:19,417 INFO L225 Difference]: With dead ends: 118 [2022-04-06 19:30:19,417 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 19:30:19,418 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:30:19,418 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:19,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 216 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:30:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 19:30:19,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-04-06 19:30:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-04-06 19:30:19,423 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2022-04-06 19:30:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:19,423 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-04-06 19:30:19,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-04-06 19:30:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 19:30:19,424 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:19,424 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:19,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 19:30:19,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 19:30:19,637 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:19,638 INFO L85 PathProgramCache]: Analyzing trace with hash 914765965, now seen corresponding path program 45 times [2022-04-06 19:30:19,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:19,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2102134466] [2022-04-06 19:30:19,906 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:19,906 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:19,924 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:19,924 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash 914765965, now seen corresponding path program 46 times [2022-04-06 19:30:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:19,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183274552] [2022-04-06 19:30:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:19,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:20,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:20,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183274552] [2022-04-06 19:30:20,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183274552] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191244844] [2022-04-06 19:30:20,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:20,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:20,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:20,329 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) [2022-04-06 19:30:20,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 19:30:20,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:20,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2022-04-06 19:30:20,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2022-04-06 19:30:20,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191244844] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:20,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:20,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 6, 6] total 35 [2022-04-06 19:30:20,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:20,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2102134466] [2022-04-06 19:30:20,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2102134466] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:20,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:20,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 19:30:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030536159] [2022-04-06 19:30:20,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:20,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 19:30:20,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 19:30:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:30:20,815 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:21,351 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2022-04-06 19:30:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 19:30:21,351 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 19:30:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:21,352 INFO L225 Difference]: With dead ends: 122 [2022-04-06 19:30:21,352 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 19:30:21,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:30:21,353 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:21,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 236 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:30:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 19:30:21,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-04-06 19:30:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-04-06 19:30:21,356 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2022-04-06 19:30:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:21,356 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-04-06 19:30:21,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-04-06 19:30:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 19:30:21,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:21,357 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:21,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 19:30:21,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:21,573 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash -676698069, now seen corresponding path program 47 times [2022-04-06 19:30:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:21,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1253041690] [2022-04-06 19:30:22,211 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:22,212 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:22,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:22,229 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash -676698069, now seen corresponding path program 48 times [2022-04-06 19:30:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:22,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312574495] [2022-04-06 19:30:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:22,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:22,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312574495] [2022-04-06 19:30:22,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312574495] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939588892] [2022-04-06 19:30:22,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:22,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:22,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:22,621 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) [2022-04-06 19:30:22,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 19:30:22,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:22,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:22,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:30:22,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2022-04-06 19:30:22,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2022-04-06 19:30:23,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939588892] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:23,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:23,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 32 [2022-04-06 19:30:23,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:23,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1253041690] [2022-04-06 19:30:23,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1253041690] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:23,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:23,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 19:30:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081970916] [2022-04-06 19:30:23,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:23,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 19:30:23,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 19:30:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:30:23,028 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:23,605 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2022-04-06 19:30:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:30:23,605 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 19:30:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:23,606 INFO L225 Difference]: With dead ends: 126 [2022-04-06 19:30:23,606 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 19:30:23,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:30:23,606 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:23,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 56 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:30:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 19:30:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2022-04-06 19:30:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-04-06 19:30:23,610 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2022-04-06 19:30:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:23,610 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-04-06 19:30:23,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-04-06 19:30:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 19:30:23,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:23,611 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:23,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:23,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:30:23,823 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1065277367, now seen corresponding path program 49 times [2022-04-06 19:30:23,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:23,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1830786098] [2022-04-06 19:30:24,700 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:24,700 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:24,717 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:24,717 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1065277367, now seen corresponding path program 50 times [2022-04-06 19:30:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:24,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664286161] [2022-04-06 19:30:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:24,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:25,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:25,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:25,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664286161] [2022-04-06 19:30:25,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664286161] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:25,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246336058] [2022-04-06 19:30:25,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:25,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:25,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:25,155 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) [2022-04-06 19:30:25,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 19:30:25,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:25,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:25,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:25,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2022-04-06 19:30:25,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2022-04-06 19:30:25,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246336058] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:25,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:25,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 6, 6] total 37 [2022-04-06 19:30:25,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:25,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1830786098] [2022-04-06 19:30:25,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1830786098] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:25,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:25,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 19:30:25,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809121307] [2022-04-06 19:30:25,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:25,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 19:30:25,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 19:30:25,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:30:25,672 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:26,305 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2022-04-06 19:30:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 19:30:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 19:30:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:26,308 INFO L225 Difference]: With dead ends: 130 [2022-04-06 19:30:26,308 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 19:30:26,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:30:26,309 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:26,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 146 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:30:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 19:30:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-04-06 19:30:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-04-06 19:30:26,313 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2022-04-06 19:30:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:26,313 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-04-06 19:30:26,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-04-06 19:30:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 19:30:26,314 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:26,314 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:26,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 19:30:26,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:30:26,519 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash -827827993, now seen corresponding path program 51 times [2022-04-06 19:30:26,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:26,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1628813646] [2022-04-06 19:30:27,388 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:27,388 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:27,422 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:27,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash -827827993, now seen corresponding path program 52 times [2022-04-06 19:30:27,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:27,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276230139] [2022-04-06 19:30:27,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:27,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:27,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276230139] [2022-04-06 19:30:27,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276230139] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438579700] [2022-04-06 19:30:27,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:27,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:27,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:27,881 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) [2022-04-06 19:30:27,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 19:30:28,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:28,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:28,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-04-06 19:30:28,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-04-06 19:30:28,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438579700] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:28,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:28,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 6, 6] total 38 [2022-04-06 19:30:28,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:28,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1628813646] [2022-04-06 19:30:28,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1628813646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:28,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:28,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 19:30:28,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827885148] [2022-04-06 19:30:28,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:28,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 19:30:28,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:28,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 19:30:28,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:30:28,407 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:29,050 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2022-04-06 19:30:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 19:30:29,050 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 19:30:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:29,051 INFO L225 Difference]: With dead ends: 134 [2022-04-06 19:30:29,051 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 19:30:29,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:30:29,052 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:29,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 46 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:30:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 19:30:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-04-06 19:30:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-04-06 19:30:29,055 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2022-04-06 19:30:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:29,056 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-04-06 19:30:29,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-04-06 19:30:29,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 19:30:29,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:29,056 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:29,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 19:30:29,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:29,271 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash -272246267, now seen corresponding path program 53 times [2022-04-06 19:30:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:29,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933663487] [2022-04-06 19:30:30,611 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:30,611 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:30,650 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:30,651 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:30,651 INFO L85 PathProgramCache]: Analyzing trace with hash -272246267, now seen corresponding path program 54 times [2022-04-06 19:30:30,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:30,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164024372] [2022-04-06 19:30:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:30,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:31,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164024372] [2022-04-06 19:30:31,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164024372] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614050358] [2022-04-06 19:30:31,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:31,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:31,154 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) [2022-04-06 19:30:31,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 19:30:31,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:31,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:31,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:30:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-04-06 19:30:31,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-04-06 19:30:31,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614050358] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:31,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:31,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 4, 4] total 35 [2022-04-06 19:30:31,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:31,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933663487] [2022-04-06 19:30:31,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933663487] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:31,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:31,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 19:30:31,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533913069] [2022-04-06 19:30:31,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:31,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 19:30:31,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:31,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 19:30:31,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:30:31,588 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:32,283 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2022-04-06 19:30:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 19:30:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 19:30:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:32,284 INFO L225 Difference]: With dead ends: 138 [2022-04-06 19:30:32,284 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 19:30:32,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:30:32,285 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:32,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 56 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:30:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 19:30:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-04-06 19:30:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-04-06 19:30:32,288 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2022-04-06 19:30:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:32,289 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-04-06 19:30:32,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-04-06 19:30:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 19:30:32,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:32,289 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:32,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:32,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:32,505 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1065847715, now seen corresponding path program 55 times [2022-04-06 19:30:32,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:32,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1125471459] [2022-04-06 19:30:33,298 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:33,298 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:33,333 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:33,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1065847715, now seen corresponding path program 56 times [2022-04-06 19:30:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073556688] [2022-04-06 19:30:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:33,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:33,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:33,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073556688] [2022-04-06 19:30:33,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073556688] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63185006] [2022-04-06 19:30:33,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:33,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:33,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:33,854 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) [2022-04-06 19:30:33,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 19:30:33,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:33,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:33,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:33,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-04-06 19:30:34,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-04-06 19:30:34,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63185006] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:34,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:34,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 6, 6] total 40 [2022-04-06 19:30:34,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:34,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1125471459] [2022-04-06 19:30:34,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1125471459] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:34,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:34,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 19:30:34,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718993590] [2022-04-06 19:30:34,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:34,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 19:30:34,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:34,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 19:30:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:30:34,403 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:35,181 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2022-04-06 19:30:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 19:30:35,182 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 19:30:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:35,182 INFO L225 Difference]: With dead ends: 142 [2022-04-06 19:30:35,182 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 19:30:35,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:30:35,183 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:35,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 286 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1773 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:30:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 19:30:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-04-06 19:30:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-04-06 19:30:35,187 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2022-04-06 19:30:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:35,187 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-04-06 19:30:35,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-04-06 19:30:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 19:30:35,187 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:35,187 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:35,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 19:30:35,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:35,399 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1516024383, now seen corresponding path program 57 times [2022-04-06 19:30:35,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:35,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1726475294] [2022-04-06 19:30:36,571 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:36,572 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:36,597 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:36,597 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1516024383, now seen corresponding path program 58 times [2022-04-06 19:30:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:36,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865296504] [2022-04-06 19:30:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:37,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:37,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:37,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865296504] [2022-04-06 19:30:37,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865296504] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:37,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021627683] [2022-04-06 19:30:37,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:37,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:37,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:37,140 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) [2022-04-06 19:30:37,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 19:30:37,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:37,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:37,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:37,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 1 proven. 