/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-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:59:23,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:59:23,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:59:23,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:59:23,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 20:59:23,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 20:59:23,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 20:59:23,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 20:59:23,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 20:59:23,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 20:59:23,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 20:59:23,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 20:59:23,439 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 20:59:23,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 20:59:23,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 20:59:23,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 20:59:23,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 20:59:23,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 20:59:23,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:59:23,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:59:23,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:59:23,458 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 20:59:23,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:59:23,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:59:23,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:59:23,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:59:23,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:59:23,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:59:23,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:59:23,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:59:23,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:59:23,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:59:23,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:59:23,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:59:23,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:59:23,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:59:23,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:59:23,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:59:23,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:59:23,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:59:23,469 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:59:23,470 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:59:23,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:59:23,470 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:59:23,470 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:59:23,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:59:23,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:59:23,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:59:23,633 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:59:23,633 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:59:23,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-06 20:59:23,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/608448931/90f1aeae17664a2eb01c017f43148b7b/FLAG74ca1f898 [2022-04-06 20:59:23,980 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:59:23,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-06 20:59:23,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/608448931/90f1aeae17664a2eb01c017f43148b7b/FLAG74ca1f898 [2022-04-06 20:59:23,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/608448931/90f1aeae17664a2eb01c017f43148b7b [2022-04-06 20:59:23,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:59:23,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:59:23,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:59:23,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:59:23,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:59:23,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:59:23" (1/1) ... [2022-04-06 20:59:23,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61643ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:23, skipping insertion in model container [2022-04-06 20:59:23,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:59:23" (1/1) ... [2022-04-06 20:59:24,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:59:24,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:59:24,153 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-04-06 20:59:24,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:59:24,170 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:59:24,180 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-04-06 20:59:24,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:59:24,209 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:59:24,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24 WrapperNode [2022-04-06 20:59:24,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:59:24,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:59:24,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:59:24,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:59:24,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24" (1/1) ... [2022-04-06 20:59:24,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24" (1/1) ... [2022-04-06 20:59:24,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24" (1/1) ... [2022-04-06 20:59:24,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24" (1/1) ... [2022-04-06 20:59:24,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24" (1/1) ... [2022-04-06 20:59:24,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24" (1/1) ... [2022-04-06 20:59:24,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24" (1/1) ... [2022-04-06 20:59:24,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:59:24,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:59:24,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:59:24,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:59:24,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24" (1/1) ... [2022-04-06 20:59:24,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:59:24,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:24,274 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 20:59:24,291 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 20:59:24,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:59:24,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:59:24,301 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:59:24,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:59:24,302 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-04-06 20:59:24,302 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-04-06 20:59:24,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:59:24,302 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:59:24,302 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:59:24,302 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:59:24,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:59:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 20:59:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:59:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-04-06 20:59:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-04-06 20:59:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:59:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:59:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:59:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:59:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:59:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:59:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:59:24,369 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:59:24,371 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:59:24,557 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:59:24,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:59:24,561 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 20:59:24,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:59:24 BoogieIcfgContainer [2022-04-06 20:59:24,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:59:24,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:59:24,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:59:24,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:59:24,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:59:23" (1/3) ... [2022-04-06 20:59:24,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4be7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:59:24, skipping insertion in model container [2022-04-06 20:59:24,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:59:24" (2/3) ... [2022-04-06 20:59:24,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4be7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:59:24, skipping insertion in model container [2022-04-06 20:59:24,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:59:24" (3/3) ... [2022-04-06 20:59:24,567 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-04-06 20:59:24,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:59:24,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:59:24,596 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:59:24,612 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 20:59:24,612 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:59:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 20:59:24,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:59:24,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:24,629 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:24,629 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 1 times [2022-04-06 20:59:24,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:24,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [664033514] [2022-04-06 20:59:24,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:59:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 2 times [2022-04-06 20:59:24,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:24,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128198880] [2022-04-06 20:59:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:24,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:24,834 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 20:59:24,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:24,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128198880] [2022-04-06 20:59:24,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128198880] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:24,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:24,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:24,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:24,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [664033514] [2022-04-06 20:59:24,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [664033514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:24,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:24,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:24,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719073743] [2022-04-06 20:59:24,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:24,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:59:24,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:24,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:59:24,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:59:24,857 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:24,984 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-04-06 20:59:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:59:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 20:59:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:24,989 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:59:24,989 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:59:24,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:59:24,993 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:24,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:59:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 20:59:25,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-04-06 20:59:25,015 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-04-06 20:59:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:25,016 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-04-06 20:59:25,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-04-06 20:59:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:59:25,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:25,017 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:25,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:59:25,017 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:25,018 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 1 times [2022-04-06 20:59:25,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86778243] [2022-04-06 20:59:25,019 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:59:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 2 times [2022-04-06 20:59:25,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:25,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937016465] [2022-04-06 20:59:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:25,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 20:59:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,187 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 20:59:25,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937016465] [2022-04-06 20:59:25,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937016465] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:59:25,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:25,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86778243] [2022-04-06 20:59:25,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86778243] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:59:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753979384] [2022-04-06 20:59:25,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:25,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:59:25,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:59:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:59:25,190 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:25,496 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-04-06 20:59:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:59:25,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-06 20:59:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:25,498 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:59:25,499 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:59:25,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:59:25,502 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:25,503 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:25,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:59:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-06 20:59:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 20:59:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 20:59:25,527 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-04-06 20:59:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:25,528 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 20:59:25,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 20:59:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:59:25,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:25,530 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:25,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:59:25,531 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:25,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash -310269904, now seen corresponding path program 1 times [2022-04-06 20:59:25,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1577383407] [2022-04-06 20:59:25,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:25,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:25,545 INFO L85 PathProgramCache]: Analyzing trace with hash -310269904, now seen corresponding path program 2 times [2022-04-06 20:59:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:25,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387758825] [2022-04-06 20:59:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 20:59:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,607 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 20:59:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387758825] [2022-04-06 20:59:25,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387758825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:59:25,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:25,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1577383407] [2022-04-06 20:59:25,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1577383407] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:59:25,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574060768] [2022-04-06 20:59:25,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:25,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:59:25,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:59:25,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:59:25,610 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:25,673 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-04-06 20:59:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:59:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-04-06 20:59:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:25,674 INFO L225 Difference]: With dead ends: 59 [2022-04-06 20:59:25,674 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:59:25,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:59:25,675 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:25,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:59:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-04-06 20:59:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 20:59:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-04-06 20:59:25,683 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 32 [2022-04-06 20:59:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:25,683 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-04-06 20:59:25,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-04-06 20:59:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:59:25,684 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:25,684 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:25,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:59:25,684 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1053423629, now seen corresponding path program 1 times [2022-04-06 20:59:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1802963014] [2022-04-06 20:59:25,686 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:25,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:25,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1053423629, now seen corresponding path program 2 times [2022-04-06 20:59:25,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:25,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364860478] [2022-04-06 20:59:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:25,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 20:59:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,724 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 20:59:25,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:25,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364860478] [2022-04-06 20:59:25,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364860478] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:59:25,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:25,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1802963014] [2022-04-06 20:59:25,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1802963014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:59:25,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628380801] [2022-04-06 20:59:25,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:25,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:59:25,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:59:25,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:59:25,726 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:25,783 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-04-06 20:59:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:59:25,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-04-06 20:59:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:25,784 INFO L225 Difference]: With dead ends: 81 [2022-04-06 20:59:25,784 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 20:59:25,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:59:25,785 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:25,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 20:59:25,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-04-06 20:59:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 20:59:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-04-06 20:59:25,792 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 32 [2022-04-06 20:59:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:25,792 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-04-06 20:59:25,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:25,793 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-04-06 20:59:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:59:25,793 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:25,793 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:25,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:59:25,794 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:25,794 INFO L85 PathProgramCache]: Analyzing trace with hash 755216986, now seen corresponding path program 1 times [2022-04-06 20:59:25,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [59619287] [2022-04-06 20:59:25,795 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:25,795 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:25,795 INFO L85 PathProgramCache]: Analyzing trace with hash 755216986, now seen corresponding path program 2 times [2022-04-06 20:59:25,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:25,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983648130] [2022-04-06 20:59:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:25,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 20:59:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:25,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:25,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983648130] [2022-04-06 20:59:25,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983648130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:25,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:25,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [59619287] [2022-04-06 20:59:25,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [59619287] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:25,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250990895] [2022-04-06 20:59:25,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:25,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:59:25,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:59:25,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:59:25,847 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:25,917 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2022-04-06 20:59:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:59:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-06 20:59:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:25,918 INFO L225 Difference]: With dead ends: 77 [2022-04-06 20:59:25,918 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:59:25,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:59:25,919 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:25,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:59:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 20:59:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 20:59:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-04-06 20:59:25,925 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 33 [2022-04-06 20:59:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:25,925 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-04-06 20:59:25,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-04-06 20:59:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:59:25,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:25,926 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:25,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 20:59:25,926 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:25,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1803948538, now seen corresponding path program 1 times [2022-04-06 20:59:25,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [538902283] [2022-04-06 20:59:25,928 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:25,928 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:25,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1803948538, now seen corresponding path program 2 times [2022-04-06 20:59:25,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:25,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837382899] [2022-04-06 20:59:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:25,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 20:59:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:25,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:25,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837382899] [2022-04-06 20:59:25,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837382899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:25,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:25,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [538902283] [2022-04-06 20:59:25,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [538902283] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:25,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:25,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:25,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369589037] [2022-04-06 20:59:25,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:25,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:59:25,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:59:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:59:25,979 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:26,075 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-04-06 20:59:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:59:26,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-06 20:59:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:26,078 INFO L225 Difference]: With dead ends: 83 [2022-04-06 20:59:26,078 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 20:59:26,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:59:26,080 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:26,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 20:59:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 20:59:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 20:59:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-04-06 20:59:26,093 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 33 [2022-04-06 20:59:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:26,093 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-04-06 20:59:26,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-04-06 20:59:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:59:26,094 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:26,094 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:26,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 20:59:26,094 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1563500484, now seen corresponding path program 1 times [2022-04-06 20:59:26,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355976575] [2022-04-06 20:59:26,096 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:26,096 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:26,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1563500484, now seen corresponding path program 2 times [2022-04-06 20:59:26,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:26,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751530630] [2022-04-06 20:59:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:26,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:59:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:26,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:26,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751530630] [2022-04-06 20:59:26,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751530630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:26,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:26,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:26,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:26,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355976575] [2022-04-06 20:59:26,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355976575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:26,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:26,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:26,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716166925] [2022-04-06 20:59:26,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:26,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:59:26,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:59:26,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:59:26,156 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:26,234 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-06 20:59:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:59:26,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-04-06 20:59:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:26,235 INFO L225 Difference]: With dead ends: 57 [2022-04-06 20:59:26,236 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 20:59:26,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:59:26,237 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:26,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 20:59:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 20:59:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 20:59:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-04-06 20:59:26,249 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2022-04-06 20:59:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:26,249 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-04-06 20:59:26,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-04-06 20:59:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:59:26,252 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:26,253 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:26,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 20:59:26,253 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948107, now seen corresponding path program 1 times [2022-04-06 20:59:26,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294932853] [2022-04-06 20:59:26,256 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:26,256 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948107, now seen corresponding path program 2 times [2022-04-06 20:59:26,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:26,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098949554] [2022-04-06 20:59:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:26,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 20:59:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:26,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:26,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098949554] [2022-04-06 