86 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-04-06 19:30:37,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-04-06 19:30:37,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021627683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:37,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:37,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 6, 6] total 41 [2022-04-06 19:30:37,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:37,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1726475294] [2022-04-06 19:30:37,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1726475294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:37,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:37,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 19:30:37,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734244030] [2022-04-06 19:30:37,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:37,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 19:30:37,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:37,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 19:30:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:30:37,724 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:38,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:38,537 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2022-04-06 19:30:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 19:30:38,538 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 19:30:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:38,538 INFO L225 Difference]: With dead ends: 146 [2022-04-06 19:30:38,538 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 19:30:38,539 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:30:38,539 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:38,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 36 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:30:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 19:30:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-04-06 19:30:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-04-06 19:30:38,543 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2022-04-06 19:30:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:38,543 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-04-06 19:30:38,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-04-06 19:30:38,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 19:30:38,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:38,544 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:38,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 19:30:38,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:38,745 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:38,745 INFO L85 PathProgramCache]: Analyzing trace with hash -204013473, now seen corresponding path program 59 times [2022-04-06 19:30:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:38,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922545564] [2022-04-06 19:30:40,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:40,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:40,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:40,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash -204013473, now seen corresponding path program 60 times [2022-04-06 19:30:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:40,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688416049] [2022-04-06 19:30:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:40,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:41,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:41,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:41,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688416049] [2022-04-06 19:30:41,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688416049] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:41,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615674401] [2022-04-06 19:30:41,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:41,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:41,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:41,327 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) [2022-04-06 19:30:41,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 19:30:41,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:41,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:30:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2022-04-06 19:30:41,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2022-04-06 19:30:41,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615674401] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:41,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:41,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 38 [2022-04-06 19:30:41,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:41,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922545564] [2022-04-06 19:30:41,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922545564] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:41,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:41,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 19:30:41,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440062723] [2022-04-06 19:30:41,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:41,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 19:30:41,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:41,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 19:30:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:30:41,783 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:42,672 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2022-04-06 19:30:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 19:30:42,672 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 19:30:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:42,673 INFO L225 Difference]: With dead ends: 150 [2022-04-06 19:30:42,673 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 19:30:42,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:30:42,673 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:42,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 186 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:30:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 19:30:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2022-04-06 19:30:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-04-06 19:30:42,677 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2022-04-06 19:30:42,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:42,678 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-04-06 19:30:42,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-04-06 19:30:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 19:30:42,678 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:42,678 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:42,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:42,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 19:30:42,887 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:42,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2081913987, now seen corresponding path program 61 times [2022-04-06 19:30:42,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:42,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989446899] [2022-04-06 19:30:44,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:44,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:44,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:44,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:44,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2081913987, now seen corresponding path program 62 times [2022-04-06 19:30:44,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:44,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493309121] [2022-04-06 19:30:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:44,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:44,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493309121] [2022-04-06 19:30:44,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493309121] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:44,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592105523] [2022-04-06 19:30:44,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:44,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:44,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:44,947 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) [2022-04-06 19:30:44,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 19:30:45,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:45,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:45,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2022-04-06 19:30:45,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2022-04-06 19:30:45,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592105523] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:45,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:45,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 6, 6] total 43 [2022-04-06 19:30:45,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989446899] [2022-04-06 19:30:45,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989446899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:45,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:45,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 19:30:45,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245567129] [2022-04-06 19:30:45,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:45,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 19:30:45,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:45,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 19:30:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:30:45,552 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:46,497 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2022-04-06 19:30:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 19:30:46,497 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 19:30:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:46,498 INFO L225 Difference]: With dead ends: 154 [2022-04-06 19:30:46,498 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 19:30:46,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1749, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:30:46,499 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:46,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 336 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:30:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 19:30:46,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2022-04-06 19:30:46,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-04-06 19:30:46,503 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2022-04-06 19:30:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:46,503 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-04-06 19:30:46,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-04-06 19:30:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 19:30:46,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:46,504 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:46,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:46,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:46,721 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:46,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1436923675, now seen corresponding path program 63 times [2022-04-06 19:30:46,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:46,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2088932043] [2022-04-06 19:30:49,027 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:49,027 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:49,055 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:49,055 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:49,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1436923675, now seen corresponding path program 64 times [2022-04-06 19:30:49,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:49,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122062249] [2022-04-06 19:30:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:49,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:49,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122062249] [2022-04-06 19:30:49,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122062249] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735540328] [2022-04-06 19:30:49,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:49,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:49,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:49,687 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) [2022-04-06 19:30:49,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 19:30:49,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:49,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:49,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:49,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2022-04-06 19:30:50,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2022-04-06 19:30:50,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735540328] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:50,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:50,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 6, 6] total 44 [2022-04-06 19:30:50,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:50,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2088932043] [2022-04-06 19:30:50,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2088932043] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:50,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:50,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 19:30:50,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052076684] [2022-04-06 19:30:50,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:50,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 19:30:50,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:50,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 19:30:50,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1751, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:30:50,313 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:51,328 INFO L93 Difference]: Finished difference Result 158 states and 163 transitions. [2022-04-06 19:30:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 19:30:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 19:30:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:51,333 INFO L225 Difference]: With dead ends: 158 [2022-04-06 19:30:51,333 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 19:30:51,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:30:51,334 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:51,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:30:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 19:30:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2022-04-06 19:30:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-04-06 19:30:51,339 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2022-04-06 19:30:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:51,339 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-04-06 19:30:51,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:51,339 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-04-06 19:30:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 19:30:51,339 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:51,340 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:51,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:51,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:51,551 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1394312391, now seen corresponding path program 65 times [2022-04-06 19:30:51,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:51,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113253267] [2022-04-06 19:30:53,086 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:53,087 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:53,115 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:53,115 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1394312391, now seen corresponding path program 66 times [2022-04-06 19:30:53,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:53,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000731622] [2022-04-06 19:30:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:53,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:53,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:53,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:53,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000731622] [2022-04-06 19:30:53,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000731622] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:53,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105292475] [2022-04-06 19:30:53,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:53,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:53,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:53,773 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) [2022-04-06 19:30:53,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 19:30:53,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:53,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:53,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:30:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2022-04-06 19:30:54,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2022-04-06 19:30:54,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105292475] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:54,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:54,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 4, 4] total 41 [2022-04-06 19:30:54,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:54,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113253267] [2022-04-06 19:30:54,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113253267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:54,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:54,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 19:30:54,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85764933] [2022-04-06 19:30:54,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:54,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 19:30:54,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 19:30:54,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:30:54,241 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:55,300 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2022-04-06 19:30:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 19:30:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 19:30:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:55,301 INFO L225 Difference]: With dead ends: 162 [2022-04-06 19:30:55,301 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 19:30:55,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:30:55,302 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:55,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 166 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:30:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 19:30:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-04-06 19:30:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-04-06 19:30:55,306 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2022-04-06 19:30:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:55,306 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-04-06 19:30:55,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-04-06 19:30:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:30:55,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:55,307 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:55,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 19:30:55,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 19:30:55,507 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash 797093847, now seen corresponding path program 67 times [2022-04-06 19:30:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1551893217] [2022-04-06 19:30:56,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:56,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:56,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:56,954 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 797093847, now seen corresponding path program 68 times [2022-04-06 19:30:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:56,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293770112] [2022-04-06 19:30:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:57,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:57,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:57,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293770112] [2022-04-06 19:30:57,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293770112] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:57,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893319936] [2022-04-06 19:30:57,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:57,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:57,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:57,629 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) [2022-04-06 19:30:57,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 19:30:57,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:57,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:57,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:30:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2022-04-06 19:30:58,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2022-04-06 19:30:58,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893319936] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:58,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:58,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 6, 6] total 46 [2022-04-06 19:30:58,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:58,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1551893217] [2022-04-06 19:30:58,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1551893217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:58,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:58,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 19:30:58,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748030360] [2022-04-06 19:30:58,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:58,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 19:30:58,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:58,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 19:30:58,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:30:58,305 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:59,427 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2022-04-06 19:30:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 19:30:59,427 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 19:30:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:59,428 INFO L225 Difference]: With dead ends: 166 [2022-04-06 19:30:59,428 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 19:30:59,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=2010, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:30:59,429 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:59,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 286 Invalid, 2572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:30:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 19:30:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-04-06 19:30:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-04-06 19:30:59,433 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2022-04-06 19:30:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:59,433 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-04-06 19:30:59,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-04-06 19:30:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:30:59,434 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:59,434 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:59,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 19:30:59,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 19:30:59,650 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:59,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2090453771, now seen corresponding path program 69 times [2022-04-06 19:30:59,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:59,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1585183744] [2022-04-06 19:31:05,557 WARN L232 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 656 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:31:05,638 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:05,638 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:05,698 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:05,698 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:05,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2090453771, now seen corresponding path program 70 times [2022-04-06 19:31:05,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:05,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089295329] [2022-04-06 19:31:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:05,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:06,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:06,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089295329] [2022-04-06 19:31:06,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089295329] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125847379] [2022-04-06 19:31:06,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:31:06,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:06,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:06,374 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) [2022-04-06 19:31:06,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 19:31:06,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:31:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:31:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2022-04-06 19:31:06,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2022-04-06 19:31:07,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125847379] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:07,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:07,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 6, 6] total 47 [2022-04-06 19:31:07,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1585183744] [2022-04-06 19:31:07,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1585183744] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:07,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:07,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 19:31:07,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118992364] [2022-04-06 19:31:07,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:07,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 19:31:07,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 19:31:07,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2012, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:31:07,042 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:08,241 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2022-04-06 19:31:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 19:31:08,242 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 19:31:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:08,242 INFO L225 Difference]: With dead ends: 170 [2022-04-06 19:31:08,242 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 19:31:08,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=2101, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:31:08,243 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:08,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 276 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:31:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 19:31:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-04-06 19:31:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-04-06 19:31:08,247 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2022-04-06 19:31:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:08,248 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-04-06 19:31:08,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-04-06 19:31:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 19:31:08,248 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:08,248 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:08,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 19:31:08,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 19:31:08,465 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1820125843, now seen corresponding path program 71 times [2022-04-06 19:31:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933764895] [2022-04-06 19:31:13,998 WARN L232 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 674 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:31:14,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:14,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:14,129 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:14,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:14,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1820125843, now seen corresponding path program 72 times [2022-04-06 19:31:14,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:14,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143448518] [2022-04-06 19:31:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:14,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:14,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:14,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:14,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143448518] [2022-04-06 19:31:14,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143448518] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:14,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18190100] [2022-04-06 19:31:14,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:31:14,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:14,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:14,895 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) [2022-04-06 19:31:14,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 19:31:15,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:31:15,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:15,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:31:15,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2022-04-06 19:31:15,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2022-04-06 19:31:15,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18190100] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:15,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:15,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 4, 4] total 44 [2022-04-06 19:31:15,418 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933764895] [2022-04-06 19:31:15,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933764895] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:15,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:15,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 19:31:15,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110009170] [2022-04-06 19:31:15,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:15,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 19:31:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 19:31:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:31:15,419 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:16,697 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2022-04-06 19:31:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 19:31:16,698 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-04-06 19:31:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:16,698 INFO L225 Difference]: With dead ends: 174 [2022-04-06 19:31:16,698 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 19:31:16,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:31:16,706 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 2817 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:16,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 276 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2817 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 19:31:16,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 19:31:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-04-06 19:31:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:16,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-04-06 19:31:16,711 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2022-04-06 19:31:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:16,711 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-04-06 19:31:16,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-04-06 19:31:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 19:31:16,712 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:16,712 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:16,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 19:31:16,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 19:31:16,929 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1790750897, now seen corresponding path program 73 times [2022-04-06 19:31:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:16,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [606853801] [2022-04-06 19:31:22,662 WARN L232 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 692 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:31:22,743 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:22,743 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:22,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:22,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1790750897, now seen corresponding path program 74 times [2022-04-06 19:31:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:22,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141204881] [2022-04-06 19:31:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:22,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:23,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 2 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:23,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141204881] [2022-04-06 19:31:23,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141204881] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244437240] [2022-04-06 19:31:23,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:31:23,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:23,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:23,610 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) [2022-04-06 19:31:23,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 19:31:23,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:31:23,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:23,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:31:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2022-04-06 19:31:24,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2022-04-06 19:31:24,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244437240] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:24,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:24,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 6, 6] total 49 [2022-04-06 19:31:24,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:24,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [606853801] [2022-04-06 19:31:24,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [606853801] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:24,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:24,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 19:31:24,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517841872] [2022-04-06 19:31:24,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:24,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 19:31:24,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 19:31:24,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:31:24,327 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:25,632 INFO L93 Difference]: Finished difference Result 178 states and 183 transitions. [2022-04-06 19:31:25,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 19:31:25,632 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 19:31:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:25,633 INFO L225 Difference]: With dead ends: 178 [2022-04-06 19:31:25,633 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 19:31:25,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=2289, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:31:25,634 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:25,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 36 Invalid, 2910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2870 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 19:31:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 19:31:25,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2022-04-06 19:31:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-04-06 19:31:25,638 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2022-04-06 19:31:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:25,639 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-04-06 