20:59:26,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098949554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:26,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:26,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:26,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:26,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294932853] [2022-04-06 20:59:26,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294932853] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:26,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:26,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:26,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570084488] [2022-04-06 20:59:26,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:26,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:59:26,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:59:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:59:26,336 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:26,397 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2022-04-06 20:59:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:59:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-06 20:59:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:26,400 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:59:26,400 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:59:26,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:59:26,402 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:26,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:59:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-04-06 20:59:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-04-06 20:59:26,408 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 35 [2022-04-06 20:59:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:26,409 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-04-06 20:59:26,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-04-06 20:59:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:59:26,410 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:26,411 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:26,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 20:59:26,411 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2078941294, now seen corresponding path program 1 times [2022-04-06 20:59:26,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818701703] [2022-04-06 20:59:26,414 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:26,418 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:26,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2078941294, now seen corresponding path program 2 times [2022-04-06 20:59:26,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:26,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855937823] [2022-04-06 20:59:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:26,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:59:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:26,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855937823] [2022-04-06 20:59:26,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855937823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:26,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:26,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:59:26,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818701703] [2022-04-06 20:59:26,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818701703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:26,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:26,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:59:26,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718995349] [2022-04-06 20:59:26,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:26,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:59:26,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:59:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:59:26,480 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:26,566 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-04-06 20:59:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:59:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-06 20:59:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:26,567 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:59:26,567 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:59:26,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:59:26,568 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:26,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:59:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 20:59:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-04-06 20:59:26,574 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2022-04-06 20:59:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:26,574 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-04-06 20:59:26,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:26,575 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-04-06 20:59:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:59:26,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:26,575 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:26,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 20:59:26,575 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1371807532, now seen corresponding path program 1 times [2022-04-06 20:59:26,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331526386] [2022-04-06 20:59:26,577 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:26,577 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1371807532, now seen corresponding path program 2 times [2022-04-06 20:59:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:26,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623247872] [2022-04-06 20:59:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:59:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 20:59:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623247872] [2022-04-06 20:59:26,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623247872] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:26,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:26,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:26,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:26,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331526386] [2022-04-06 20:59:26,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331526386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:26,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:26,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:59:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878557314] [2022-04-06 20:59:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:26,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:59:26,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:59:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:59:26,643 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:26,722 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-04-06 20:59:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:59:26,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-06 20:59:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:26,722 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:59:26,722 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:59:26,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:59:26,723 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:26,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:59:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 20:59:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-04-06 20:59:26,731 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2022-04-06 20:59:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:26,731 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-04-06 20:59:26,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-04-06 20:59:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:59:26,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:26,732 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:26,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 20:59:26,732 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1443111891, now seen corresponding path program 1 times [2022-04-06 20:59:26,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [735218435] [2022-04-06 20:59:26,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:26,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1443111891, now seen corresponding path program 2 times [2022-04-06 20:59:26,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:26,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234733928] [2022-04-06 20:59:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:26,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:59:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:26,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234733928] [2022-04-06 20:59:26,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234733928] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601758815] [2022-04-06 20:59:26,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:26,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:26,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:26,968 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 20:59:27,000 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 20:59:27,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:27,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:59:27,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:27,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:27,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601758815] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:27,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:27,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 25 [2022-04-06 20:59:27,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:27,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [735218435] [2022-04-06 20:59:27,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [735218435] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:27,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:27,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:59:27,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534709265] [2022-04-06 20:59:27,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:27,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:59:27,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:59:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:59:27,510 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:27,944 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2022-04-06 20:59:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:59:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-04-06 20:59:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:27,946 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:59:27,946 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:59:27,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:59:27,947 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:27,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 108 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:59:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-04-06 20:59:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 20:59:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-04-06 20:59:27,961 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 37 [2022-04-06 20:59:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:27,962 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-04-06 20:59:27,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-04-06 20:59:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:59:27,963 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:27,963 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:27,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 20:59:28,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 20:59:28,179 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash -437658803, now seen corresponding path program 3 times [2022-04-06 20:59:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:28,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1506070094] [2022-04-06 20:59:28,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:28,180 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:28,181 INFO L85 PathProgramCache]: Analyzing trace with hash -437658803, now seen corresponding path program 4 times [2022-04-06 20:59:28,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:28,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323456672] [2022-04-06 20:59:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:28,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:28,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:28,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:59:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:28,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:28,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323456672] [2022-04-06 20:59:28,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323456672] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:28,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426871506] [2022-04-06 20:59:28,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:28,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:28,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:28,233 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 20:59:28,292 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 20:59:28,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:28,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:59:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:28,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:28,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426871506] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:28,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:28,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-04-06 20:59:28,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:28,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1506070094] [2022-04-06 20:59:28,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1506070094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:28,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:28,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:59:28,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597566707] [2022-04-06 20:59:28,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:28,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:59:28,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:28,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:59:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:59:28,430 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:28,557 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-04-06 20:59:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:59:28,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-04-06 20:59:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:28,558 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:59:28,558 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:59:28,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:59:28,558 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:28,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:59:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-04-06 20:59:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 20:59:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-06 20:59:28,571 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 38 [2022-04-06 20:59:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:28,571 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-06 20:59:28,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-06 20:59:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:59:28,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:28,571 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:28,604 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 20:59:28,787 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,SelfDestructingSolverStorable11 [2022-04-06 20:59:28,788 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1488699212, now seen corresponding path program 5 times [2022-04-06 20:59:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [556588497] [2022-04-06 20:59:28,789 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:28,789 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:28,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1488699212, now seen corresponding path program 6 times [2022-04-06 20:59:28,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:28,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026006909] [2022-04-06 20:59:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:28,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:28,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:28,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:28,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:59:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:28,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:28,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026006909] [2022-04-06 20:59:28,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026006909] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:28,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849812915] [2022-04-06 20:59:28,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:28,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:28,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:28,891 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 20:59:28,928 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 20:59:28,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:59:28,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:28,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:59:28,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:29,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:29,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849812915] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:29,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:29,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-04-06 20:59:29,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:29,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [556588497] [2022-04-06 20:59:29,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [556588497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:29,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:29,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:59:29,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211892237] [2022-04-06 20:59:29,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:29,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:59:29,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:29,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:59:29,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:59:29,257 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:29,481 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-04-06 20:59:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:59:29,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-04-06 20:59:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:29,482 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:59:29,482 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:59:29,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:59:29,483 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:29,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 76 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:59:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-04-06 20:59:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 20:59:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-04-06 20:59:29,491 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 38 [2022-04-06 20:59:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:29,491 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-04-06 20:59:29,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-04-06 20:59:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:59:29,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:29,492 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:29,508 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 20:59:29,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:29,708 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1229776654, now seen corresponding path program 7 times [2022-04-06 20:59:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:29,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195580274] [2022-04-06 20:59:29,709 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:29,709 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1229776654, now seen corresponding path program 8 times [2022-04-06 20:59:29,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:29,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183473830] [2022-04-06 20:59:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:29,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:29,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:29,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 20:59:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:29,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183473830] [2022-04-06 20:59:29,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183473830] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083365385] [2022-04-06 20:59:29,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:29,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:29,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:29,771 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 20:59:29,791 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 20:59:29,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:29,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:59:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:29,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:29,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083365385] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:29,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:29,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-04-06 20:59:29,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:29,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195580274] [2022-04-06 20:59:29,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195580274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:29,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:29,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:59:29,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742571664] [2022-04-06 20:59:29,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:29,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:59:29,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:59:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:59:29,951 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:30,044 INFO L93 Difference]: Finished difference Result 140 states and 174 transitions. [2022-04-06 20:59:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:59:30,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-04-06 20:59:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:30,045 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:59:30,045 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 20:59:30,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:59:30,046 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:30,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 20:59:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-04-06 20:59:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 20:59:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-04-06 20:59:30,056 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 38 [2022-04-06 20:59:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:30,056 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-04-06 20:59:30,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-04-06 20:59:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:59:30,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:30,057 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:30,075 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 20:59:30,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:30,271 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1473231215, now seen corresponding path program 9 times [2022-04-06 20:59:30,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:30,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1621962305] [2022-04-06 20:59:30,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:30,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1473231215, now seen corresponding path program 10 times [2022-04-06 20:59:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:30,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065857633] [2022-04-06 20:59:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:30,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:30,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:30,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 20:59:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:30,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:30,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065857633] [2022-04-06 20:59:30,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065857633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:30,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042392676] [2022-04-06 20:59:30,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:30,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:30,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:30,363 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 20:59:30,363 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 20:59:30,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:30,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:30,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:59:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:30,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042392676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:30,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-04-06 20:59:30,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1621962305] [2022-04-06 20:59:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1621962305] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:30,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:59:30,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494940377] [2022-04-06 20:59:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:30,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:59:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:59:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:59:30,712 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:30,928 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-04-06 20:59:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:59:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-04-06 20:59:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:30,929 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:59:30,929 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:59:30,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:59:30,930 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:30,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 75 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:59:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-04-06 20:59:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-06 20:59:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-04-06 20:59:30,937 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 38 [2022-04-06 20:59:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:30,937 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-04-06 20:59:30,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-04-06 20:59:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:59:30,938 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:30,938 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:30,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:31,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:59:31,154 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:31,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1109766783, now seen corresponding path program 11 times [2022-04-06 20:59:31,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:31,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731980524] [2022-04-06 20:59:31,156 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:31,156 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1109766783, now seen corresponding path program 12 times [2022-04-06 20:59:31,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:31,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229465844] [2022-04-06 20:59:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:31,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:31,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:31,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:31,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:59:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:31,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229465844] [2022-04-06 20:59:31,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229465844] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688469427] [2022-04-06 20:59:31,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:31,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:31,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:31,274 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 20:59:31,275 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 20:59:31,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:59:31,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:31,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:59:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:31,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:31,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688469427] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:31,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:31,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-04-06 20:59:31,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:31,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731980524] [2022-04-06 20:59:31,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731980524] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:31,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:31,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:59:31,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997798057] [2022-04-06 20:59:31,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:31,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:59:31,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:59:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:59:31,633 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:31,867 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-04-06 20:59:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:59:31,868 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-06 20:59:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:31,868 INFO L225 Difference]: With dead ends: 108 [2022-04-06 20:59:31,868 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 20:59:31,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:59:31,869 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:31,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 79 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 20:59:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-04-06 20:59:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 77 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-06 20:59:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-04-06 20:59:31,878 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 39 [2022-04-06 20:59:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:31,878 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-04-06 20:59:31,878 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-04-06 20:59:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:59:31,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:31,879 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:31,897 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 20:59:32,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 20:59:32,095 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1701022282, now seen corresponding path program 13 times [2022-04-06 20:59:32,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:32,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2140864150] [2022-04-06 20:59:32,096 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:32,096 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1701022282, now seen corresponding path program 14 times [2022-04-06 20:59:32,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:32,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582645555] [2022-04-06 20:59:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:32,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:32,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:32,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:32,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 20:59:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:32,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:32,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582645555] [2022-04-06 20:59:32,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582645555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:32,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174668400] [2022-04-06 20:59:32,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:32,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:32,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:32,340 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 20:59:32,340 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 20:59:32,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:32,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:59:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:32,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:32,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174668400] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:32,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:32,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 27 [2022-04-06 20:59:32,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:32,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2140864150] [2022-04-06 20:59:32,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2140864150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:32,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:32,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:59:32,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614211853] [2022-04-06 20:59:32,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:32,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:59:32,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:59:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:59:32,792 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:33,344 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2022-04-06 20:59:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:59:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-06 20:59:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:33,347 INFO L225 Difference]: With dead ends: 137 [2022-04-06 20:59:33,347 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 20:59:33,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1904, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:59:33,348 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:33,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 128 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:59:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 20:59:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-04-06 20:59:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 107 states have internal predecessors, (120), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 20:59:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2022-04-06 20:59:33,363 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 39 [2022-04-06 20:59:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:33,364 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2022-04-06 20:59:33,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2022-04-06 20:59:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:59:33,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:33,365 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:33,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 20:59:33,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:33,581 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1844910907, now seen corresponding path program 15 times [2022-04-06 20:59:33,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:33,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [413896917] [2022-04-06 20:59:33,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:33,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1844910907, now seen corresponding path program 16 times [2022-04-06 20:59:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:33,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773120914] [2022-04-06 20:59:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:33,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:33,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:33,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:59:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:33,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773120914] [2022-04-06 20:59:33,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773120914] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654850406] [2022-04-06 20:59:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:33,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:33,703 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 20:59:33,707 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 20:59:33,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:33,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:59:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:33,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:34,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654850406] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:34,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:34,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-04-06 20:59:34,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:34,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [413896917] [2022-04-06 20:59:34,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [413896917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:34,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:34,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:59:34,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904709197] [2022-04-06 20:59:34,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:34,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:59:34,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:59:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:59:34,033 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:34,285 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2022-04-06 20:59:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:59:34,285 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-06 20:59:34,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:34,286 INFO L225 Difference]: With dead ends: 132 [2022-04-06 20:59:34,286 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 20:59:34,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:59:34,287 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:34,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 79 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 20:59:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-04-06 20:59:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 104 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-04-06 20:59:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2022-04-06 20:59:34,300 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 39 [2022-04-06 20:59:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:34,300 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2022-04-06 20:59:34,300 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2022-04-06 20:59:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:59:34,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:34,301 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:34,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 20:59:34,516 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,SelfDestructingSolverStorable17 [2022-04-06 20:59:34,516 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash 172610767, now seen corresponding path program 17 times [2022-04-06 20:59:34,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:34,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1460503926] [2022-04-06 20:59:34,518 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:34,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash 172610767, now seen corresponding path program 18 times [2022-04-06 20:59:34,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:34,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020159770] [2022-04-06 20:59:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:34,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:34,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:34,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:34,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 20:59:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:34,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:34,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020159770] [2022-04-06 20:59:34,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020159770] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:34,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415486172] [2022-04-06 20:59:34,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:34,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:34,689 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 20:59:34,690 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 20:59:34,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:59:34,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:34,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:59:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:34,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:35,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415486172] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:35,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:35,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-04-06 20:59:35,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:35,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1460503926] [2022-04-06 20:59:35,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1460503926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:35,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:35,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:59:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107209643] [2022-04-06 20:59:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:35,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:59:35,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:59:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:59:35,251 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:35,578 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2022-04-06 20:59:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:59:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-06 20:59:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:35,579 INFO L225 Difference]: With dead ends: 136 [2022-04-06 20:59:35,579 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:59:35,580 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:59:35,580 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 84 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:35,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 98 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:59:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-04-06 20:59:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-04-06 20:59:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2022-04-06 20:59:35,612 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 40 [2022-04-06 20:59:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:35,612 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2022-04-06 20:59:35,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2022-04-06 20:59:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:59:35,617 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:35,617 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:35,647 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 20:59:35,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:35,828 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash -306897140, now seen corresponding path program 19 times [2022-04-06 20:59:35,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:35,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1568721394] [2022-04-06 20:59:35,830 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:35,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash -306897140, now seen corresponding path program 20 times [2022-04-06 20:59:35,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:35,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888278890] [2022-04-06 20:59:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:35,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:35,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:35,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:35,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:59:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:35,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888278890] [2022-04-06 20:59:35,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888278890] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951359160] [2022-04-06 20:59:35,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:35,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:35,939 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 20:59:35,941 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 20:59:35,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:35,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:59:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:36,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:36,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951359160] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:36,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:36,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-04-06 20:59:36,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:36,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1568721394] [2022-04-06 20:59:36,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1568721394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:36,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:36,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:59:36,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054959667] [2022-04-06 20:59:36,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:36,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:59:36,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:36,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:59:36,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:59:36,316 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:36,547 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2022-04-06 20:59:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:59:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-06 20:59:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:36,548 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:59:36,549 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:59:36,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:59:36,549 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 83 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:36,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 100 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:59:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-04-06 20:59:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 100 states have internal predecessors, (112), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 20:59:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-04-06 20:59:36,565 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 40 [2022-04-06 20:59:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:36,565 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-04-06 20:59:36,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-04-06 20:59:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:59:36,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:36,566 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:36,584 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 20:59:36,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:36,766 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:36,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:36,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1295907854, now seen corresponding path program 21 times [2022-04-06 20:59:36,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:36,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1405662940] [2022-04-06 20:59:36,768 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:36,768 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1295907854, now seen corresponding path program 22 times [2022-04-06 20:59:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:36,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341111463] [2022-04-06 20:59:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:36,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:36,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:36,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 20:59:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:36,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:36,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341111463] [2022-04-06 20:59:36,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341111463] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:36,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237170555] [2022-04-06 20:59:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:36,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:36,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:36,831 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 20:59:36,847 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 20:59:36,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:36,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:59:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:36,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:37,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237170555] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:37,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:37,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 20:59:37,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:37,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1405662940] [2022-04-06 20:59:37,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1405662940] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:37,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:37,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:59:37,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556484964] [2022-04-06 20:59:37,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:37,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:59:37,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:59:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:59:37,021 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:37,156 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2022-04-06 20:59:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:59:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-06 20:59:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:37,157 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:59:37,157 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 20:59:37,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:59:37,157 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:37,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 58 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 20:59:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2022-04-06 20:59:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 85 states have internal predecessors, (97), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-04-06 20:59:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-04-06 20:59:37,169 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 40 [2022-04-06 20:59:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:37,169 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-04-06 20:59:37,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-04-06 20:59:37,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:59:37,170 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:37,170 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:37,192 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 20:59:37,385 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,SelfDestructingSolverStorable20 [2022-04-06 20:59:37,386 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1335621997, now seen corresponding path program 23 times [2022-04-06 20:59:37,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:37,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [771185029] [2022-04-06 20:59:37,387 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:37,387 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1335621997, now seen corresponding path program 24 times [2022-04-06 20:59:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884490622] [2022-04-06 20:59:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:37,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:37,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:37,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:37,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:59:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:37,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884490622] [2022-04-06 20:59:37,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884490622] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:37,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290864515] [2022-04-06 20:59:37,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:37,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:37,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:37,446 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 20:59:37,447 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 20:59:37,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:59:37,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:59:37,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:37,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:37,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290864515] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:37,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:37,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 20:59:37,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [771185029] [2022-04-06 20:59:37,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [771185029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:37,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:37,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:59:37,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592134078] [2022-04-06 20:59:37,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:37,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:59:37,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:37,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:59:37,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:59:37,622 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:37,774 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-04-06 20:59:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:59:37,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-04-06 20:59:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:37,775 INFO L225 Difference]: With dead ends: 115 [2022-04-06 20:59:37,775 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:59:37,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:59:37,776 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:37,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 56 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:59:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 20:59:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 88 states have internal predecessors, (100), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-04-06 20:59:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-04-06 20:59:37,788 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 40 [2022-04-06 20:59:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:37,788 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-04-06 20:59:37,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-04-06 20:59:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:59:37,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:37,789 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:37,805 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 20:59:38,005 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,SelfDestructingSolverStorable21 [2022-04-06 20:59:38,005 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:38,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:38,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1943349171, now seen corresponding path program 25 times [2022-04-06 20:59:38,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:38,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [426973017] [2022-04-06 20:59:38,006 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:38,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1943349171, now seen corresponding path program 26 times [2022-04-06 20:59:38,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:38,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343257675] [2022-04-06 20:59:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:38,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:38,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:38,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:38,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:59:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:38,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343257675] [2022-04-06 20:59:38,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343257675] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709913413] [2022-04-06 20:59:38,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:38,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:38,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:38,317 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 20:59:38,318 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 20:59:38,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:38,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:38,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:59:38,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:38,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:38,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709913413] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:38,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:38,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 29 [2022-04-06 20:59:38,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [426973017] [2022-04-06 20:59:38,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [426973017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:38,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:38,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:59:38,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083588716] [2022-04-06 20:59:38,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:38,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:59:38,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:38,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:59:38,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:59:38,791 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:39,545 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2022-04-06 20:59:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:59:39,548 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-04-06 20:59:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:39,549 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:59:39,549 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 20:59:39,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:59:39,550 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 105 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:39,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 151 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:59:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 20:59:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2022-04-06 20:59:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 103 states have internal predecessors, (115), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-04-06 20:59:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2022-04-06 20:59:39,570 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 41 [2022-04-06 20:59:39,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:39,571 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2022-04-06 20:59:39,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2022-04-06 20:59:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:59:39,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:39,572 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:39,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:39,779 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,SelfDestructingSolverStorable22 [2022-04-06 20:59:39,779 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:39,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:39,780 INFO L85 PathProgramCache]: Analyzing trace with hash -196254195, now seen corresponding path program 27 times [2022-04-06 20:59:39,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:39,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390753411] [2022-04-06 