19:31:25,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-04-06 19:31:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 19:31:25,639 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:25,639 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:25,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 19:31:25,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:25,839 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:25,840 INFO L85 PathProgramCache]: Analyzing trace with hash -668768433, now seen corresponding path program 75 times [2022-04-06 19:31:25,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:25,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475299040] [2022-04-06 19:31:26,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:26,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:27,006 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:27,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -668768433, now seen corresponding path program 76 times [2022-04-06 19:31:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:27,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826950194] [2022-04-06 19:31:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:27,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 2 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:27,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:27,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826950194] [2022-04-06 19:31:27,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826950194] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:27,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999054576] [2022-04-06 19:31:27,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:31:27,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:27,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:27,861 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) [2022-04-06 19:31:27,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 19:31:28,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:31:28,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:28,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:31:28,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2022-04-06 19:31:28,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2022-04-06 19:31:28,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999054576] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:28,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:28,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 6, 6] total 50 [2022-04-06 19:31:28,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:28,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475299040] [2022-04-06 19:31:28,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475299040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:28,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:28,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 19:31:28,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205999278] [2022-04-06 19:31:28,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:28,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 19:31:28,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 19:31:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2291, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:31:28,589 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:29,981 INFO L93 Difference]: Finished difference Result 182 states and 187 transitions. [2022-04-06 19:31:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 19:31:29,982 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 19:31:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:29,982 INFO L225 Difference]: With dead ends: 182 [2022-04-06 19:31:29,982 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 19:31:29,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=2386, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:31:29,983 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3067 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 3108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:29,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 146 Invalid, 3108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3067 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 19:31:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 19:31:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2022-04-06 19:31:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-04-06 19:31:30,004 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2022-04-06 19:31:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:30,004 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-04-06 19:31:30,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-04-06 19:31:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:31:30,004 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:30,005 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:30,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 19:31:30,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 19:31:30,206 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:30,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2034831763, now seen corresponding path program 77 times [2022-04-06 19:31:30,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:30,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [199881951] [2022-04-06 19:31:31,918 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:31,919 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:31,968 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:31,968 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2034831763, now seen corresponding path program 78 times [2022-04-06 19:31:31,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932305006] [2022-04-06 19:31:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:31,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:32,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 2 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:32,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:32,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932305006] [2022-04-06 19:31:32,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932305006] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:32,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293090361] [2022-04-06 19:31:32,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:31:32,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:32,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:32,847 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) [2022-04-06 19:31:32,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 19:31:33,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:31:33,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:31:33,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2022-04-06 19:31:33,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2022-04-06 19:31:33,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293090361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:33,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:33,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 4, 4] total 47 [2022-04-06 19:31:33,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:33,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [199881951] [2022-04-06 19:31:33,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [199881951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:33,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:33,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 19:31:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486569633] [2022-04-06 19:31:33,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:33,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 19:31:33,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 19:31:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:31:33,418 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:34,924 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2022-04-06 19:31:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 19:31:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 19:31:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:34,925 INFO L225 Difference]: With dead ends: 186 [2022-04-06 19:31:34,925 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 19:31:34,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:31:34,926 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 3334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:34,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 316 Invalid, 3334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:31:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 19:31:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-04-06 19:31:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-04-06 19:31:34,931 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2022-04-06 19:31:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:34,931 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-04-06 19:31:34,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-04-06 19:31:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 19:31:34,931 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:34,932 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:34,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 19:31:35,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 19:31:35,148 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash -561699317, now seen corresponding path program 79 times [2022-04-06 19:31:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:35,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1706838054] [2022-04-06 19:31:37,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:37,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:37,118 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:37,118 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash -561699317, now seen corresponding path program 80 times [2022-04-06 19:31:37,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:37,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031521089] [2022-04-06 19:31:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:37,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:37,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 2 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:38,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:38,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031521089] [2022-04-06 19:31:38,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031521089] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:38,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707688091] [2022-04-06 19:31:38,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:31:38,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:38,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:38,005 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) [2022-04-06 19:31:38,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 19:31:38,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:31:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:31:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 1483 trivial. 0 not checked. [2022-04-06 19:31:38,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 1483 trivial. 0 not checked. [2022-04-06 19:31:38,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707688091] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:38,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:38,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 6, 6] total 52 [2022-04-06 19:31:38,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1706838054] [2022-04-06 19:31:38,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1706838054] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:38,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:38,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 19:31:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422622081] [2022-04-06 19:31:38,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:38,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 19:31:38,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 19:31:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2487, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:31:38,784 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:40,357 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2022-04-06 19:31:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 19:31:40,357 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 19:31:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:40,358 INFO L225 Difference]: With dead ends: 190 [2022-04-06 19:31:40,358 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 19:31:40,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=170, Invalid=2586, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 19:31:40,359 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 3469 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 3512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:40,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 356 Invalid, 3512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3469 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:31:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 19:31:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2022-04-06 19:31:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-04-06 19:31:40,364 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2022-04-06 19:31:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:40,364 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-04-06 19:31:40,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-04-06 19:31:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 19:31:40,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:40,364 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:40,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 19:31:40,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 19:31:40,565 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:40,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:40,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2074340905, now seen corresponding path program 81 times [2022-04-06 19:31:40,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:40,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1985353759] [2022-04-06 19:31:41,417 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:41,417 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:41,460 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:41,460 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2074340905, now seen corresponding path program 82 times [2022-04-06 19:31:41,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:41,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550829369] [2022-04-06 19:31:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:41,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:42,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 2 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550829369] [2022-04-06 19:31:42,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550829369] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177161076] [2022-04-06 19:31:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:31:42,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:42,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:42,355 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) [2022-04-06 19:31:42,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 19:31:42,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:31:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:31:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2022-04-06 19:31:42,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2022-04-06 19:31:43,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177161076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:43,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:43,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 6, 6] total 53 [2022-04-06 19:31:43,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:43,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1985353759] [2022-04-06 19:31:43,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1985353759] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:43,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:43,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 19:31:43,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224535940] [2022-04-06 19:31:43,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:43,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 19:31:43,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:43,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 19:31:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 19:31:43,164 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:44,848 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2022-04-06 19:31:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 19:31:44,849 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-04-06 19:31:44,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:44,849 INFO L225 Difference]: With dead ends: 194 [2022-04-06 19:31:44,849 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 19:31:44,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=2689, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 19:31:44,850 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 3638 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 3682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:44,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 366 Invalid, 3682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3638 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 19:31:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 19:31:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-04-06 19:31:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-04-06 19:31:44,855 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2022-04-06 19:31:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:44,855 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-04-06 19:31:44,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-04-06 19:31:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 19:31:44,856 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:44,856 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:44,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 19:31:45,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:45,073 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:45,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1278289607, now seen corresponding path program 83 times [2022-04-06 19:31:45,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:45,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [239128873] [2022-04-06 19:31:47,504 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:47,504 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:47,572 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:47,572 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1278289607, now seen corresponding path program 84 times [2022-04-06 19:31:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:47,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714426827] [2022-04-06 19:31:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:47,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:48,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 2 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:48,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:48,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714426827] [2022-04-06 19:31:48,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714426827] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:48,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626220756] [2022-04-06 19:31:48,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:31:48,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:48,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:48,537 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) [2022-04-06 19:31:48,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 19:31:48,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:31:48,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:31:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-04-06 19:31:48,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-04-06 19:31:49,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626220756] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:49,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:49,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 4, 4] total 50 [2022-04-06 19:31:49,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:49,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [239128873] [2022-04-06 19:31:49,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [239128873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:49,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:49,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 19:31:49,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985463986] [2022-04-06 19:31:49,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:49,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 19:31:49,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:49,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 19:31:49,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:31:49,160 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:50,942 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2022-04-06 19:31:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 19:31:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-04-06 19:31:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:50,943 INFO L225 Difference]: With dead ends: 198 [2022-04-06 19:31:50,943 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 19:31:50,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:31:50,943 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 3819 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 3864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:50,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 396 Invalid, 3864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3819 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 19:31:50,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 19:31:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2022-04-06 19:31:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2022-04-06 19:31:50,949 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2022-04-06 19:31:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:50,949 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2022-04-06 19:31:50,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2022-04-06 19:31:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 19:31:50,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:50,949 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:50,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 19:31:51,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:51,163 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash 777170917, now seen corresponding path program 85 times [2022-04-06 19:31:51,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:51,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165429142] [2022-04-06 19:31:57,550 WARN L232 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 800 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:31:57,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:57,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:57,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:57,714 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 777170917, now seen corresponding path program 86 times [2022-04-06 19:31:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:57,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564136728] [2022-04-06 19:31:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:57,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:58,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 2 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:58,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:58,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564136728] [2022-04-06 19:31:58,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564136728] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:58,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480023959] [2022-04-06 19:31:58,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:31:58,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:58,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:58,707 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) [2022-04-06 19:31:58,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 19:31:58,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:31:58,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:58,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:31:58,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 1723 trivial. 0 not checked. [2022-04-06 19:31:59,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 1723 trivial. 0 not checked. [2022-04-06 19:31:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480023959] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:59,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:59,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 6, 6] total 55 [2022-04-06 19:31:59,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165429142] [2022-04-06 19:31:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165429142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:59,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:59,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 19:31:59,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512041497] [2022-04-06 19:31:59,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:59,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 19:31:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 19:31:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2796, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:31:59,537 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:01,385 INFO L93 Difference]: Finished difference Result 202 states and 207 transitions. [2022-04-06 19:32:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 19:32:01,386 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-06 19:32:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:01,386 INFO L225 Difference]: With dead ends: 202 [2022-04-06 19:32:01,386 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 19:32:01,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 19:32:01,387 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3844 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 3890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:01,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 26 Invalid, 3890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3844 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 19:32:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 19:32:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2022-04-06 19:32:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2022-04-06 19:32:01,392 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2022-04-06 19:32:01,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:01,393 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2022-04-06 19:32:01,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2022-04-06 19:32:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 19:32:01,393 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:01,393 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:01,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 19:32:01,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 19:32:01,594 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:01,594 INFO L85 PathProgramCache]: Analyzing trace with hash 238446979, now seen corresponding path program 87 times [2022-04-06 19:32:01,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:01,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [998066049] [2022-04-06 19:32:04,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:04,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:04,886 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:04,886 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash 238446979, now seen corresponding path program 88 times [2022-04-06 19:32:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884333467] [2022-04-06 19:32:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:04,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:05,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 2 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:05,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:05,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884333467] [2022-04-06 19:32:05,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884333467] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:05,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909804502] [2022-04-06 19:32:05,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:32:05,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:05,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:05,937 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) [2022-04-06 19:32:05,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 19:32:06,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:32:06,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:06,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:32:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 1807 trivial. 0 not checked. [2022-04-06 19:32:06,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 1807 trivial. 