20:59:39,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:39,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash -196254195, now seen corresponding path program 28 times [2022-04-06 20:59:39,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:39,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443587212] [2022-04-06 20:59:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:39,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:39,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:39,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:39,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:59:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:40,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443587212] [2022-04-06 20:59:40,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443587212] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002171437] [2022-04-06 20:59:40,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:40,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:40,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:40,041 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 20:59:40,042 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 20:59:40,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:40,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:59:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:40,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:40,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002171437] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:40,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:40,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 29 [2022-04-06 20:59:40,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390753411] [2022-04-06 20:59:40,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390753411] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:40,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:40,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:59:40,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911707112] [2022-04-06 20:59:40,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:40,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:59:40,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:59:40,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:59:40,532 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:41,013 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2022-04-06 20:59:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:59:41,013 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-04-06 20:59:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:41,014 INFO L225 Difference]: With dead ends: 134 [2022-04-06 20:59:41,014 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:59:41,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=2076, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:59:41,015 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:41,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 123 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:59:41,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-04-06 20:59:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 112 states have internal predecessors, (124), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 20:59:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-04-06 20:59:41,032 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 41 [2022-04-06 20:59:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:41,032 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-04-06 20:59:41,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-04-06 20:59:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:59:41,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:41,033 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:41,049 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 20:59:41,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:41,250 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:41,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1133754580, now seen corresponding path program 29 times [2022-04-06 20:59:41,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:41,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440464117] [2022-04-06 20:59:41,251 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:41,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:41,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1133754580, now seen corresponding path program 30 times [2022-04-06 20:59:41,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:41,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149829859] [2022-04-06 20:59:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:41,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:41,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:41,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:41,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:59:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:41,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149829859] [2022-04-06 20:59:41,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149829859] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209385708] [2022-04-06 20:59:41,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:41,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:41,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:41,438 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 20:59:41,443 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 20:59:41,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:59:41,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:41,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:59:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:41,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:42,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209385708] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:42,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:42,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-04-06 20:59:42,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:42,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440464117] [2022-04-06 20:59:42,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440464117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:42,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:42,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:59:42,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119048301] [2022-04-06 20:59:42,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:42,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:59:42,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:42,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:59:42,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:59:42,169 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:42,649 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2022-04-06 20:59:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:59:42,649 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 20:59:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:42,650 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:59:42,650 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 20:59:42,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:59:42,651 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 106 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:42,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 113 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:59:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 20:59:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2022-04-06 20:59:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 115 states have internal predecessors, (129), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 20:59:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2022-04-06 20:59:42,669 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 42 [2022-04-06 20:59:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:42,669 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2022-04-06 20:59:42,669 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2022-04-06 20:59:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:59:42,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:42,670 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:42,686 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 20:59:42,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:42,886 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:42,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:42,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1181369487, now seen corresponding path program 31 times [2022-04-06 20:59:42,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:42,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729346220] [2022-04-06 20:59:42,887 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:42,887 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:42,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1181369487, now seen corresponding path program 32 times [2022-04-06 20:59:42,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:42,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791241139] [2022-04-06 20:59:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:42,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:42,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:42,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:42,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 20:59:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:43,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:43,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791241139] [2022-04-06 20:59:43,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791241139] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:43,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415721654] [2022-04-06 20:59:43,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:43,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:43,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:43,043 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 20:59:43,046 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 20:59:43,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:43,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:43,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:59:43,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:43,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:43,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415721654] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:43,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:43,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-04-06 20:59:43,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:43,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729346220] [2022-04-06 20:59:43,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729346220] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:43,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:43,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:59:43,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438470895] [2022-04-06 20:59:43,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:43,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:59:43,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:43,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:59:43,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:59:43,717 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:44,142 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2022-04-06 20:59:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:59:44,142 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 20:59:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:44,143 INFO L225 Difference]: With dead ends: 144 [2022-04-06 20:59:44,143 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 20:59:44,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:59:44,144 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 108 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:44,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 115 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 20:59:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-06 20:59:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 116 states have internal predecessors, (130), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-06 20:59:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2022-04-06 20:59:44,165 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 42 [2022-04-06 20:59:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:44,165 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2022-04-06 20:59:44,165 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2022-04-06 20:59:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:59:44,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:44,166 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:44,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 20:59:44,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:59:44,379 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:44,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash -439775891, now seen corresponding path program 33 times [2022-04-06 20:59:44,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:44,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496765840] [2022-04-06 20:59:44,380 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:44,380 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:44,381 INFO L85 PathProgramCache]: Analyzing trace with hash -439775891, now seen corresponding path program 34 times [2022-04-06 20:59:44,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:44,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758820578] [2022-04-06 20:59:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:44,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:44,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:44,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:44,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:59:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:44,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:44,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758820578] [2022-04-06 20:59:44,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758820578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:44,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129253352] [2022-04-06 20:59:44,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:44,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:44,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:44,423 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 20:59:44,424 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 20:59:44,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:44,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:44,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:59:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:44,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:44,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129253352] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:44,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:44,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-04-06 20:59:44,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:44,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496765840] [2022-04-06 20:59:44,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496765840] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:44,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:44,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:59:44,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805276638] [2022-04-06 20:59:44,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:44,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:59:44,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:59:44,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:59:44,571 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:44,709 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2022-04-06 20:59:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:59:44,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-04-06 20:59:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:44,710 INFO L225 Difference]: With dead ends: 186 [2022-04-06 20:59:44,710 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 20:59:44,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:59:44,711 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:44,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 53 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 20:59:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2022-04-06 20:59:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 128 states have (on average 1.2265625) internal successors, (157), 138 states have internal predecessors, (157), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-06 20:59:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2022-04-06 20:59:44,744 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 42 [2022-04-06 20:59:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:44,744 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2022-04-06 20:59:44,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2022-04-06 20:59:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:59:44,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:44,745 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:44,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 20:59:44,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:59:44,956 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash -466729134, now seen corresponding path program 35 times [2022-04-06 20:59:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:44,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1982810377] [2022-04-06 20:59:44,957 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:44,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash -466729134, now seen corresponding path program 36 times [2022-04-06 20:59:44,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:44,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198174492] [2022-04-06 20:59:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:44,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:44,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:45,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 20:59:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:45,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:45,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198174492] [2022-04-06 20:59:45,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198174492] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:45,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684247347] [2022-04-06 20:59:45,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:45,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:45,011 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 20:59:45,013 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 20:59:45,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:59:45,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:59:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:45,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:59:45,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684247347] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:45,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:45,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-04-06 20:59:45,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:45,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1982810377] [2022-04-06 20:59:45,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1982810377] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:45,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:45,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:59:45,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610957267] [2022-04-06 20:59:45,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:45,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:59:45,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:45,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:59:45,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:59:45,202 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:45,358 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2022-04-06 20:59:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:59:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 20:59:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:45,359 INFO L225 Difference]: With dead ends: 290 [2022-04-06 20:59:45,359 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 20:59:45,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:59:45,360 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:45,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 63 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 20:59:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2022-04-06 20:59:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 160 states have internal predecessors, (184), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-06 20:59:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2022-04-06 20:59:45,385 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 42 [2022-04-06 20:59:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:45,385 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2022-04-06 20:59:45,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2022-04-06 20:59:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:59:45,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:45,386 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:45,413 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 20:59:45,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:59:45,603 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1243243306, now seen corresponding path program 37 times [2022-04-06 20:59:45,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:45,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354402757] [2022-04-06 20:59:45,604 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:45,604 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1243243306, now seen corresponding path program 38 times [2022-04-06 20:59:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:45,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828533077] [2022-04-06 20:59:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:45,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:45,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 20:59:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:45,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:45,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828533077] [2022-04-06 20:59:45,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828533077] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:45,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669428024] [2022-04-06 20:59:45,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:45,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:45,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:45,898 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 20:59:45,915 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 20:59:45,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:45,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:59:45,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:46,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:46,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669428024] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:46,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:46,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 31 [2022-04-06 20:59:46,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:46,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354402757] [2022-04-06 20:59:46,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354402757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:46,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:46,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:59:46,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016588060] [2022-04-06 20:59:46,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:46,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:59:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:59:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:59:46,382 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:47,279 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-04-06 20:59:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:59:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 20:59:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:47,280 INFO L225 Difference]: With dead ends: 224 [2022-04-06 20:59:47,280 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 20:59:47,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=2672, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:59:47,282 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 130 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:47,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 170 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:59:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 20:59:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2022-04-06 20:59:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 175 states have internal predecessors, (199), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2022-04-06 20:59:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2022-04-06 20:59:47,326 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 43 [2022-04-06 20:59:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:47,326 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2022-04-06 20:59:47,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2022-04-06 20:59:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:59:47,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:47,327 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:47,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 20:59:47,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:59:47,543 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1453763067, now seen corresponding path program 39 times [2022-04-06 20:59:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [404492803] [2022-04-06 20:59:47,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:47,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:47,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1453763067, now seen corresponding path program 40 times [2022-04-06 20:59:47,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:47,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572203070] [2022-04-06 20:59:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:47,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:47,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:47,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:47,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:59:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:59:47,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:47,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572203070] [2022-04-06 20:59:47,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572203070] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:47,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695728114] [2022-04-06 20:59:47,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:47,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:47,704 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 20:59:47,755 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 20:59:47,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:47,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:47,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:59:47,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:59:47,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:59:48,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695728114] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:48,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:48,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-04-06 20:59:48,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [404492803] [2022-04-06 20:59:48,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [404492803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:48,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:48,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:59:48,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78159285] [2022-04-06 20:59:48,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:48,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:59:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:59:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:59:48,219 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:48,618 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2022-04-06 20:59:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:59:48,618 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 20:59:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:48,619 INFO L225 Difference]: With dead ends: 230 [2022-04-06 20:59:48,620 INFO L226 Difference]: Without dead ends: 215 [2022-04-06 20:59:48,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:59:48,621 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 99 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:48,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 101 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-06 20:59:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-04-06 20:59:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 192 states have internal predecessors, (209), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-04-06 20:59:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2022-04-06 20:59:48,664 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 43 [2022-04-06 20:59:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:48,665 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2022-04-06 20:59:48,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2022-04-06 20:59:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:59:48,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:48,666 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:48,703 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 20:59:48,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:48,892 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1804610186, now seen corresponding path program 41 times [2022-04-06 20:59:48,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:48,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297844132] [2022-04-06 20:59:48,893 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:48,893 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1804610186, now seen corresponding path program 42 times [2022-04-06 20:59:48,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:48,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602883790] [2022-04-06 20:59:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:48,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:48,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:48,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:49,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 20:59:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:49,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602883790] [2022-04-06 20:59:49,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602883790] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127486637] [2022-04-06 20:59:49,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:49,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:49,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:49,156 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 20:59:49,158 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 20:59:49,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:59:49,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:59:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:49,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:49,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127486637] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:49,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:49,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 31 [2022-04-06 20:59:49,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:49,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297844132] [2022-04-06 20:59:49,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297844132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:49,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:49,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:59:49,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400394064] [2022-04-06 20:59:49,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:49,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:59:49,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:49,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:59:49,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:59:49,711 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:50,419 INFO L93 Difference]: Finished difference Result 228 states and 271 transitions. [2022-04-06 20:59:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:59:50,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 20:59:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:50,420 INFO L225 Difference]: With dead ends: 228 [2022-04-06 20:59:50,420 INFO L226 Difference]: Without dead ends: 213 [2022-04-06 20:59:50,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=2460, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:59:50,422 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:50,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 143 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:59:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-06 20:59:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2022-04-06 20:59:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 190 states have internal predecessors, (208), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-04-06 20:59:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 248 transitions. [2022-04-06 20:59:50,458 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 248 transitions. Word has length 43 [2022-04-06 20:59:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:50,458 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 248 transitions. [2022-04-06 20:59:50,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 248 transitions. [2022-04-06 20:59:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:59:50,459 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:50,459 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:50,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:50,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:50,675 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:50,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2095538945, now seen corresponding path program 43 times [2022-04-06 20:59:50,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:50,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821163431] [2022-04-06 20:59:50,676 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:50,676 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2095538945, now seen corresponding path program 44 times [2022-04-06 20:59:50,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:50,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682552480] [2022-04-06 20:59:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:50,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:50,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:50,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:50,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:59:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:59:50,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:50,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682552480] [2022-04-06 20:59:50,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682552480] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:50,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305100222] [2022-04-06 20:59:50,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:50,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:50,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:50,828 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 20:59:50,851 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 20:59:50,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:50,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:50,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:59:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:59:51,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:59:51,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305100222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:51,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:51,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-04-06 20:59:51,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:51,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821163431] [2022-04-06 20:59:51,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821163431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:51,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:51,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:59:51,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017386930] [2022-04-06 20:59:51,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:51,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:59:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:51,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:59:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:59:51,242 INFO L87 Difference]: Start difference. First operand 208 states and 248 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:51,620 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2022-04-06 20:59:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:59:51,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 20:59:51,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:51,622 INFO L225 Difference]: With dead ends: 222 [2022-04-06 20:59:51,622 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 20:59:51,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:59:51,623 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 117 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:51,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 100 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:51,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 20:59:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-04-06 20:59:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 182 states have internal predecessors, (198), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-04-06 20:59:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2022-04-06 20:59:51,663 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 43 [2022-04-06 20:59:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:51,664 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2022-04-06 20:59:51,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2022-04-06 20:59:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:59:51,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:51,666 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:51,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:51,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:51,882 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:51,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1133635601, now seen corresponding path program 45 times [2022-04-06 20:59:51,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:51,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475768379] [2022-04-06 20:59:51,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:51,883 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1133635601, now seen corresponding path program 46 times [2022-04-06 20:59:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:51,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035154623] [2022-04-06 20:59:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:51,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:51,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:51,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 20:59:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:52,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035154623] [2022-04-06 20:59:52,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035154623] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553027033] [2022-04-06 20:59:52,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:52,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:52,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:52,114 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 20:59:52,115 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 20:59:52,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:52,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:52,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:59:52,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:52,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:52,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553027033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:52,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:52,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-04-06 20:59:52,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:52,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475768379] [2022-04-06 20:59:52,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475768379] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:52,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:52,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:59:52,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639342307] [2022-04-06 20:59:52,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:52,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:59:52,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:52,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:59:52,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:59:52,815 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:53,429 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2022-04-06 20:59:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:59:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-06 20:59:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:53,432 INFO L225 Difference]: With dead ends: 244 [2022-04-06 20:59:53,432 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 20:59:53,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=2247, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:59:53,433 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 126 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:53,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 138 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:59:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 20:59:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2022-04-06 20:59:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 202 states have internal predecessors, (220), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-04-06 20:59:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2022-04-06 20:59:53,542 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 44 [2022-04-06 20:59:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:53,542 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2022-04-06 20:59:53,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2022-04-06 20:59:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:59:53,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:53,544 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:53,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:53,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:53,774 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:53,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:53,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1915733740, now seen corresponding path program 47 times [2022-04-06 20:59:53,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:53,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730820210] [2022-04-06 20:59:53,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:53,776 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1915733740, now seen corresponding path program 48 times [2022-04-06 20:59:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:53,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51256632] [2022-04-06 20:59:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:53,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:53,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:53,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:59:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:53,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:53,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51256632] [2022-04-06 20:59:53,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51256632] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:53,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056137224] [2022-04-06 20:59:53,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:53,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:53,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:53,968 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 20:59:53,983 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 20:59:54,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:59:54,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:59:54,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:54,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:59:54,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056137224] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:54,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:54,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-04-06 20:59:54,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:54,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730820210] [2022-04-06 20:59:54,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730820210] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:54,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:54,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:59:54,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680668774] [2022-04-06 20:59:54,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:54,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:59:54,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:54,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:59:54,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:59:54,744 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:55,473 INFO L93 Difference]: Finished difference Result 236 states and 277 transitions. [2022-04-06 20:59:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:59:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-06 20:59:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:55,474 INFO L225 Difference]: With dead ends: 236 [2022-04-06 20:59:55,474 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 20:59:55,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=2247, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:59:55,476 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 131 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:55,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 140 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:59:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 20:59:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-04-06 20:59:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 203 states have internal predecessors, (221), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-04-06 20:59:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2022-04-06 20:59:55,518 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 44 [2022-04-06 20:59:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:55,518 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2022-04-06 20:59:55,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2022-04-06 20:59:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:59:55,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:55,519 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:55,536 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 20:59:55,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:55,735 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1794700818, now seen corresponding path program 49 times [2022-04-06 20:59:55,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:55,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2131978979] [2022-04-06 20:59:55,736 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:55,736 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1794700818, now seen corresponding path program 50 times [2022-04-06 20:59:55,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:55,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084367483] [2022-04-06 20:59:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:55,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:55,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:55,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:55,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 20:59:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 20:59:55,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084367483] [2022-04-06 20:59:55,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084367483] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657483137] [2022-04-06 20:59:55,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:55,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:55,817 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 20:59:55,818 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 20:59:55,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:55,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:55,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:59:55,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 20:59:55,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 20:59:56,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657483137] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:56,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:56,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-04-06 20:59:56,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:56,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2131978979] [2022-04-06 20:59:56,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2131978979] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:56,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:56,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:59:56,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598865922] [2022-04-06 20:59:56,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:56,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:59:56,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:56,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:59:56,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:59:56,020 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:56,232 INFO L93 Difference]: Finished difference Result 339 states and 391 transitions. [2022-04-06 20:59:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:59:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-06 20:59:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:56,234 INFO L225 Difference]: With dead ends: 339 [2022-04-06 20:59:56,234 INFO L226 Difference]: Without dead ends: 215 [2022-04-06 20:59:56,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:59:56,236 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:56,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 62 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-06 20:59:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2022-04-06 20:59:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 190 states have internal predecessors, (208), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-04-06 20:59:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 240 transitions. [2022-04-06 20:59:56,274 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 240 transitions. Word has length 44 [2022-04-06 20:59:56,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:56,274 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 240 transitions. [2022-04-06 20:59:56,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 240 transitions. [2022-04-06 20:59:56,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:59:56,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:56,275 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:56,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:56,479 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,SelfDestructingSolverStorable34 [2022-04-06 20:59:56,479 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1255089933, now seen corresponding path program 51 times [2022-04-06 20:59:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:56,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018987148] [2022-04-06 20:59:56,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:56,481 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:56,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1255089933, now seen corresponding path program 52 times [2022-04-06 20:59:56,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:56,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429354621] [2022-04-06 20:59:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:56,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:56,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:56,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:59:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 20:59:56,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:56,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429354621] [2022-04-06 20:59:56,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429354621] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:56,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351142817] [2022-04-06 20:59:56,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:56,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:56,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:56,552 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 20:59:56,553 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 20:59:56,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:56,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:56,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:59:56,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 20:59:56,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 20:59:56,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351142817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:56,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:56,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-04-06 20:59:56,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018987148] [2022-04-06 20:59:56,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018987148] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:56,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:56,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:59:56,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847204205] [2022-04-06 20:59:56,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:56,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:59:56,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:59:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:59:56,705 INFO L87 Difference]: Start difference. First operand 207 states and 240 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:56,831 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-04-06 20:59:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:59:56,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-04-06 20:59:56,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:56,832 INFO L225 Difference]: With dead ends: 233 [2022-04-06 20:59:56,832 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:59:56,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:59:56,833 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:56,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 58 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:59:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:59:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 20:59:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-04-06 20:59:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2022-04-06 20:59:56,908 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 44 [2022-04-06 20:59:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:56,908 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2022-04-06 20:59:56,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 20:59:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2022-04-06 20:59:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:59:56,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:56,909 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:56,925 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 20:59:57,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:59:57,123 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:57,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1761268627, now seen corresponding path program 53 times [2022-04-06 20:59:57,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:57,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [377183083] [2022-04-06 20:59:57,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:57,125 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1761268627, now seen corresponding path program 54 times [2022-04-06 20:59:57,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:57,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509396332] [2022-04-06 20:59:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:57,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:57,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:57,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:57,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:59:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:57,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:57,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509396332] [2022-04-06 20:59:57,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509396332] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:57,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956250991] [2022-04-06 20:59:57,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:57,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:57,479 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 20:59:57,494 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 20:59:57,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:59:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:57,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:59:57,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:57,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:59:57,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956250991] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:57,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:57,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 33 [2022-04-06 20:59:57,844 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [377183083] [2022-04-06 20:59:57,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [377183083] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:57,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:57,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:59:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348637493] [2022-04-06 20:59:57,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:57,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:59:57,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:59:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:59:57,847 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:58,722 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2022-04-06 20:59:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:59:58,723 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-04-06 20:59:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:58,724 INFO L225 Difference]: With dead ends: 270 [2022-04-06 20:59:58,724 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 20:59:58,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=3104, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:59:58,726 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 150 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:58,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 191 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:59:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 20:59:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 228. [2022-04-06 20:59:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 192 states have (on average 1.1875) internal successors, (228), 210 states have internal predecessors, (228), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-04-06 20:59:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 264 transitions. [2022-04-06 20:59:58,801 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 264 transitions. Word has length 45 [2022-04-06 20:59:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:58,801 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 264 transitions. [2022-04-06 20:59:58,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 20:59:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 264 transitions. [2022-04-06 20:59:58,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:59:58,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:58,802 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:58,820 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 20:59:59,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 20:59:59,018 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:59,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1247111507, now seen corresponding path program 55 times [2022-04-06 20:59:59,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:59,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1102543101] [2022-04-06 20:59:59,019 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:59,019 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1247111507, now seen corresponding path program 56 times [2022-04-06 20:59:59,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:59,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998159118] [2022-04-06 