0 not checked. [2022-04-06 19:32:06,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909804502] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:06,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:06,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 6, 6] total 56 [2022-04-06 19:32:06,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:06,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [998066049] [2022-04-06 19:32:06,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [998066049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:06,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:06,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 19:32:06,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976572985] [2022-04-06 19:32:06,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:06,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 19:32:06,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:06,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 19:32:06,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2903, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 19:32:06,826 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:08,791 INFO L93 Difference]: Finished difference Result 206 states and 211 transitions. [2022-04-06 19:32:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 19:32:08,791 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 19:32:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:08,792 INFO L225 Difference]: With dead ends: 206 [2022-04-06 19:32:08,792 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 19:32:08,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=3010, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:32:08,793 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 4149 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 4196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 4149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:08,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 346 Invalid, 4196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 4149 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 19:32:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 19:32:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-04-06 19:32:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2022-04-06 19:32:08,798 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2022-04-06 19:32:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:08,799 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2022-04-06 19:32:08,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2022-04-06 19:32:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 19:32:08,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:08,799 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:08,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:09,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 19:32:09,009 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:09,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:09,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2079181919, now seen corresponding path program 89 times [2022-04-06 19:32:09,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:09,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1225162363] [2022-04-06 19:32:17,046 WARN L232 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 836 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:32:17,132 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:17,132 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:17,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:17,183 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2079181919, now seen corresponding path program 90 times [2022-04-06 19:32:17,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:17,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715524250] [2022-04-06 19:32:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:17,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:18,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 2 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:18,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715524250] [2022-04-06 19:32:18,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715524250] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255190732] [2022-04-06 19:32:18,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:32:18,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:18,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:18,321 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) [2022-04-06 19:32:18,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 19:32:18,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:32:18,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:18,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:32:18,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2022-04-06 19:32:18,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2022-04-06 19:32:19,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255190732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:19,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:19,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 53 [2022-04-06 19:32:19,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:19,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1225162363] [2022-04-06 19:32:19,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1225162363] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:19,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:19,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 19:32:19,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058043516] [2022-04-06 19:32:19,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:19,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 19:32:19,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 19:32:19,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 19:32:19,002 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:21,099 INFO L93 Difference]: Finished difference Result 210 states and 215 transitions. [2022-04-06 19:32:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 19:32:21,099 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-04-06 19:32:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:21,100 INFO L225 Difference]: With dead ends: 210 [2022-04-06 19:32:21,100 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 19:32:21,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 19:32:21,100 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 4326 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 4374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:21,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 336 Invalid, 4374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 4326 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 19:32:21,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 19:32:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2022-04-06 19:32:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-04-06 19:32:21,106 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2022-04-06 19:32:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:21,106 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-04-06 19:32:21,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-04-06 19:32:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 19:32:21,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:21,107 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:21,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:21,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 19:32:21,323 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash -232526273, now seen corresponding path program 91 times [2022-04-06 19:32:21,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:21,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308159121] [2022-04-06 19:32:38,084 WARN L232 SmtUtils]: Spent 16.76s on a formula simplification. DAG size of input: 854 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:32:38,169 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:38,169 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:38,218 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:38,218 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:38,218 INFO L85 PathProgramCache]: Analyzing trace with hash -232526273, now seen corresponding path program 92 times [2022-04-06 19:32:38,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:38,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475545573] [2022-04-06 19:32:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:38,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:39,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2118 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:39,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475545573] [2022-04-06 19:32:39,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475545573] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:39,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849063207] [2022-04-06 19:32:39,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:32:39,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:39,377 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) [2022-04-06 19:32:39,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 19:32:39,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:32:39,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:39,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:32:39,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2118 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2022-04-06 19:32:39,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2118 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2022-04-06 19:32:40,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849063207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:40,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:40,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 6, 6] total 58 [2022-04-06 19:32:40,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:40,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308159121] [2022-04-06 19:32:40,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308159121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:40,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:40,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 19:32:40,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563520006] [2022-04-06 19:32:40,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:40,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 19:32:40,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 19:32:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3123, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:32:40,292 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:42,502 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2022-04-06 19:32:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 19:32:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 19:32:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:42,505 INFO L225 Difference]: With dead ends: 214 [2022-04-06 19:32:42,506 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 19:32:42,506 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=188, Invalid=3234, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 19:32:42,506 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 4567 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 4616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:42,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 476 Invalid, 4616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4567 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 19:32:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 19:32:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2022-04-06 19:32:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-04-06 19:32:42,516 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2022-04-06 19:32:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:42,516 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-04-06 19:32:42,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-04-06 19:32:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 19:32:42,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:42,519 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:42,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:42,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:42,727 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash 582056285, now seen corresponding path program 93 times [2022-04-06 19:32:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:42,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [849751836] [2022-04-06 19:32:53,274 WARN L232 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 872 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:32:53,357 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:53,357 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:53,416 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:53,416 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash 582056285, now seen corresponding path program 94 times [2022-04-06 19:32:53,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151784175] [2022-04-06 19:32:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:54,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:54,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:54,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151784175] [2022-04-06 19:32:54,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151784175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:54,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859845922] [2022-04-06 19:32:54,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:32:54,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:54,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:54,595 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) [2022-04-06 19:32:54,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 19:32:54,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:32:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:54,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:32:54,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 2071 trivial. 0 not checked. [2022-04-06 19:32:55,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 2071 trivial. 0 not checked. [2022-04-06 19:32:55,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859845922] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:55,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:55,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 6, 6] total 59 [2022-04-06 19:32:55,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:55,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [849751836] [2022-04-06 19:32:55,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [849751836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:55,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:55,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 19:32:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353897112] [2022-04-06 19:32:55,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:55,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 19:32:55,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 19:32:55,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3236, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 19:32:55,553 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:57,796 INFO L93 Difference]: Finished difference Result 218 states and 223 transitions. [2022-04-06 19:32:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 19:32:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 19:32:57,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:57,797 INFO L225 Difference]: With dead ends: 218 [2022-04-06 19:32:57,797 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 19:32:57,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=3349, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:32:57,797 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4660 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 4710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:57,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 236 Invalid, 4710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4660 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 19:32:57,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 19:32:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2022-04-06 19:32:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-04-06 19:32:57,803 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2022-04-06 19:32:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:57,803 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-04-06 19:32:57,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-04-06 19:32:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 19:32:57,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:57,804 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:57,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:58,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:58,020 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:58,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1711846651, now seen corresponding path program 95 times [2022-04-06 19:32:58,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:58,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [570740112] [2022-04-06 19:33:05,192 WARN L232 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 890 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:33:05,280 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:05,280 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:05,326 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:05,326 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1711846651, now seen corresponding path program 96 times [2022-04-06 19:33:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:05,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427790246] [2022-04-06 19:33:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:05,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:06,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2306 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:33:06,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:06,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427790246] [2022-04-06 19:33:06,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427790246] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:06,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152784087] [2022-04-06 19:33:06,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:33:06,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:06,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:06,571 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) [2022-04-06 19:33:06,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 19:33:06,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:33:06,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:06,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:33:06,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2306 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2305 trivial. 0 not checked. [2022-04-06 19:33:07,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2306 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2305 trivial. 0 not checked. [2022-04-06 19:33:07,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152784087] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:07,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:07,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 4, 4] total 56 [2022-04-06 19:33:07,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:07,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [570740112] [2022-04-06 19:33:07,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [570740112] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:07,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:07,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 19:33:07,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993021793] [2022-04-06 19:33:07,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:07,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 19:33:07,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:07,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 19:33:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 19:33:07,294 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:09,608 INFO L93 Difference]: Finished difference Result 222 states and 227 transitions. [2022-04-06 19:33:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 19:33:09,608 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-04-06 19:33:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:09,609 INFO L225 Difference]: With dead ends: 222 [2022-04-06 19:33:09,609 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 19:33:09,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:33:09,610 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 4777 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 4828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:09,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 46 Invalid, 4828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 4777 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 19:33:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 19:33:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-04-06 19:33:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2022-04-06 19:33:09,616 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2022-04-06 19:33:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:09,616 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2022-04-06 19:33:09,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2022-04-06 19:33:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 19:33:09,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:09,616 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:09,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:09,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:09,832 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 813662489, now seen corresponding path program 97 times [2022-04-06 19:33:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:09,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635722120] [2022-04-06 19:33:12,167 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:12,167 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:12,222 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:12,222 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:12,222 INFO L85 PathProgramCache]: Analyzing trace with hash 813662489, now seen corresponding path program 98 times [2022-04-06 19:33:12,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:12,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167830210] [2022-04-06 19:33:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:12,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:13,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 2 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:33:13,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:13,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167830210] [2022-04-06 19:33:13,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167830210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:13,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222129761] [2022-04-06 19:33:13,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:13,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:13,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:13,504 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) [2022-04-06 19:33:13,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 19:33:13,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:13,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:13,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:33:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2022-04-06 19:33:14,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2022-04-06 19:33:14,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222129761] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:14,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:14,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 6, 6] total 61 [2022-04-06 19:33:14,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:14,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635722120] [2022-04-06 19:33:14,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635722120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:14,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:14,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 19:33:14,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444967418] [2022-04-06 19:33:14,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:14,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 19:33:14,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 19:33:14,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3468, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 19:33:14,476 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:17,010 INFO L93 Difference]: Finished difference Result 226 states and 231 transitions. [2022-04-06 19:33:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 19:33:17,011 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 19:33:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:17,012 INFO L225 Difference]: With dead ends: 226 [2022-04-06 19:33:17,012 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 19:33:17,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=197, Invalid=3585, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:33:17,012 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 5154 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 5206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:17,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 496 Invalid, 5206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5154 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 19:33:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 19:33:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-04-06 19:33:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-04-06 19:33:17,018 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2022-04-06 19:33:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:17,019 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-04-06 19:33:17,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-04-06 19:33:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 19:33:17,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:17,019 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:17,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:17,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-06 19:33:17,231 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 947109303, now seen corresponding path program 99 times [2022-04-06 19:33:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:17,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472911850] [2022-04-06 19:33:28,746 WARN L232 SmtUtils]: Spent 11.51s on a formula simplification. DAG size of input: 926 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:33:28,834 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:28,834 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:28,902 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:28,902 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash 947109303, now seen corresponding path program 100 times [2022-04-06 19:33:28,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:28,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084416532] [2022-04-06 19:33:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:28,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:33:30,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:30,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084416532] [2022-04-06 19:33:30,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084416532] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:30,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042721488] [2022-04-06 19:33:30,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:33:30,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:30,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:30,229 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) [2022-04-06 19:33:30,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 19:33:30,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:33:30,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:30,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:33:30,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 2353 trivial. 0 not checked. [2022-04-06 19:33:30,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 2353 trivial. 0 not checked. [2022-04-06 19:33:31,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042721488] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:31,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:31,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 6, 6] total 62 [2022-04-06 19:33:31,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:31,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472911850] [2022-04-06 19:33:31,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472911850] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:31,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:31,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 19:33:31,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277471649] [2022-04-06 19:33:31,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:31,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 19:33:31,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:31,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 19:33:31,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3587, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:33:31,246 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:33,861 INFO L93 Difference]: Finished difference Result 230 states and 235 transitions. [2022-04-06 19:33:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 19:33:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-04-06 19:33:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:33,867 INFO L225 Difference]: With dead ends: 230 [2022-04-06 19:33:33,867 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 19:33:33,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=200, Invalid=3706, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 19:33:33,870 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5215 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 5215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:33,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 146 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 5215 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 19:33:33,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 19:33:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-04-06 19:33:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-04-06 19:33:33,880 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2022-04-06 19:33:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:33,880 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-04-06 19:33:33,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-04-06 19:33:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 19:33:33,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:33,881 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:33,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:34,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 19:33:34,091 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:34,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:34,092 INFO L85 PathProgramCache]: Analyzing trace with hash 340478677, now seen corresponding path program 101 times [2022-04-06 19:33:34,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:34,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583571837] [2022-04-06 19:33:54,592 WARN L232 SmtUtils]: Spent 20.50s on a formula simplification. DAG size of input: 944 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:33:54,680 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:54,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:54,770 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:54,770 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:54,770 INFO L85 PathProgramCache]: Analyzing trace with hash 340478677, now seen corresponding path program 102 times [2022-04-06 19:33:54,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:54,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839702892] [2022-04-06 19:33:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:54,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:56,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2603 backedges. 2 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:33:56,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:56,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839702892] [2022-04-06 19:33:56,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839702892] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:56,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308226450] [2022-04-06 19:33:56,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:33:56,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:56,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:56,166 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) [2022-04-06 19:33:56,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 19:33:56,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:33:56,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:33:56,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2603 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2602 trivial. 0 not checked. [2022-04-06 19:33:56,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2603 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2602 trivial. 0 not checked. [2022-04-06 19:33:56,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308226450] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:56,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:56,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 4, 4] total 59 [2022-04-06 19:33:56,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:56,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583571837] [2022-04-06 19:33:56,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583571837] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:56,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:56,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 19:33:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817317652] [2022-04-06 19:33:56,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:56,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 19:33:56,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:56,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 19:33:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 19:33:56,944 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:59,706 INFO L93 Difference]: Finished difference Result 234 states and 239 transitions. [2022-04-06 19:33:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 19:33:59,707 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-04-06 19:33:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:59,707 INFO L225 Difference]: With dead ends: 234 [2022-04-06 19:33:59,707 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 19:33:59,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:33:59,708 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 5548 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 5602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 5548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:59,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 466 Invalid, 5602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 5548 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 19:33:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 19:33:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-04-06 19:33:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-04-06 19:33:59,714 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2022-04-06 19:33:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:59,714 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-04-06 19:33:59,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-04-06 19:33:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 19:33:59,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:59,715 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:59,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:59,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:59,932 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1483999347, now seen corresponding path program 103 times [2022-04-06 19:33:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:59,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1121399189] [2022-04-06 19:34:02,984 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:02,984 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:03,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:03,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1483999347, now seen corresponding path program 104 times [2022-04-06 19:34:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:03,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776978263] [2022-04-06 19:34:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:03,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:04,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 2 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:34:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:04,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776978263] [2022-04-06 19:34:04,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776978263] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:04,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837883833] [2022-04-06 19:34:04,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:04,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:04,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:04,540 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) [2022-04-06 19:34:04,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 19:34:04,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:04,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:34:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 2551 trivial. 0 not checked. [2022-04-06 19:34:05,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 2551 trivial. 0 not checked. [2022-04-06 19:34:05,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837883833] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:05,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:05,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 6, 6] total 64 [2022-04-06 19:34:05,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:05,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1121399189] [2022-04-06 19:34:05,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1121399189] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:05,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:05,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 19:34:05,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451136546] [2022-04-06 19:34:05,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:05,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 19:34:05,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 19:34:05,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3831, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:34:05,625 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:08,474 INFO L93 Difference]: Finished difference Result 238 states and 243 transitions. [2022-04-06 19:34:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 19:34:08,474 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-04-06 19:34:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:08,474 INFO L225 Difference]: With dead ends: 238 [2022-04-06 19:34:08,474 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 19:34:08,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=206, Invalid=3954, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 19:34:08,475 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5633 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 5688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:08,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 156 Invalid, 5688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5633 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 19:34:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 19:34:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-04-06 19:34:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2022-04-06 19:34:08,484 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2022-04-06 19:34:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:08,484 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2022-04-06 19:34:08,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2022-04-06 19:34:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 19:34:08,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:08,485 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:08,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 19:34:08,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-06 19:34:08,685 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash 895735441, now seen corresponding path program 105 times [2022-04-06 19:34:08,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:08,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [723385718] [2022-04-06 19:34:11,356 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:11,356 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:11,435 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:11,435 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 895735441, now seen corresponding path program 106 times [2022-04-06 19:34:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:11,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594978876] [2022-04-06 19:34:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:11,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:12,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2811 backedges. 2 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:34:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:12,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594978876] [2022-04-06 19:34:12,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594978876] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:12,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892091206] [2022-04-06 19:34:12,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:12,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:12,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:12,927 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) [2022-04-06 19:34:12,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 19:34:13,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:13,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:13,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:34:13,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2811 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2653 trivial. 0 not checked. [2022-04-06 19:34:13,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2811 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 2653 trivial. 0 not checked. [2022-04-06 19:34:14,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892091206] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:14,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:14,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 6, 6] total 65 [2022-04-06 19:34:14,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:14,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [723385718] [2022-04-06 19:34:14,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [723385718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:14,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:14,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 19:34:14,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410568897] [2022-04-06 19:34:14,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:14,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 19:34:14,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:14,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 19:34:14,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3956, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 19:34:14,012 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:16,987 INFO L93 Difference]: Finished difference Result 242 states and 247 transitions. [2022-04-06 19:34:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 19:34:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-04-06 19:34:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:16,988 INFO L225 Difference]: With dead ends: 242 [2022-04-06 19:34:16,988 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 19:34:16,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=209, Invalid=4081, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:34:16,988 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 5950 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 6006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 5950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:16,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 416 Invalid, 6006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 5950 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 19:34:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 19:34:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-04-06 19:34:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-04-06 19:34:16,994 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 121 [2022-04-06 19:34:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:16,994 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-04-06 19:34:16,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-04-06 19:34:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 19:34:16,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:16,995 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:17,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:17,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-04-06 19:34:17,196 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1785162449, now seen corresponding path program 107 times [2022-04-06 19:34:17,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:17,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1379425504] [2022-04-06 19:34:35,084 WARN L232 SmtUtils]: Spent 17.88s on a formula simplification. DAG size of input: 998 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:34:35,172 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:35,172 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:35,238 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:35,238 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:35,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1785162449, now seen corresponding path program 108 times [2022-04-06 19:34:35,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:35,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326067549] [2022-04-06 19:34:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:35,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:36,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 2 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:34:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:36,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326067549] [2022-04-06 19:34:36,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326067549] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:36,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142862606] [2022-04-06 19:34:36,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:36,781 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) [2022-04-06 19:34:36,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 19:34:37,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:37,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:37,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:34:37,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2917 trivial. 0 not checked. [2022-04-06 19:34:37,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2917 trivial. 0 not checked. [2022-04-06 19:34:37,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142862606] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:37,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:37,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 4, 4] total 62 [2022-04-06 19:34:37,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:37,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1379425504] [2022-04-06 19:34:37,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1379425504] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:37,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:37,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 19:34:37,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775308368] [2022-04-06 19:34:37,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:37,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 19:34:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:37,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 19:34:37,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:34:37,629 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:40,715 INFO L93 Difference]: Finished difference Result 246 states and 251 transitions. [2022-04-06 19:34:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 19:34:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-04-06 19:34:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:40,716 INFO L225 Difference]: With dead ends: 246 [2022-04-06 19:34:40,716 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 19:34:40,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 19:34:40,717 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 6063 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 6120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 6063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:40,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 156 Invalid, 6120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 6063 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 19:34:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 19:34:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2022-04-06 19:34:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2022-04-06 19:34:40,723 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 123 [2022-04-06 19:34:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:40,723 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2022-04-06 19:34:40,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2022-04-06 19:34:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 19:34:40,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:40,724 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:40,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:40,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:40,939 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1147657139, now seen corresponding path program 109 times [2022-04-06 19:34:40,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:40,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [189603392] [2022-04-06 19:34:53,254 WARN L232 SmtUtils]: Spent 12.31s on a formula simplification. DAG size of input: 1016 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:34:53,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:53,346 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:53,411 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:53,411 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:53,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1147657139, now seen corresponding path program 110 times [2022-04-06 19:34:53,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:53,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667345881] [2022-04-06 19:34:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:53,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:55,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 2 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:34:55,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:55,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667345881] [2022-04-06 19:34:55,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667345881] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:55,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971919896] [2022-04-06 19:34:55,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:55,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:55,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:55,047 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) [2022-04-06 19:34:55,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 19:34:55,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:55,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:55,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:34:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 2863 trivial. 0 not checked. [2022-04-06 19:34:55,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 2863 trivial. 0 not checked. [2022-04-06 19:34:56,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971919896] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:56,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:56,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 6, 6] total 67 [2022-04-06 19:34:56,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:56,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [189603392] [2022-04-06 19:34:56,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [189603392] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:56,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:56,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 19:34:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309531585] [2022-04-06 19:34:56,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:56,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 19:34:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 19:34:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=4212, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 19:34:56,197 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:59,416 INFO L93 Difference]: Finished difference Result 250 states and 255 transitions. [2022-04-06 19:34:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 19:34:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-04-06 19:34:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:59,417 INFO L225 Difference]: With dead ends: 250 [2022-04-06 19:34:59,417 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 19:34:59,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=215, Invalid=4341, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 19:34:59,418 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6308 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 6366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 6308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:59,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 216 Invalid, 6366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 6308 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 19:34:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 19:34:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-04-06 19:34:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-04-06 19:34:59,424 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2022-04-06 19:34:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:59,424 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-04-06 19:34:59,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-04-06 19:34:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 19:34:59,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:59,425 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:59,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:59,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:59,643 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:59,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1609589739, now seen corresponding path program 111 times [2022-04-06 19:34:59,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:59,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263479677] [2022-04-06 19:35:03,067 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:03,067 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:03,152 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:03,152 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:03,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1609589739, now seen corresponding path program 112 times [2022-04-06 19:35:03,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:03,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846465866] [2022-04-06 19:35:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:03,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:04,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3138 backedges. 2 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:35:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846465866] [2022-04-06 19:35:04,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846465866] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260093282] [2022-04-06 19:35:04,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:04,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:04,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:04,840 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) [2022-04-06 19:35:04,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 19:35:05,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:05,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:05,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:35:05,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3138 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 2971 trivial. 0 not checked. [2022-04-06 19:35:05,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3138 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 2971 trivial. 0 not checked. [2022-04-06 19:35:06,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260093282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:06,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:06,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 6, 6] total 68 [2022-04-06 19:35:06,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:06,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263479677] [2022-04-06 19:35:06,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263479677] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:06,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:06,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 19:35:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898369785] [2022-04-06 19:35:06,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:06,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 19:35:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 19:35:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=4343, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 19:35:06,006 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:09,389 INFO L93 Difference]: Finished difference Result 254 states and 259 transitions. [2022-04-06 19:35:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 19:35:09,389 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-04-06 19:35:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:09,390 INFO L225 Difference]: With dead ends: 254 [2022-04-06 19:35:09,390 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 19:35:09,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=218, Invalid=4474, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:35:09,390 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 6521 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 6580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 6521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:09,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 186 Invalid, 6580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 6521 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 19:35:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 19:35:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2022-04-06 19:35:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-04-06 19:35:09,397 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 127 [2022-04-06 19:35:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:09,397 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-04-06 19:35:09,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-04-06 19:35:09,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 19:35:09,397 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:09,397 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:09,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:09,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 19:35:09,598 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:09,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1329017865, now seen corresponding path program 113 times [2022-04-06 19:35:09,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:09,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [510436499] [2022-04-06 19:35:22,124 WARN L232 SmtUtils]: Spent 12.52s on a formula simplification. DAG size of input: 1052 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:35:22,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:22,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:22,318 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:22,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1329017865, now seen corresponding path program 114 times [2022-04-06 19:35:22,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:22,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864789315] [2022-04-06 19:35:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:22,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:24,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 2 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:35:24,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:24,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864789315] [2022-04-06 19:35:24,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864789315] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:24,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164082069] [2022-04-06 19:35:24,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:35:24,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:24,149 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) [2022-04-06 19:35:24,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 19:35:24,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:35:24,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:24,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:35:24,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3250 trivial. 0 not checked. [2022-04-06 19:35:24,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3250 trivial. 0 not checked. [2022-04-06 19:35:25,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164082069] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:25,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:25,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 4, 4] total 65 [2022-04-06 19:35:25,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:25,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [510436499] [2022-04-06 19:35:25,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [510436499] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:25,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:25,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 19:35:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888513462] [2022-04-06 19:35:25,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:25,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 19:35:25,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 19:35:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 19:35:25,122 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:28,948 INFO L93 Difference]: Finished difference Result 258 states and 263 transitions. [2022-04-06 19:35:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 19:35:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-04-06 19:35:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:28,949 INFO L225 Difference]: With dead ends: 258 [2022-04-06 19:35:28,949 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 19:35:28,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:35:28,949 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 6902 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 6962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 6902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:28,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 566 Invalid, 6962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 6902 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 19:35:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 19:35:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2022-04-06 19:35:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-04-06 19:35:28,956 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 129 [2022-04-06 19:35:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:28,956 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-04-06 19:35:28,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-04-06 19:35:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 19:35:28,957 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:28,957 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:28,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:29,158 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:29,158 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2012580697, now seen corresponding path program 115 times [2022-04-06 19:35:29,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:29,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [481987148] [2022-04-06 19:35:33,078 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:33,078 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:33,210 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:33,210 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:33,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2012580697, now seen corresponding path program 116 times [2022-04-06 19:35:33,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:33,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077318437] [2022-04-06 19:35:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:33,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:35,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 2 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:35:35,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:35,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077318437] [2022-04-06 19:35:35,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077318437] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:35,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056259084] [2022-04-06 19:35:35,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:35:35,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:35,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:35,018 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) [2022-04-06 19:35:35,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 19:35:35,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:35,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:35,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:35:35,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 3193 trivial. 