20:59:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:59,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:59,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:59,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 20:59:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:59,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:59:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998159118] [2022-04-06 20:59:59,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998159118] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302278996] [2022-04-06 20:59:59,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:59,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:59,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:59,335 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 20:59:59,336 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 20:59:59,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:59,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:59,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:59:59,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:59,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:59:59,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302278996] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:59,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:59,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 33 [2022-04-06 20:59:59,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1102543101] [2022-04-06 20:59:59,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1102543101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:59,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:59,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:59:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641887367] [2022-04-06 20:59:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:59,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:59:59,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:59:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:59:59,950 INFO L87 Difference]: Start difference. First operand 228 states and 264 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:00,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:00,581 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2022-04-06 21:00:00,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:00:00,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-04-06 21:00:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:00,583 INFO L225 Difference]: With dead ends: 234 [2022-04-06 21:00:00,583 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 21:00:00,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=2876, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 21:00:00,585 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:00,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 166 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:00:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 21:00:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 21:00:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2022-04-06 21:00:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 246 transitions. [2022-04-06 21:00:00,628 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 246 transitions. Word has length 45 [2022-04-06 21:00:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:00,628 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 246 transitions. [2022-04-06 21:00:00,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 246 transitions. [2022-04-06 21:00:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 21:00:00,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:00,629 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:00,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 21:00:00,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:00,844 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:00,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1602219117, now seen corresponding path program 57 times [2022-04-06 21:00:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:00,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356609552] [2022-04-06 21:00:00,845 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:00,846 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1602219117, now seen corresponding path program 58 times [2022-04-06 21:00:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:00,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849453918] [2022-04-06 21:00:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:00,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:00,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:01,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 21:00:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:01,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:01,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849453918] [2022-04-06 21:00:01,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849453918] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:01,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168351829] [2022-04-06 21:00:01,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:01,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:01,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:01,140 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 21:00:01,141 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 21:00:01,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:01,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:01,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 21:00:01,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:01,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:01,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168351829] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:01,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:01,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-04-06 21:00:01,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:01,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356609552] [2022-04-06 21:00:01,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356609552] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:01,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:01,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:00:01,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74006172] [2022-04-06 21:00:01,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:01,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:00:01,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:01,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:00:01,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:00:01,598 INFO L87 Difference]: Start difference. First operand 212 states and 246 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:02,039 INFO L93 Difference]: Finished difference Result 230 states and 267 transitions. [2022-04-06 21:00:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:00:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-04-06 21:00:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:02,041 INFO L225 Difference]: With dead ends: 230 [2022-04-06 21:00:02,041 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 21:00:02,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 21:00:02,043 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:02,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 133 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:00:02,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 21:00:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-04-06 21:00:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 204 states have internal predecessors, (222), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2022-04-06 21:00:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2022-04-06 21:00:02,124 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 45 [2022-04-06 21:00:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:02,124 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2022-04-06 21:00:02,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2022-04-06 21:00:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 21:00:02,127 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:02,127 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:02,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 21:00:02,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 21:00:02,343 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash 215774988, now seen corresponding path program 59 times [2022-04-06 21:00:02,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:02,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [35369512] [2022-04-06 21:00:02,344 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:02,345 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash 215774988, now seen corresponding path program 60 times [2022-04-06 21:00:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:02,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8887161] [2022-04-06 21:00:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:02,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:02,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:02,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:02,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 21:00:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:02,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:02,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8887161] [2022-04-06 21:00:02,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8887161] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:02,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72449951] [2022-04-06 21:00:02,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:02,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:02,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:02,584 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 21:00:02,584 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 21:00:02,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:00:02,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:00:02,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:03,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:03,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72449951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:03,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:03,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-04-06 21:00:03,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:03,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [35369512] [2022-04-06 21:00:03,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [35369512] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:03,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:03,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:00:03,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897352305] [2022-04-06 21:00:03,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:03,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:00:03,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:03,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:00:03,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:00:03,510 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:04,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:04,409 INFO L93 Difference]: Finished difference Result 268 states and 314 transitions. [2022-04-06 21:00:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:00:04,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 21:00:04,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:04,411 INFO L225 Difference]: With dead ends: 268 [2022-04-06 21:00:04,411 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 21:00:04,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=3068, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 21:00:04,413 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 147 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:04,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 158 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:00:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 21:00:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2022-04-06 21:00:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 226 states have internal predecessors, (246), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2022-04-06 21:00:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 287 transitions. [2022-04-06 21:00:04,465 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 287 transitions. Word has length 46 [2022-04-06 21:00:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:04,465 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 287 transitions. [2022-04-06 21:00:04,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 287 transitions. [2022-04-06 21:00:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 21:00:04,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:04,467 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:04,484 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 21:00:04,675 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,SelfDestructingSolverStorable39 [2022-04-06 21:00:04,675 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:04,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash 256944047, now seen corresponding path program 61 times [2022-04-06 21:00:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:04,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [473580277] [2022-04-06 21:00:04,676 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:04,676 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash 256944047, now seen corresponding path program 62 times [2022-04-06 21:00:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:04,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30936924] [2022-04-06 21:00:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:04,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:04,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 21:00:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:04,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30936924] [2022-04-06 21:00:04,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30936924] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:04,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204568971] [2022-04-06 21:00:04,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:04,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:04,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:04,883 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 21:00:04,884 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 21:00:04,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:04,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:04,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:00:04,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:05,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:05,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204568971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:05,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:05,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-04-06 21:00:05,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:05,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [473580277] [2022-04-06 21:00:05,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [473580277] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:05,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:05,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:00:05,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405893631] [2022-04-06 21:00:05,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:05,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:00:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:05,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:00:05,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:00:05,759 INFO L87 Difference]: Start difference. First operand 245 states and 287 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:06,694 INFO L93 Difference]: Finished difference Result 260 states and 302 transitions. [2022-04-06 21:00:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:00:06,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 21:00:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:06,696 INFO L225 Difference]: With dead ends: 260 [2022-04-06 21:00:06,696 INFO L226 Difference]: Without dead ends: 248 [2022-04-06 21:00:06,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=3068, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 21:00:06,697 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 153 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:06,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 155 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:00:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-04-06 21:00:06,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2022-04-06 21:00:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 227 states have internal predecessors, (247), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-04-06 21:00:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 286 transitions. [2022-04-06 21:00:06,750 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 286 transitions. Word has length 46 [2022-04-06 21:00:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:06,750 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 286 transitions. [2022-04-06 21:00:06,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 286 transitions. [2022-04-06 21:00:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 21:00:06,752 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:06,752 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:06,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 21:00:06,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:06,968 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -521678067, now seen corresponding path program 63 times [2022-04-06 21:00:06,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:06,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916056533] [2022-04-06 21:00:06,969 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:06,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:06,969 INFO L85 PathProgramCache]: Analyzing trace with hash -521678067, now seen corresponding path program 64 times [2022-04-06 21:00:06,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:06,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050800470] [2022-04-06 21:00:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:06,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:06,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:06,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:06,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 21:00:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 21:00:07,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:07,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050800470] [2022-04-06 21:00:07,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050800470] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:07,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448132780] [2022-04-06 21:00:07,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:07,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:07,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:07,030 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 21:00:07,032 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 21:00:07,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:07,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:07,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:00:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 21:00:07,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 21:00:07,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448132780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:07,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:07,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-04-06 21:00:07,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:07,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916056533] [2022-04-06 21:00:07,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916056533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:07,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:07,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:00:07,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912180267] [2022-04-06 21:00:07,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:07,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:00:07,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:07,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:00:07,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:00:07,242 INFO L87 Difference]: Start difference. First operand 246 states and 286 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:00:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:07,410 INFO L93 Difference]: Finished difference Result 332 states and 391 transitions. [2022-04-06 21:00:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:00:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-04-06 21:00:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:07,411 INFO L225 Difference]: With dead ends: 332 [2022-04-06 21:00:07,411 INFO L226 Difference]: Without dead ends: 302 [2022-04-06 21:00:07,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:00:07,413 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:07,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 52 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:00:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-04-06 21:00:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 284. [2022-04-06 21:00:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 245 states have (on average 1.1918367346938776) internal successors, (292), 265 states have internal predecessors, (292), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-04-06 21:00:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-04-06 21:00:07,504 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 46 [2022-04-06 21:00:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:07,504 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-04-06 21:00:07,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:00:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-04-06 21:00:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 21:00:07,506 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:07,506 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:07,524 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 21:00:07,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:07,722 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash -467445298, now seen corresponding path program 65 times [2022-04-06 21:00:07,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:07,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [681019200] [2022-04-06 21:00:07,723 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:07,723 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:07,723 INFO L85 PathProgramCache]: Analyzing trace with hash -467445298, now seen corresponding path program 66 times [2022-04-06 21:00:07,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:07,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449324522] [2022-04-06 21:00:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:07,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:07,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:07,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:07,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 21:00:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 21:00:07,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449324522] [2022-04-06 21:00:07,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449324522] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634102531] [2022-04-06 21:00:07,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:07,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:07,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:07,816 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 21:00:07,817 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 21:00:07,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:00:07,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:07,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:00:07,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 21:00:07,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 21:00:08,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634102531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:08,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:08,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-04-06 21:00:08,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [681019200] [2022-04-06 21:00:08,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [681019200] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:08,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:08,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:00:08,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405278919] [2022-04-06 21:00:08,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:08,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:00:08,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:08,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:00:08,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:00:08,040 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:08,286 INFO L93 Difference]: Finished difference Result 525 states and 613 transitions. [2022-04-06 21:00:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:00:08,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 21:00:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:08,288 INFO L225 Difference]: With dead ends: 525 [2022-04-06 21:00:08,288 INFO L226 Difference]: Without dead ends: 340 [2022-04-06 21:00:08,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:00:08,290 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:08,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 60 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:00:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-04-06 21:00:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 322. [2022-04-06 21:00:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-04-06 21:00:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 376 transitions. [2022-04-06 21:00:08,369 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 376 transitions. Word has length 46 [2022-04-06 21:00:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:08,369 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 376 transitions. [2022-04-06 21:00:08,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 376 transitions. [2022-04-06 21:00:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 21:00:08,371 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:08,371 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:08,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 21:00:08,586 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,SelfDestructingSolverStorable42 [2022-04-06 21:00:08,587 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:08,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:08,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1644141558, now seen corresponding path program 67 times [2022-04-06 21:00:08,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:08,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804217143] [2022-04-06 21:00:08,587 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:08,588 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1644141558, now seen corresponding path program 68 times [2022-04-06 21:00:08,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:08,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146529954] [2022-04-06 21:00:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:08,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:08,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:08,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:08,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 21:00:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:00:08,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:08,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146529954] [2022-04-06 21:00:08,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146529954] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:08,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072745066] [2022-04-06 21:00:08,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:08,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:08,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:08,956 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 21:00:08,957 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 21:00:09,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:09,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:00:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:00:09,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:00:09,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072745066] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:09,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:09,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 35 [2022-04-06 21:00:09,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:09,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804217143] [2022-04-06 21:00:09,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804217143] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:09,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:09,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:00:09,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604442253] [2022-04-06 21:00:09,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:09,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:00:09,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:00:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:00:09,498 INFO L87 Difference]: Start difference. First operand 322 states and 376 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:10,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:10,580 INFO L93 Difference]: Finished difference Result 392 states and 457 transitions. [2022-04-06 21:00:10,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:00:10,581 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 21:00:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:10,582 INFO L225 Difference]: With dead ends: 392 [2022-04-06 21:00:10,582 INFO L226 Difference]: Without dead ends: 386 [2022-04-06 21:00:10,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=3568, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 21:00:10,584 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 174 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3110 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 3150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:10,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 213 Invalid, 3150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:00:10,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-04-06 21:00:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 338. [2022-04-06 21:00:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 296 states have (on average 1.1891891891891893) internal successors, (352), 318 states have internal