0 not checked. [2022-04-06 19:35:35,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 3193 trivial. 0 not checked. [2022-04-06 19:35:36,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056259084] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:36,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:36,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 6, 6] total 70 [2022-04-06 19:35:36,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:36,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [481987148] [2022-04-06 19:35:36,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [481987148] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:36,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:36,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 19:35:36,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798364273] [2022-04-06 19:35:36,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:36,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 19:35:36,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:36,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 19:35:36,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4611, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 19:35:36,216 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:39,882 INFO L93 Difference]: Finished difference Result 262 states and 267 transitions. [2022-04-06 19:35:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 19:35:39,886 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-04-06 19:35:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:39,886 INFO L225 Difference]: With dead ends: 262 [2022-04-06 19:35:39,886 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 19:35:39,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=224, Invalid=4746, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 19:35:39,887 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 7043 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 7104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 7043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:39,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 336 Invalid, 7104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 7043 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 19:35:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 19:35:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-04-06 19:35:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-04-06 19:35:39,913 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 131 [2022-04-06 19:35:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:39,913 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-04-06 19:35:39,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-04-06 19:35:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 19:35:39,914 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:39,914 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:39,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:40,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 19:35:40,127 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:40,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -653261371, now seen corresponding path program 117 times [2022-04-06 19:35:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:40,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [315442661] [2022-04-06 19:35:47,695 WARN L232 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 1088 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:35:47,789 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:47,789 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:47,876 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:47,876 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash -653261371, now seen corresponding path program 118 times [2022-04-06 19:35:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67614412] [2022-04-06 19:35:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:47,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 2 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:35:49,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:49,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67614412] [2022-04-06 19:35:49,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67614412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:49,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167718718] [2022-04-06 19:35:49,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:49,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:49,767 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) [2022-04-06 19:35:49,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 19:35:50,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:50,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:35:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 3307 trivial. 0 not checked. [2022-04-06 19:35:50,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 174 proven. 2 refuted. 0 times theorem prover too weak. 3307 trivial. 0 not checked. [2022-04-06 19:35:51,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167718718] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:51,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:51,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 6, 6] total 71 [2022-04-06 19:35:51,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:51,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [315442661] [2022-04-06 19:35:51,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [315442661] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:51,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:51,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 19:35:51,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365500965] [2022-04-06 19:35:51,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:51,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 19:35:51,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:51,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 19:35:51,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4748, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 19:35:51,015 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:54,907 INFO L93 Difference]: Finished difference Result 266 states and 271 transitions. [2022-04-06 19:35:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 19:35:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-04-06 19:35:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:54,908 INFO L225 Difference]: With dead ends: 266 [2022-04-06 19:35:54,908 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 19:35:54,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=227, Invalid=4885, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 19:35:54,913 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 7348 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 7410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 7348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:54,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 506 Invalid, 7410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 7348 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 19:35:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 19:35:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-04-06 19:35:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-04-06 19:35:54,921 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 133 [2022-04-06 19:35:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:54,921 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-04-06 19:35:54,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-04-06 19:35:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 19:35:54,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:54,921 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:54,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:55,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-04-06 19:35:55,122 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash -17447069, now seen corresponding path program 119 times [2022-04-06 19:35:55,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1239044154] [2022-04-06 19:36:06,567 WARN L232 SmtUtils]: Spent 11.44s on a formula simplification. DAG size of input: 1106 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:36:06,664 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:06,664 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:06,764 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:06,764 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:06,764 INFO L85 PathProgramCache]: Analyzing trace with hash -17447069, now seen corresponding path program 120 times [2022-04-06 19:36:06,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:06,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532879645] [2022-04-06 19:36:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:06,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:08,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 2 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:36:08,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:08,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532879645] [2022-04-06 19:36:08,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532879645] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:08,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390901813] [2022-04-06 19:36:08,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:36:08,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:08,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:08,732 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) [2022-04-06 19:36:08,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 19:36:09,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:36:09,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:09,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:36:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3601 trivial. 0 not checked. [2022-04-06 19:36:09,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3601 trivial. 0 not checked. [2022-04-06 19:36:09,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390901813] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:09,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:09,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 4, 4] total 68 [2022-04-06 19:36:09,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1239044154] [2022-04-06 19:36:09,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1239044154] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:09,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:09,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 19:36:09,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961679959] [2022-04-06 19:36:09,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:09,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 19:36:09,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:09,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 19:36:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 19:36:09,675 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:13,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:13,730 INFO L93 Difference]: Finished difference Result 270 states and 275 transitions. [2022-04-06 19:36:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 19:36:13,730 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-04-06 19:36:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:13,731 INFO L225 Difference]: With dead ends: 270 [2022-04-06 19:36:13,731 INFO L226 Difference]: Without dead ends: 141 [2022-04-06 19:36:13,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:36:13,732 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 7445 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 7508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 7445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:13,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 146 Invalid, 7508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 7445 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 19:36:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-04-06 19:36:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2022-04-06 19:36:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2022-04-06 19:36:13,739 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 135 [2022-04-06 19:36:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:13,739 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2022-04-06 19:36:13,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2022-04-06 19:36:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 19:36:13,739 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:13,739 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:13,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 19:36:13,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:13,940 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:13,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1114741121, now seen corresponding path program 121 times [2022-04-06 19:36:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:13,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2112016997] [2022-04-06 19:36:17,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:17,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:17,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:17,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1114741121, now seen corresponding path program 122 times [2022-04-06 19:36:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:17,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874920326] [2022-04-06 19:36:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:17,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 2 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:36:19,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:19,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874920326] [2022-04-06 19:36:19,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874920326] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:19,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116990508] [2022-04-06 19:36:19,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:36:19,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:19,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:19,637 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) [2022-04-06 19:36:19,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 19:36:19,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:36:19,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:36:19,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 3541 trivial. 0 not checked. [2022-04-06 19:36:20,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 3541 trivial. 0 not checked. [2022-04-06 19:36:20,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116990508] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:20,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:20,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 6, 6] total 73 [2022-04-06 19:36:20,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2112016997] [2022-04-06 19:36:20,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2112016997] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:20,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:20,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 19:36:20,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034385940] [2022-04-06 19:36:20,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:20,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 19:36:20,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 19:36:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5028, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 19:36:20,940 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:25,120 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2022-04-06 19:36:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 19:36:25,120 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-04-06 19:36:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:25,121 INFO L225 Difference]: With dead ends: 274 [2022-04-06 19:36:25,121 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 19:36:25,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=233, Invalid=5169, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 19:36:25,122 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7718 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 7782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 7718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:25,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 216 Invalid, 7782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 7718 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 19:36:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 19:36:25,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2022-04-06 19:36:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-04-06 19:36:25,128 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2022-04-06 19:36:25,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:25,129 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-04-06 19:36:25,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-04-06 19:36:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 19:36:25,129 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:25,129 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:25,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:25,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:25,330 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:25,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101473, now seen corresponding path program 123 times [2022-04-06 19:36:25,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:25,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1972138679] [2022-04-06 19:36:49,108 WARN L232 SmtUtils]: Spent 23.77s on a formula simplification. DAG size of input: 1142 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:36:49,207 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:49,207 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:49,343 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:49,343 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:49,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101473, now seen corresponding path program 124 times [2022-04-06 19:36:49,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:49,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249419143] [2022-04-06 19:36:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:49,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:51,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3846 backedges. 2 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:36:51,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249419143] [2022-04-06 19:36:51,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249419143] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57711835] [2022-04-06 19:36:51,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:36:51,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:51,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:51,465 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) [2022-04-06 19:36:51,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 19:36:51,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:36:51,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:51,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:36:51,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3846 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 3661 trivial. 0 not checked. [2022-04-06 19:36:52,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3846 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 3661 trivial. 0 not checked. [2022-04-06 19:36:52,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57711835] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:52,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:52,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 6, 6] total 74 [2022-04-06 19:36:52,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:52,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1972138679] [2022-04-06 19:36:52,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1972138679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:52,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:52,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 19:36:52,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771365972] [2022-04-06 19:36:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:52,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 19:36:52,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 19:36:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5171, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 19:36:52,796 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:57,206 INFO L93 Difference]: Finished difference Result 278 states and 283 transitions. [2022-04-06 19:36:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 19:36:57,207 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-04-06 19:36:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:57,207 INFO L225 Difference]: With dead ends: 278 [2022-04-06 19:36:57,207 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 19:36:57,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=236, Invalid=5314, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 19:36:57,208 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7895 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 7895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:57,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 36 Invalid, 7960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 7895 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 19:36:57,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 19:36:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2022-04-06 19:36:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-04-06 19:36:57,215 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 139 [2022-04-06 19:36:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:57,215 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-04-06 19:36:57,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-04-06 19:36:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 19:36:57,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:57,216 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:57,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:57,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-04-06 19:36:57,427 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 892006205, now seen corresponding path program 125 times [2022-04-06 19:36:57,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:57,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1763145066] [2022-04-06 19:37:42,233 WARN L232 SmtUtils]: Spent 44.80s on a formula simplification. DAG size of input: 1160 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:37:42,330 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:42,330 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:42,455 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:42,455 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash 892006205, now seen corresponding path program 126 times [2022-04-06 19:37:42,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:42,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174333715] [2022-04-06 19:37:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:42,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:44,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 2 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:37:44,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174333715] [2022-04-06 19:37:44,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174333715] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883644677] [2022-04-06 19:37:44,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:37:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:44,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:44,629 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) [2022-04-06 19:37:44,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 19:37:44,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:37:44,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:37:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3970 trivial. 0 not checked. [2022-04-06 19:37:45,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3970 trivial. 0 not checked. [2022-04-06 19:37:45,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883644677] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:45,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:45,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 4, 4] total 71 [2022-04-06 19:37:45,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:45,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1763145066] [2022-04-06 19:37:45,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1763145066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:45,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:45,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 19:37:45,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378692456] [2022-04-06 19:37:45,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:45,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 19:37:45,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:45,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 19:37:45,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 19:37:45,653 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:50,240 INFO L93 Difference]: Finished difference Result 282 states and 287 transitions. [2022-04-06 19:37:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 19:37:50,240 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-04-06 19:37:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:50,241 INFO L225 Difference]: With dead ends: 282 [2022-04-06 19:37:50,241 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 19:37:50,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 19:37:50,242 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 8324 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 8390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 8324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:50,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 476 Invalid, 8390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 8324 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 19:37:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 19:37:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2022-04-06 19:37:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2022-04-06 19:37:50,249 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 141 [2022-04-06 19:37:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:50,250 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2022-04-06 19:37:50,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2022-04-06 19:37:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 19:37:50,250 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:50,250 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:50,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:50,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 19:37:50,463 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:50,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1073990949, now seen corresponding path program 127 times [2022-04-06 19:37:50,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:50,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2461242] [2022-04-06 19:38:17,112 WARN L232 SmtUtils]: Spent 26.64s on a formula simplification. DAG size of input: 1178 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:38:17,214 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:17,214 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:17,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:17,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1073990949, now seen corresponding path program 128 times [2022-04-06 19:38:17,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:17,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298825321] [2022-04-06 19:38:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:17,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:19,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 2 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:38:19,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:19,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298825321] [2022-04-06 19:38:19,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298825321] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:19,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787804271] [2022-04-06 19:38:19,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:38:19,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:19,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:19,561 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) [2022-04-06 19:38:19,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 19:38:19,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:38:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:38:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 3907 trivial. 0 not checked. [2022-04-06 19:38:20,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 3907 trivial. 0 not checked. [2022-04-06 19:38:20,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787804271] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:20,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:20,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 6, 6] total 76 [2022-04-06 19:38:20,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2461242] [2022-04-06 19:38:20,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2461242] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:20,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:20,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 19:38:20,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325829775] [2022-04-06 19:38:20,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:20,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 19:38:20,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 19:38:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=5463, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 19:38:20,959 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:25,649 INFO L93 Difference]: Finished difference Result 286 states and 291 transitions. [2022-04-06 19:38:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 19:38:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-04-06 19:38:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:25,650 INFO L225 Difference]: With dead ends: 286 [2022-04-06 19:38:25,650 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 19:38:25,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=242, Invalid=5610, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 19:38:25,650 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 8465 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 8532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 8465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:25,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 186 Invalid, 8532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 8465 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-04-06 19:38:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 19:38:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2022-04-06 19:38:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2022-04-06 19:38:25,658 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 143 [2022-04-06 19:38:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:25,658 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2022-04-06 19:38:25,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2022-04-06 19:38:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 19:38:25,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:25,659 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:25,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 19:38:25,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:25,875 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:25,876 INFO L85 PathProgramCache]: Analyzing trace with hash -611645703, now seen corresponding path program 129 times [2022-04-06 19:38:25,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:25,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1066322454] [2022-04-06 19:38:33,826 WARN L232 SmtUtils]: Spent 7.94s on a formula simplification. DAG size of input: 1196 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:38:33,928 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:33,929 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:34,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:34,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash -611645703, now seen corresponding path program 130 times [2022-04-06 19:38:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:34,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660234827] [2022-04-06 19:38:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:34,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:36,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 2 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:38:36,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:36,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660234827] [2022-04-06 19:38:36,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660234827] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:36,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707833722] [2022-04-06 19:38:36,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:38:36,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:36,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:36,365 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) [2022-04-06 19:38:36,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 19:38:36,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:38:36,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:38:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 4033 trivial. 0 not checked. [2022-04-06 19:38:37,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 4033 trivial. 0 not checked. [2022-04-06 19:38:37,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707833722] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:37,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:37,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 6, 6] total 77 [2022-04-06 19:38:37,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:37,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1066322454] [2022-04-06 19:38:37,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1066322454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:37,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:37,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 19:38:37,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288525005] [2022-04-06 19:38:37,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:37,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 19:38:37,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:37,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 19:38:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=5612, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 19:38:37,806 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:42,741 INFO L93 Difference]: Finished difference Result 290 states and 295 transitions. [2022-04-06 19:38:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 19:38:42,741 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-04-06 19:38:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:42,742 INFO L225 Difference]: With dead ends: 290 [2022-04-06 19:38:42,742 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 19:38:42,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=245, Invalid=5761, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 19:38:42,743 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 8690 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 8758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 8690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:42,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 96 Invalid, 8758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 8690 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-04-06 19:38:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 19:38:42,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2022-04-06 19:38:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-04-06 19:38:42,750 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 145 [2022-04-06 19:38:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:42,750 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-04-06 19:38:42,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-04-06 19:38:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 19:38:42,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:42,751 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:42,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 19:38:42,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 19:38:42,970 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1320504215, now seen corresponding path program 131 times [2022-04-06 19:38:42,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:42,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725598698] [2022-04-06 19:38:46,234 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:46,235 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:46,330 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:46,331 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:46,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1320504215, now seen corresponding path program 132 times [2022-04-06 19:38:46,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:46,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258199065] [2022-04-06 19:38:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:46,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4358 backedges. 2 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:38:48,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:48,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258199065] [2022-04-06 19:38:48,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258199065] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:48,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281619825] [2022-04-06 19:38:48,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:38:48,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:48,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:48,746 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) [2022-04-06 19:38:48,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 19:38:49,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:38:49,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:49,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:38:49,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4358 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4357 trivial. 0 not checked. [2022-04-06 19:38:49,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4358 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4357 trivial. 0 not checked. [2022-04-06 19:38:49,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281619825] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:49,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:49,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 4, 4] total 74 [2022-04-06 19:38:49,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:49,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [725598698] [2022-04-06 19:38:49,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [725598698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:49,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:49,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 19:38:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98344374] [2022-04-06 19:38:49,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:49,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 19:38:49,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 19:38:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 19:38:49,851 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:55,014 INFO L93 Difference]: Finished difference Result 294 states and 299 transitions. [2022-04-06 19:38:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 19:38:55,014 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-04-06 19:38:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:55,015 INFO L225 Difference]: With dead ends: 294 [2022-04-06 19:38:55,015 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 19:38:55,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 19:38:55,016 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 8963 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 9032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 8963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:55,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 116 Invalid, 9032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 8963 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-04-06 19:38:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 19:38:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2022-04-06 19:38:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2022-04-06 19:38:55,030 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 147 [2022-04-06 19:38:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:55,031 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2022-04-06 19:38:55,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2022-04-06 19:38:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 19:38:55,031 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:55,032 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:55,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 19:38:55,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 19:38:55,249 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:55,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:55,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1604263755, now seen corresponding path program 133 times [2022-04-06 19:38:55,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:55,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [716043666] [2022-04-06 19:39:07,935 WARN L232 SmtUtils]: Spent 12.68s on a formula simplification. DAG size of input: 1232 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:39:08,035 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:08,035 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:08,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:08,125 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1604263755, now seen corresponding path program 134 times [2022-04-06 19:39:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:08,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820050578] [2022-04-06 19:39:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:10,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:39:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4491 backedges. 2 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:39:10,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:39:10,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820050578] [2022-04-06 19:39:10,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820050578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:39:10,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683245275] [2022-04-06 19:39:10,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:39:10,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:10,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:39:10,635 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) [2022-04-06 19:39:10,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 19:39:11,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:39:11,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:39:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:39:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:39:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4491 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-04-06 19:39:11,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:39:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4491 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-04-06 19:39:12,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683245275] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:39:12,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:39:12,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 6, 6] total 79 [2022-04-06 19:39:12,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:39:12,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [716043666] [2022-04-06 19:39:12,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [716043666] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:39:12,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:39:12,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 19:39:12,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470394216] [2022-04-06 19:39:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:39:12,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 19:39:12,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:12,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 19:39:12,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=5916, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 19:39:12,148 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:39:17,469 INFO L93 Difference]: Finished difference Result 298 states and 303 transitions. [2022-04-06 19:39:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 19:39:17,470 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-04-06 19:39:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:39:17,470 INFO L225 Difference]: With dead ends: 298 [2022-04-06 19:39:17,470 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 19:39:17,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=251, Invalid=6069, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 19:39:17,471 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9216 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 9286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 9216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:39:17,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 76 Invalid, 9286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 9216 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-04-06 19:39:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 19:39:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2022-04-06 19:39:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2022-04-06 19:39:17,478 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 149 [2022-04-06 19:39:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:39:17,479 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2022-04-06 19:39:17,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2022-04-06 19:39:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 19:39:17,479 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:39:17,479 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:39:17,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 19:39:17,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:17,694 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:39:17,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:39:17,694 INFO L85 PathProgramCache]: Analyzing trace with hash 897295955, now seen corresponding path program 135 times [2022-04-06 19:39:17,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:17,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1663850537] [2022-04-06 19:39:34,460 WARN L232 SmtUtils]: Spent 16.76s on a formula simplification. DAG size of input: 1250 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:39:34,562 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:34,562 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:34,672 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:34,672 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash 897295955, now seen corresponding path program 136 times [2022-04-06 19:39:34,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:34,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104246610] [2022-04-06 19:39:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:34,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:37,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:39:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4626 backedges. 2 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:39:37,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:39:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104246610] [2022-04-06 19:39:37,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104246610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:39:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390577113] [2022-04-06 19:39:37,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:39:37,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:37,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:39:37,247 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) [2022-04-06 19:39:37,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 19:39:37,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:39:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:39:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:39:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:39:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4626 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 4423 trivial. 0 not checked. [2022-04-06 19:39:38,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:39:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4626 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 4423 trivial. 0 not checked. [2022-04-06 19:39:38,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390577113] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:39:38,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:39:38,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 6, 6] total 80 [2022-04-06 19:39:38,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:39:38,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1663850537] [2022-04-06 19:39:38,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1663850537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:39:38,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:39:38,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 19:39:38,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809466348] [2022-04-06 19:39:38,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:39:38,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 19:39:38,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:38,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 19:39:38,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=6071, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 19:39:38,843 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:39:44,466 INFO L93 Difference]: Finished difference Result 302 states and 307 transitions. [2022-04-06 19:39:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 19:39:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-04-06 19:39:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:39:44,467 INFO L225 Difference]: With dead ends: 302 [2022-04-06 19:39:44,467 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 19:39:44,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=254, Invalid=6226, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 19:39:44,468 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 71 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 9685 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 9756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 9685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:39:44,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 566 Invalid, 9756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 9685 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-04-06 19:39:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 19:39:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-04-06 19:39:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2022-04-06 19:39:44,476 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 151 [2022-04-06 19:39:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:39:44,476 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2022-04-06 19:39:44,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2022-04-06 19:39:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 19:39:44,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:39:44,477 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:39:44,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 19:39:44,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-04-06 19:39:44,691 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:39:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:39:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -285508495, now seen corresponding path program 137 times [2022-04-06 19:39:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:44,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1129999420] [2022-04-06 19:39:57,320 WARN L232 SmtUtils]: Spent 12.62s on a formula simplification. DAG size of input: 1268 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:39:57,421 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:57,422 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:57,587 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:57,587 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:57,587 INFO L85 PathProgramCache]: Analyzing trace with hash -285508495, now seen corresponding path program 138 times [2022-04-06 19:39:57,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:57,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032162559] [2022-04-06 19:39:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:57,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4763 backedges. 2 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:40:00,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:00,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032162559] [2022-04-06 19:40:00,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032162559] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:00,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195123204] [2022-04-06 19:40:00,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:40:00,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:00,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:00,270 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) [2022-04-06 19:40:00,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 19:40:00,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:40:00,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:40:00,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4763 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4762 trivial. 0 not checked. [2022-04-06 19:40:01,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4763 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4762 trivial. 0 not checked. [2022-04-06 19:40:01,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195123204] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:01,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:01,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 4, 4] total 77 [2022-04-06 19:40:01,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:01,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1129999420] [2022-04-06 19:40:01,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1129999420] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:01,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:01,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 19:40:01,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304746650] [2022-04-06 19:40:01,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:01,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 19:40:01,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:01,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 19:40:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 19:40:01,434 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:07,110 INFO L93 Difference]: Finished difference Result 306 states and 311 transitions. [2022-04-06 19:40:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 19:40:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-04-06 19:40:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:07,111 INFO L225 Difference]: With dead ends: 306 [2022-04-06 19:40:07,111 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 19:40:07,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 19:40:07,111 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 9810 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 9882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 9810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:07,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 186 Invalid, 9882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 9810 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-04-06 19:40:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 19:40:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2022-04-06 19:40:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-04-06 19:40:07,119 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 153 [2022-04-06 19:40:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:07,119 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-04-06 19:40:07,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-04-06 19:40:07,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 19:40:07,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:07,120 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:07,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 19:40:07,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:07,321 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1205748495, now seen corresponding path program 139 times [2022-04-06 19:40:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:07,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1211782696] [2022-04-06 19:40:40,079 WARN L232 SmtUtils]: Spent 32.75s on a formula simplification. DAG size of input: 1286 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:40:40,188 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:40,188 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:40,308 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:40,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:40:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1205748495, now seen corresponding path program 140 times [2022-04-06 19:40:40,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:40:40,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644145852] [2022-04-06 19:40:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:40:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:40:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:43,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 2 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:40:43,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:43,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644145852] [2022-04-06 19:40:43,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644145852] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:43,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464519404] [2022-04-06 19:40:43,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:40:43,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:43,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:43,288 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) [2022-04-06 19:40:43,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 19:40:43,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:40:43,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:43,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:40:43,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 4693 trivial. 0 not checked. [2022-04-06 19:40:44,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 4693 trivial. 0 not checked. [2022-04-06 19:40:44,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464519404] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:44,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:44,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 6, 6] total 82 [2022-04-06 19:40:44,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:44,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1211782696] [2022-04-06 19:40:44,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1211782696] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:44,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:44,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 19:40:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721551312] [2022-04-06 19:40:44,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:44,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 19:40:44,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 19:40:44,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=6387, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 19:40:44,920 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:51,345 INFO L93 Difference]: Finished difference Result 310 states and 315 transitions. [2022-04-06 19:40:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 19:40:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-04-06 19:40:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:51,346 INFO L225 Difference]: With dead ends: 310 [2022-04-06 19:40:51,346 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 19:40:51,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=260, Invalid=6546, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 19:40:51,346 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 10095 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 10168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 10095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:51,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 196 Invalid, 10168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 10095 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-04-06 19:40:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 19:40:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2022-04-06 19:40:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2022-04-06 19:40:51,354 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2022-04-06 19:40:51,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:51,354 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2022-04-06 19:40:51,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:51,354 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2022-04-06 19:40:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 19:40:51,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:51,355 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:51,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 19:40:51,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:51,569 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:51,570 INFO L85 PathProgramCache]: Analyzing trace with hash -215360979, now seen corresponding path program 141 times [2022-04-06 19:40:51,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:51,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [65972008] [2022-04-06 19:41:03,161 WARN L232 SmtUtils]: Spent 11.58s on a formula simplification. DAG size of input: 1304 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:41:03,270 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:03,270 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:03,383 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:03,383 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:41:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash -215360979, now seen corresponding path program 142 times [2022-04-06 19:41:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:41:03,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855207789] [2022-04-06 19:41:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:41:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:41:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:06,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:41:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5043 backedges. 