predecessors, (352), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2022-04-06 21:00:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 395 transitions. [2022-04-06 21:00:10,659 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 395 transitions. Word has length 47 [2022-04-06 21:00:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:10,660 INFO L478 AbstractCegarLoop]: Abstraction has 338 states and 395 transitions. [2022-04-06 21:00:10,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 395 transitions. [2022-04-06 21:00:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 21:00:10,661 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:10,661 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:10,691 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 21:00:10,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:10,878 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:10,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1497239530, now seen corresponding path program 69 times [2022-04-06 21:00:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:10,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1557718316] [2022-04-06 21:00:10,879 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:10,879 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:10,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1497239530, now seen corresponding path program 70 times [2022-04-06 21:00:10,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:10,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92955250] [2022-04-06 21:00:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:10,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:10,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:10,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:11,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 21:00:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:00:11,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:11,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92955250] [2022-04-06 21:00:11,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92955250] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:11,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640289529] [2022-04-06 21:00:11,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:11,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:11,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:11,207 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 21:00:11,209 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 21:00:11,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:11,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:11,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 21:00:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:00:11,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:00:11,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640289529] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:11,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:11,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 35 [2022-04-06 21:00:11,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:11,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1557718316] [2022-04-06 21:00:11,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1557718316] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:11,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:11,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:00:11,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031815725] [2022-04-06 21:00:11,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:11,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:00:11,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:11,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:00:11,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:00:11,874 INFO L87 Difference]: Start difference. First operand 338 states and 395 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:12,912 INFO L93 Difference]: Finished difference Result 344 states and 400 transitions. [2022-04-06 21:00:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:00:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 21:00:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:12,914 INFO L225 Difference]: With dead ends: 344 [2022-04-06 21:00:12,914 INFO L226 Difference]: Without dead ends: 322 [2022-04-06 21:00:12,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=3324, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 21:00:12,916 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 120 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:12,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 180 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:00:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-04-06 21:00:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2022-04-06 21:00:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-04-06 21:00:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 377 transitions. [2022-04-06 21:00:13,010 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 377 transitions. Word has length 47 [2022-04-06 21:00:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:13,010 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 377 transitions. [2022-04-06 21:00:13,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 377 transitions. [2022-04-06 21:00:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 21:00:13,011 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:13,012 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:13,028 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 21:00:13,227 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,SelfDestructingSolverStorable44 [2022-04-06 21:00:13,228 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1271699905, now seen corresponding path program 71 times [2022-04-06 21:00:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045440960] [2022-04-06 21:00:13,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:13,229 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1271699905, now seen corresponding path program 72 times [2022-04-06 21:00:13,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:13,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024320035] [2022-04-06 21:00:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:13,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:13,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:13,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 21:00:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:00:13,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024320035] [2022-04-06 21:00:13,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024320035] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617660446] [2022-04-06 21:00:13,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:13,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:13,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:13,442 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 21:00:13,483 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 21:00:13,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:00:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:00:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 21:00:13,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 21:00:14,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617660446] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:14,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:14,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-04-06 21:00:14,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:14,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045440960] [2022-04-06 21:00:14,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045440960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:14,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:14,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:00:14,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234358940] [2022-04-06 21:00:14,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:14,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:00:14,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:00:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:00:14,119 INFO L87 Difference]: Start difference. First operand 322 states and 377 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:14,704 INFO L93 Difference]: Finished difference Result 378 states and 443 transitions. [2022-04-06 21:00:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:00:14,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 21:00:14,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:14,707 INFO L225 Difference]: With dead ends: 378 [2022-04-06 21:00:14,707 INFO L226 Difference]: Without dead ends: 362 [2022-04-06 21:00:14,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:00:14,711 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 135 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:14,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 123 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:00:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-04-06 21:00:14,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2022-04-06 21:00:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 303 states have (on average 1.174917491749175) internal successors, (356), 333 states have internal predecessors, (356), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-04-06 21:00:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 416 transitions. [2022-04-06 21:00:14,798 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 416 transitions. Word has length 47 [2022-04-06 21:00:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:14,798 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 416 transitions. [2022-04-06 21:00:14,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 416 transitions. [2022-04-06 21:00:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 21:00:14,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:14,801 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:14,825 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 21:00:15,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:15,007 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash 83484810, now seen corresponding path program 73 times [2022-04-06 21:00:15,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:15,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414760520] [2022-04-06 21:00:15,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:15,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:15,009 INFO L85 PathProgramCache]: Analyzing trace with hash 83484810, now seen corresponding path program 74 times [2022-04-06 21:00:15,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:15,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619979751] [2022-04-06 21:00:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:15,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:15,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:15,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:15,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 21:00:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:15,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619979751] [2022-04-06 21:00:15,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619979751] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324237921] [2022-04-06 21:00:15,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:15,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:15,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:15,320 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 21:00:15,322 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 21:00:15,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:15,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:15,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 21:00:15,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:15,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:16,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324237921] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:16,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:16,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 35 [2022-04-06 21:00:16,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:16,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414760520] [2022-04-06 21:00:16,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414760520] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:16,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:16,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:00:16,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646071198] [2022-04-06 21:00:16,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:16,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:00:16,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:00:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:00:16,038 INFO L87 Difference]: Start difference. First operand 357 states and 416 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:16,763 INFO L93 Difference]: Finished difference Result 375 states and 438 transitions. [2022-04-06 21:00:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:00:16,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 21:00:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:16,765 INFO L225 Difference]: With dead ends: 375 [2022-04-06 21:00:16,765 INFO L226 Difference]: Without dead ends: 359 [2022-04-06 21:00:16,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 21:00:16,767 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:16,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 153 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:00:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-06 21:00:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 354. [2022-04-06 21:00:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 300 states have (on average 1.18) internal successors, (354), 330 states have internal predecessors, (354), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-04-06 21:00:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 414 transitions. [2022-04-06 21:00:16,863 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 414 transitions. Word has length 47 [2022-04-06 21:00:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:16,863 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 414 transitions. [2022-04-06 21:00:16,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 414 transitions. [2022-04-06 21:00:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 21:00:16,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:16,865 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:16,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 21:00:17,069 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 21:00:17,069 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1251929861, now seen corresponding path program 75 times [2022-04-06 21:00:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:17,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2076530278] [2022-04-06 21:00:17,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:17,071 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1251929861, now seen corresponding path program 76 times [2022-04-06 21:00:17,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:17,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169307248] [2022-04-06 21:00:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:17,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:17,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:17,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:17,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:00:17,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:17,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169307248] [2022-04-06 21:00:17,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169307248] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:17,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516511950] [2022-04-06 21:00:17,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:17,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:17,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:17,312 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 21:00:17,313 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 21:00:17,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:17,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:00:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 21:00:17,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 21:00:17,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516511950] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:17,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:17,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-04-06 21:00:17,889 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:17,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2076530278] [2022-04-06 21:00:17,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2076530278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:17,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:17,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:00:17,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449562755] [2022-04-06 21:00:17,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:17,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:00:17,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:17,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:00:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:00:17,890 INFO L87 Difference]: Start difference. First operand 354 states and 414 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:18,512 INFO L93 Difference]: Finished difference Result 368 states and 427 transitions. [2022-04-06 21:00:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:00:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 21:00:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:18,524 INFO L225 Difference]: With dead ends: 368 [2022-04-06 21:00:18,524 INFO L226 Difference]: Without dead ends: 346 [2022-04-06 21:00:18,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:00:18,526 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 143 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:18,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 122 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:00:18,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-04-06 21:00:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2022-04-06 21:00:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 290 states have (on average 1.1793103448275861) internal successors, (342), 320 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2022-04-06 21:00:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 398 transitions. [2022-04-06 21:00:18,612 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 398 transitions. Word has length 47 [2022-04-06 21:00:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:18,614 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 398 transitions. [2022-04-06 21:00:18,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 398 transitions. [2022-04-06 21:00:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 21:00:18,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:18,616 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:18,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 21:00:18,831 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,SelfDestructingSolverStorable47 [2022-04-06 21:00:18,831 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash -448253169, now seen corresponding path program 77 times [2022-04-06 21:00:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:18,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1287582968] [2022-04-06 21:00:18,832 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:18,833 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash -448253169, now seen corresponding path program 78 times [2022-04-06 21:00:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:18,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319784042] [2022-04-06 21:00:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:18,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:18,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:18,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 21:00:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:19,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319784042] [2022-04-06 21:00:19,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319784042] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068419469] [2022-04-06 21:00:19,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:19,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:19,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:19,133 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 21:00:19,134 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 21:00:19,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:00:19,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:00:19,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:19,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:20,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068419469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:20,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:20,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-04-06 21:00:20,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1287582968] [2022-04-06 21:00:20,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1287582968] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:20,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:20,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:00:20,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050318166] [2022-04-06 21:00:20,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:20,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:00:20,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:00:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:00:20,168 INFO L87 Difference]: Start difference. First operand 344 states and 398 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:21,458 INFO L93 Difference]: Finished difference Result 410 states and 477 transitions. [2022-04-06 21:00:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:00:21,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-06 21:00:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:21,462 INFO L225 Difference]: With dead ends: 410 [2022-04-06 21:00:21,462 INFO L226 Difference]: Without dead ends: 396 [2022-04-06 21:00:21,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=273, Invalid=4017, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:00:21,466 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 168 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:21,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 178 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 21:00:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-04-06 21:00:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 387. [2022-04-06 21:00:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 327 states have (on average 1.1773700305810397) internal successors, (385), 361 states have internal predecessors, (385), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2022-04-06 21:00:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 449 transitions. [2022-04-06 21:00:21,623 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 449 transitions. Word has length 48 [2022-04-06 21:00:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:21,623 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 449 transitions. [2022-04-06 21:00:21,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 449 transitions. [2022-04-06 21:00:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 21:00:21,627 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:21,627 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:21,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 21:00:21,834 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,SelfDestructingSolverStorable48 [2022-04-06 21:00:21,834 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash 827987660, now seen corresponding path program 79 times [2022-04-06 21:00:21,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:21,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1234763281] [2022-04-06 21:00:21,835 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:21,835 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash 827987660, now seen corresponding path program 80 times [2022-04-06 21:00:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:21,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524250410] [2022-04-06 21:00:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:21,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:21,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:21,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:21,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:22,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524250410] [2022-04-06 21:00:22,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524250410] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350338263] [2022-04-06 21:00:22,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:22,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:22,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:22,106 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 21:00:22,108 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 21:00:22,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:22,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:22,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:00:22,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:22,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:23,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350338263] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:23,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:23,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-04-06 21:00:23,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:23,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1234763281] [2022-04-06 21:00:23,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1234763281] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:23,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:23,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:00:23,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603058576] [2022-04-06 21:00:23,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:23,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:00:23,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:23,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:00:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:00:23,252 INFO L87 Difference]: Start difference. First operand 387 states and 449 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:24,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:24,491 INFO L93 Difference]: Finished difference Result 402 states and 464 transitions. [2022-04-06 21:00:24,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:00:24,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-06 21:00:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:24,493 INFO L225 Difference]: With dead ends: 402 [2022-04-06 21:00:24,493 INFO L226 Difference]: Without dead ends: 390 [2022-04-06 21:00:24,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=273, Invalid=4017, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:00:24,495 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 176 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:24,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 180 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:00:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-06 21:00:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2022-04-06 21:00:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 328 states have (on average 1.1768292682926829) internal successors, (386), 362 states have internal predecessors, (386), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-04-06 21:00:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 447 transitions. [2022-04-06 21:00:24,604 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 447 transitions. Word has length 48 [2022-04-06 21:00:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:24,604 INFO L478 AbstractCegarLoop]: Abstraction has 388 states and 447 transitions. [2022-04-06 21:00:24,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 447 transitions. [2022-04-06 21:00:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 21:00:24,607 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:24,607 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:24,641 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 21:00:24,823 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,SelfDestructingSolverStorable49 [2022-04-06 21:00:24,823 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash 179082418, now seen corresponding path program 81 times [2022-04-06 21:00:24,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:24,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [871786717] [2022-04-06 21:00:24,824 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:24,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash 179082418, now seen corresponding path program 82 times [2022-04-06 21:00:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:24,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319473183] [2022-04-06 21:00:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:24,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:24,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:24,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 21:00:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:24,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:24,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319473183] [2022-04-06 21:00:24,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319473183] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:24,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908904003] [2022-04-06 21:00:24,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:24,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:24,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:24,900 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 21:00:24,901 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 21:00:24,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:24,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:24,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:00:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:25,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:25,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908904003] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:25,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:25,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-04-06 21:00:25,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:25,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [871786717] [2022-04-06 21:00:25,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [871786717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:25,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:25,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:00:25,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225050755] [2022-04-06 