2 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:41:06,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:41:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855207789] [2022-04-06 19:41:06,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855207789] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:41:06,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382519231] [2022-04-06 19:41:06,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:41:06,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:06,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:41:06,425 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) [2022-04-06 19:41:06,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 19:41:06,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:41:06,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:41:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:41:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:41:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5043 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 4831 trivial. 0 not checked. [2022-04-06 19:41:07,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:41:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5043 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 4831 trivial. 0 not checked. [2022-04-06 19:41:08,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382519231] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:41:08,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:41:08,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 6, 6] total 83 [2022-04-06 19:41:08,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:41:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [65972008] [2022-04-06 19:41:08,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [65972008] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:41:08,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:41:08,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 19:41:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949706187] [2022-04-06 19:41:08,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:41:08,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 19:41:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 19:41:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=6548, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 19:41:08,102 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:41:14,912 INFO L93 Difference]: Finished difference Result 314 states and 319 transitions. [2022-04-06 19:41:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 19:41:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-04-06 19:41:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:41:14,913 INFO L225 Difference]: With dead ends: 314 [2022-04-06 19:41:14,913 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 19:41:14,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=263, Invalid=6709, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 19:41:14,914 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 10368 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 10442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 10368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:41:14,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 166 Invalid, 10442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 10368 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-04-06 19:41:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 19:41:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2022-04-06 19:41:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-04-06 19:41:14,922 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 157 [2022-04-06 19:41:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:41:14,922 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-04-06 19:41:14,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-04-06 19:41:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 19:41:14,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:41:14,923 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:41:14,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 19:41:15,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:15,135 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:41:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:41:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -101965365, now seen corresponding path program 143 times [2022-04-06 19:41:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:15,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [527387986] [2022-04-06 19:41:38,327 WARN L232 SmtUtils]: Spent 23.18s on a formula simplification. DAG size of input: 1322 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:41:38,442 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:38,442 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:38,541 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:38,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:41:38,541 INFO L85 PathProgramCache]: Analyzing trace with hash -101965365, now seen corresponding path program 144 times [2022-04-06 19:41:38,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:41:38,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255028380] [2022-04-06 19:41:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:41:38,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:41:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:41,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:41:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5186 backedges. 2 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:41:41,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:41:41,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255028380] [2022-04-06 19:41:41,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255028380] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:41:41,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317279839] [2022-04-06 19:41:41,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:41:41,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:41,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:41:41,724 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) [2022-04-06 19:41:41,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 19:41:42,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:41:42,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:41:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:41:42,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:41:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5186 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5185 trivial. 0 not checked. [2022-04-06 19:41:42,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:41:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5186 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5185 trivial. 0 not checked. [2022-04-06 19:41:42,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317279839] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:41:42,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:41:42,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 4, 4] total 80 [2022-04-06 19:41:42,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:41:42,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [527387986] [2022-04-06 19:41:42,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [527387986] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:41:42,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:41:42,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 19:41:42,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154280936] [2022-04-06 19:41:42,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:41:42,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 19:41:42,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:42,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 19:41:42,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 19:41:42,999 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:41:49,818 INFO L93 Difference]: Finished difference Result 318 states and 323 transitions. [2022-04-06 19:41:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 19:41:49,818 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-04-06 19:41:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:41:49,819 INFO L225 Difference]: With dead ends: 318 [2022-04-06 19:41:49,819 INFO L226 Difference]: Without dead ends: 165 [2022-04-06 19:41:49,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=238, Invalid=6242, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 19:41:49,820 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 10693 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 10768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 10693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:41:49,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 256 Invalid, 10768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 10693 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-04-06 19:41:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-04-06 19:41:49,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2022-04-06 19:41:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2022-04-06 19:41:49,828 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 159 [2022-04-06 19:41:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:41:49,828 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2022-04-06 19:41:49,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2022-04-06 19:41:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 19:41:49,829 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:41:49,829 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:41:49,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 19:41:50,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-04-06 19:41:50,047 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:41:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:41:50,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1497037289, now seen corresponding path program 145 times [2022-04-06 19:41:50,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:50,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1727284663] [2022-04-06 19:42:01,246 WARN L232 SmtUtils]: Spent 11.19s on a formula simplification. DAG size of input: 1340 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:42:01,354 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:01,354 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:01,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:01,469 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:42:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1497037289, now seen corresponding path program 146 times [2022-04-06 19:42:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:42:01,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236383261] [2022-04-06 19:42:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:42:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:42:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:04,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:42:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5331 backedges. 2 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:42:04,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:42:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236383261] [2022-04-06 19:42:04,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236383261] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:42:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361793747] [2022-04-06 19:42:04,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:42:04,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:42:04,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:42:04,671 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) [2022-04-06 19:42:04,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 19:42:05,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:42:05,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:42:05,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:42:05,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:42:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5331 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 5113 trivial. 0 not checked. [2022-04-06 19:42:05,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:42:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5331 backedges. 216 proven. 2 refuted. 0 times theorem prover too weak. 5113 trivial. 0 not checked. [2022-04-06 19:42:06,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361793747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:42:06,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:42:06,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 6, 6] total 85 [2022-04-06 19:42:06,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:42:06,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1727284663] [2022-04-06 19:42:06,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1727284663] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:42:06,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:42:06,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 19:42:06,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948553855] [2022-04-06 19:42:06,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:42:06,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 19:42:06,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:06,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 19:42:06,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=6876, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 19:42:06,401 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:13,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:42:13,332 INFO L93 Difference]: Finished difference Result 322 states and 327 transitions. [2022-04-06 19:42:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 19:42:13,332 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-04-06 19:42:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:42:13,333 INFO L225 Difference]: With dead ends: 322 [2022-04-06 19:42:13,333 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 19:42:13,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=269, Invalid=7041, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:42:13,337 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 11038 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 11114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 11038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:42:13,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 386 Invalid, 11114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 11038 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-04-06 19:42:13,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 19:42:13,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2022-04-06 19:42:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-04-06 19:42:13,347 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2022-04-06 19:42:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:42:13,347 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-04-06 19:42:13,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-04-06 19:42:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 19:42:13,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:42:13,347 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:42:13,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 19:42:13,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:42:13,567 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:42:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:42:13,568 INFO L85 PathProgramCache]: Analyzing trace with hash 540295815, now seen corresponding path program 147 times [2022-04-06 19:42:13,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:13,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1453072517] [2022-04-06 19:42:26,014 WARN L232 SmtUtils]: Spent 12.44s on a formula simplification. DAG size of input: 1358 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:42:26,126 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:26,126 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:26,265 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:26,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:42:26,265 INFO L85 PathProgramCache]: Analyzing trace with hash 540295815, now seen corresponding path program 148 times [2022-04-06 19:42:26,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:42:26,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147459485] [2022-04-06 19:42:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:42:26,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:42:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:29,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:42:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5478 backedges. 2 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:42:29,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:42:29,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147459485] [2022-04-06 19:42:29,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147459485] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:42:29,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134791880] [2022-04-06 19:42:29,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:42:29,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:42:29,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:42:29,635 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) [2022-04-06 19:42:29,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 19:42:30,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:42:30,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:42:30,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:42:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:42:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5478 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 5257 trivial. 0 not checked. [2022-04-06 19:42:30,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:42:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5478 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 5257 trivial. 0 not checked. [2022-04-06 19:42:31,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134791880] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:42:31,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:42:31,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 6, 6] total 86 [2022-04-06 19:42:31,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:42:31,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1453072517] [2022-04-06 19:42:31,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1453072517] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:42:31,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:42:31,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 19:42:31,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464007789] [2022-04-06 19:42:31,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:42:31,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 19:42:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 19:42:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=7043, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:42:31,428 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:42:38,802 INFO L93 Difference]: Finished difference Result 326 states and 331 transitions. [2022-04-06 19:42:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 19:42:38,802 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-04-06 19:42:38,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:42:38,803 INFO L225 Difference]: With dead ends: 326 [2022-04-06 19:42:38,803 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 19:42:38,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=272, Invalid=7210, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 19:42:38,804 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 11211 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 11288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 11211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:42:38,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 76 Invalid, 11288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 11211 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-04-06 19:42:38,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 19:42:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2022-04-06 19:42:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2022-04-06 19:42:38,813 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 163 [2022-04-06 19:42:38,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:42:38,813 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2022-04-06 19:42:38,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:38,813 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2022-04-06 19:42:38,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 19:42:38,813 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:42:38,813 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:42:38,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 19:42:39,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:42:39,033 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:42:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:42:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash 234740645, now seen corresponding path program 149 times [2022-04-06 19:42:39,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:39,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863239287] [2022-04-06 19:42:53,703 WARN L232 SmtUtils]: Spent 14.66s on a formula simplification. DAG size of input: 1376 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:42:53,818 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:53,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:53,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:53,967 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:42:53,967 INFO L85 PathProgramCache]: Analyzing trace with hash 234740645, now seen corresponding path program 150 times [2022-04-06 19:42:53,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:42:53,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784007701] [2022-04-06 19:42:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:42:53,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:42:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:57,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:42:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5627 backedges. 2 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:42:57,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:42:57,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784007701] [2022-04-06 19:42:57,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784007701] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:42:57,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386024394] [2022-04-06 19:42:57,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:42:57,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:42:57,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:42:57,451 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) [2022-04-06 19:42:57,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 19:42:57,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:42:57,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:42:57,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:42:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:42:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5627 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2022-04-06 19:42:58,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:42:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5627 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2022-04-06 19:42:58,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386024394] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:42:58,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:42:58,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 4, 4] total 83 [2022-04-06 19:42:58,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:42:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863239287] [2022-04-06 19:42:58,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863239287] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:42:58,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:42:58,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 19:42:58,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666219537] [2022-04-06 19:42:58,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:42:58,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 19:42:58,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:58,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 19:42:58,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 19:42:58,822 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:43:06,670 INFO L93 Difference]: Finished difference Result 330 states and 335 transitions. [2022-04-06 19:43:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 19:43:06,670 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-04-06 19:43:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:43:06,671 INFO L225 Difference]: With dead ends: 330 [2022-04-06 19:43:06,671 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 19:43:06,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=247, Invalid=6725, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 19:43:06,672 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 11568 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 11646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 11568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:43:06,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 216 Invalid, 11646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 11568 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-04-06 19:43:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 19:43:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2022-04-06 19:43:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2022-04-06 19:43:06,680 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 165 [2022-04-06 19:43:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:43:06,680 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2022-04-06 19:43:06,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:06,681 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2022-04-06 19:43:06,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 19:43:06,681 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:43:06,681 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:43:06,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 19:43:06,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-04-06 19:43:06,884 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:43:06,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:43:06,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1346001597, now seen corresponding path program 151 times [2022-04-06 19:43:06,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:06,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1633388476] [2022-04-06 19:43:26,274 WARN L232 SmtUtils]: Spent 19.38s on a formula simplification. DAG size of input: 1394 DAG size of output: 1 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 19:43:26,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:43:26,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:43:26,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:43:26,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:43:26,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1346001597, now seen corresponding path program 152 times [2022-04-06 19:43:26,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:43:26,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787212915] [2022-04-06 19:43:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:43:26,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:43:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:30,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:43:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 2 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:43:30,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:43:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787212915] [2022-04-06 19:43:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787212915] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:43:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826630541] [2022-04-06 19:43:30,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:43:30,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:43:30,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:43:30,248 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) [2022-04-06 19:43:30,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 19:43:30,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:43:30,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:43:30,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:43:30,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:43:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2022-04-06 19:43:31,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:43:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2022-04-06 19:43:32,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826630541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:43:32,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:43:32,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 6, 6] total 88 [2022-04-06 19:43:32,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:43:32,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1633388476] [2022-04-06 19:43:32,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1633388476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:43:32,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:43:32,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 19:43:32,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124278541] [2022-04-06 19:43:32,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:43:32,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 19:43:32,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:32,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 19:43:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=7383, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 19:43:32,172 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:43:40,120 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2022-04-06 19:43:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 19:43:40,120 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-04-06 19:43:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:43:40,121 INFO L225 Difference]: With dead ends: 334 [2022-04-06 19:43:40,121 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 19:43:40,122 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=278, Invalid=7554, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 19:43:40,122 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 79 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 11817 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 11896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 11817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:43:40,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 76 Invalid, 11896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 11817 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-04-06 19:43:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 19:43:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2022-04-06 19:43:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2022-04-06 19:43:40,130 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 167 [2022-04-06 19:43:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:43:40,131 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2022-04-06 19:43:40,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2022-04-06 19:43:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 19:43:40,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:43:40,131 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:43:40,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 19:43:40,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-04-06 19:43:40,335 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:43:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:43:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash -20873375, now seen corresponding path program 153 times [2022-04-06 19:43:40,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:40,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381741306]