21:00:25,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:25,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:00:25,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:00:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:00:25,114 INFO L87 Difference]: Start difference. First operand 388 states and 447 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:25,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:25,537 INFO L93 Difference]: Finished difference Result 593 states and 672 transitions. [2022-04-06 21:00:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:00:25,538 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-06 21:00:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:25,541 INFO L225 Difference]: With dead ends: 593 [2022-04-06 21:00:25,541 INFO L226 Difference]: Without dead ends: 383 [2022-04-06 21:00:25,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:00:25,546 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:25,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 61 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:00:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-04-06 21:00:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 375. [2022-04-06 21:00:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 321 states have (on average 1.1682242990654206) internal successors, (375), 351 states have internal predecessors, (375), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-04-06 21:00:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 428 transitions. [2022-04-06 21:00:25,707 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 428 transitions. Word has length 48 [2022-04-06 21:00:25,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:25,707 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 428 transitions. [2022-04-06 21:00:25,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 428 transitions. [2022-04-06 21:00:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 21:00:25,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:25,710 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:25,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 21:00:25,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:25,926 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:25,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2046793773, now seen corresponding path program 83 times [2022-04-06 21:00:25,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:25,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [954577699] [2022-04-06 21:00:25,927 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:25,927 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:25,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2046793773, now seen corresponding path program 84 times [2022-04-06 21:00:25,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:25,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974561892] [2022-04-06 21:00:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:25,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:25,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:25,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:26,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:26,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974561892] [2022-04-06 21:00:26,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974561892] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:26,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662606693] [2022-04-06 21:00:26,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:26,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:26,035 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 21:00:26,036 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 21:00:26,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:00:26,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:26,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:00:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:26,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:26,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662606693] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:26,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:26,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-04-06 21:00:26,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:26,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [954577699] [2022-04-06 21:00:26,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [954577699] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:26,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:26,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:00:26,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260370097] [2022-04-06 21:00:26,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:26,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:00:26,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:00:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:00:26,277 INFO L87 Difference]: Start difference. First operand 375 states and 428 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:00:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:26,617 INFO L93 Difference]: Finished difference Result 409 states and 468 transitions. [2022-04-06 21:00:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:00:26,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-04-06 21:00:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:26,619 INFO L225 Difference]: With dead ends: 409 [2022-04-06 21:00:26,619 INFO L226 Difference]: Without dead ends: 382 [2022-04-06 21:00:26,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:00:26,625 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 89 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:26,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 60 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:00:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-06 21:00:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-04-06 21:00:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-04-06 21:00:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 435 transitions. [2022-04-06 21:00:26,788 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 435 transitions. Word has length 48 [2022-04-06 21:00:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:26,788 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 435 transitions. [2022-04-06 21:00:26,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:00:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 435 transitions. [2022-04-06 21:00:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:00:26,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:26,792 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:26,826 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 21:00:27,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:27,006 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1121658739, now seen corresponding path program 85 times [2022-04-06 21:00:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:27,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [520511828] [2022-04-06 21:00:27,007 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:27,007 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1121658739, now seen corresponding path program 86 times [2022-04-06 21:00:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:27,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652556442] [2022-04-06 21:00:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:27,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:27,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:27,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:27,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:00:27,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:27,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652556442] [2022-04-06 21:00:27,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652556442] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:27,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943716671] [2022-04-06 21:00:27,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:27,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:27,459 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 21:00:27,470 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 21:00:27,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:27,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:27,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:00:27,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:00:27,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:00:28,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943716671] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:28,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:28,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 37 [2022-04-06 21:00:28,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:28,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [520511828] [2022-04-06 21:00:28,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [520511828] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:28,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:28,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:00:28,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476586026] [2022-04-06 21:00:28,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:28,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:00:28,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:28,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:00:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:00:28,033 INFO L87 Difference]: Start difference. First operand 382 states and 435 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:29,874 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-04-06 21:00:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:00:29,875 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-06 21:00:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:29,877 INFO L225 Difference]: With dead ends: 460 [2022-04-06 21:00:29,877 INFO L226 Difference]: Without dead ends: 454 [2022-04-06 21:00:29,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=4064, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:00:29,880 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 195 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3738 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:29,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 231 Invalid, 3782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3738 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:00:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-04-06 21:00:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 398. [2022-04-06 21:00:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 341 states have (on average 1.1642228739002933) internal successors, (397), 373 states have internal predecessors, (397), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-04-06 21:00:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2022-04-06 21:00:30,009 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 49 [2022-04-06 21:00:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:30,009 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2022-04-06 21:00:30,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2022-04-06 21:00:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:00:30,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:30,012 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:30,029 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 21:00:30,215 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,SelfDestructingSolverStorable52 [2022-04-06 21:00:30,215 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1142562995, now seen corresponding path program 87 times [2022-04-06 21:00:30,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:30,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1639774945] [2022-04-06 21:00:30,216 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:30,216 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:30,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1142562995, now seen corresponding path program 88 times [2022-04-06 21:00:30,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:30,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707264885] [2022-04-06 21:00:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:30,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:30,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:30,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:30,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:00:30,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:30,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707264885] [2022-04-06 21:00:30,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707264885] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:30,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347872992] [2022-04-06 21:00:30,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:30,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:30,616 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 21:00:30,616 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 21:00:30,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:30,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:30,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:00:30,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:00:30,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:00:31,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347872992] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:31,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:31,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 37 [2022-04-06 21:00:31,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1639774945] [2022-04-06 21:00:31,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1639774945] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:31,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:31,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:00:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504260444] [2022-04-06 21:00:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:31,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:00:31,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:31,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:00:31,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:00:31,092 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:32,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:32,454 INFO L93 Difference]: Finished difference Result 404 states and 459 transitions. [2022-04-06 21:00:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:00:32,454 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-06 21:00:32,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:32,456 INFO L225 Difference]: With dead ends: 404 [2022-04-06 21:00:32,456 INFO L226 Difference]: Without dead ends: 382 [2022-04-06 21:00:32,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=3804, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 21:00:32,459 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:32,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 206 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2854 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 21:00:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-06 21:00:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-04-06 21:00:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2022-04-06 21:00:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 436 transitions. [2022-04-06 21:00:32,598 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 436 transitions. Word has length 49 [2022-04-06 21:00:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:32,598 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 436 transitions. [2022-04-06 21:00:32,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 436 transitions. [2022-04-06 21:00:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:00:32,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:32,600 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:32,616 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 21:00:32,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:32,815 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash 690493581, now seen corresponding path program 89 times [2022-04-06 21:00:32,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:32,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500698561] [2022-04-06 21:00:32,817 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:32,817 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:32,817 INFO L85 PathProgramCache]: Analyzing trace with hash 690493581, now seen corresponding path program 90 times [2022-04-06 21:00:32,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:32,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100456755] [2022-04-06 21:00:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:32,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:32,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:32,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:32,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:33,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:33,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100456755] [2022-04-06 21:00:33,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100456755] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875577059] [2022-04-06 21:00:33,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:33,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:33,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:33,187 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 21:00:33,188 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 21:00:33,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:00:33,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 21:00:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:33,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:33,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875577059] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:33,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:33,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 37 [2022-04-06 21:00:33,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:33,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500698561] [2022-04-06 21:00:33,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500698561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:33,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:33,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:00:33,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419801077] [2022-04-06 21:00:33,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:33,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:00:33,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:33,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:00:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:00:33,904 INFO L87 Difference]: Start difference. First operand 382 states and 436 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:35,035 INFO L93 Difference]: Finished difference Result 388 states and 441 transitions. [2022-04-06 21:00:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:00:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-06 21:00:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:35,037 INFO L225 Difference]: With dead ends: 388 [2022-04-06 21:00:35,037 INFO L226 Difference]: Without dead ends: 364 [2022-04-06 21:00:35,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=230, Invalid=3552, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 21:00:35,040 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:35,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 176 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:00:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-04-06 21:00:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-04-06 21:00:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 313 states have (on average 1.1661341853035143) internal successors, (365), 341 states have internal predecessors, (365), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2022-04-06 21:00:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 416 transitions. [2022-04-06 21:00:35,153 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 416 transitions. Word has length 49 [2022-04-06 21:00:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:35,154 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 416 transitions. [2022-04-06 21:00:35,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 416 transitions. [2022-04-06 21:00:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:00:35,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:35,157 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:35,176 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 21:00:35,371 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,SelfDestructingSolverStorable54 [2022-04-06 21:00:35,371 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash 375234381, now seen corresponding path program 91 times [2022-04-06 21:00:35,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:35,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [42847607] [2022-04-06 21:00:35,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:35,372 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash 375234381, now seen corresponding path program 92 times [2022-04-06 21:00:35,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:35,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49225267] [2022-04-06 21:00:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:35,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:35,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:35,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:35,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:00:35,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49225267] [2022-04-06 21:00:35,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49225267] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318228916] [2022-04-06 21:00:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:35,699 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 21:00:35,701 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 21:00:35,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:35,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:35,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 21:00:35,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:00:36,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:00:36,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318228916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:36,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:36,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 37 [2022-04-06 21:00:36,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:36,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [42847607] [2022-04-06 21:00:36,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [42847607] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:36,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:36,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:00:36,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821755191] [2022-04-06 21:00:36,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:36,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:00:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:36,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:00:36,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:00:36,468 INFO L87 Difference]: Start difference. First operand 364 states and 416 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:37,184 INFO L93 Difference]: Finished difference Result 382 states and 437 transitions. [2022-04-06 21:00:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:00:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-06 21:00:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:37,187 INFO L225 Difference]: With dead ends: 382 [2022-04-06 21:00:37,187 INFO L226 Difference]: Without dead ends: 376 [2022-04-06 21:00:37,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=232, Invalid=3308, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 21:00:37,190 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:37,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 143 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:00:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-04-06 21:00:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2022-04-06 21:00:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 320 states have (on average 1.16875) internal successors, (374), 350 states have internal predecessors, (374), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2022-04-06 21:00:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 429 transitions. [2022-04-06 21:00:37,295 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 429 transitions. Word has length 49 [2022-04-06 21:00:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:37,295 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 429 transitions. [2022-04-06 21:00:37,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 429 transitions. [2022-04-06 21:00:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:00:37,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:37,298 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:37,317 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 21:00:37,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:37,515 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1431154964, now seen corresponding path program 93 times [2022-04-06 21:00:37,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:37,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [626391291] [2022-04-06 21:00:37,516 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:37,516 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1431154964, now seen corresponding path program 94 times [2022-04-06 21:00:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053070303] [2022-04-06 21:00:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:37,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:37,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:37,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:37,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:37,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053070303] [2022-04-06 21:00:37,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053070303] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291248292] [2022-04-06 21:00:37,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:37,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:37,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:37,771 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 21:00:37,771 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 21:00:37,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 21:00:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:38,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:39,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291248292] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:39,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:39,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-04-06 21:00:39,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:39,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [626391291] [2022-04-06 21:00:39,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [626391291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:39,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:39,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:00:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713459153] [2022-04-06 21:00:39,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:39,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:00:39,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:39,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:00:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:00:39,059 INFO L87 Difference]: Start difference. First operand 374 states and 429 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:40,522 INFO L93 Difference]: Finished difference Result 442 states and 510 transitions. [2022-04-06 21:00:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:00:40,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 21:00:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:40,526 INFO L225 Difference]: With dead ends: 442 [2022-04-06 21:00:40,526 INFO L226 Difference]: Without dead ends: 428 [2022-04-06 21:00:40,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=308, Invalid=5094, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 21:00:40,529 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 190 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:40,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 193 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:00:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-04-06 21:00:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 419. [2022-04-06 21:00:40,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 359 states have (on average 1.1671309192200556) internal successors, (419), 393 states have internal predecessors, (419), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2022-04-06 21:00:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 482 transitions. [2022-04-06 21:00:40,655 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 482 transitions. Word has length 50 [2022-04-06 21:00:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:40,655 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 482 transitions. [2022-04-06 21:00:40,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 482 transitions. [2022-04-06 21:00:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:00:40,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:40,658 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:40,687 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 21:00:40,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:40,874 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:40,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:40,874 INFO L85 PathProgramCache]: Analyzing trace with hash -522394929, now seen corresponding path program 95 times [2022-04-06 21:00:40,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:40,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1218248294] [2022-04-06 21:00:40,875 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:40,875 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash -522394929, now seen corresponding path program 96 times [2022-04-06 21:00:40,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:40,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380407200] [2022-04-06 21:00:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:40,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:40,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:40,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:41,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 21:00:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:41,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:41,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380407200] [2022-04-06 21:00:41,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380407200] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:41,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043187459] [2022-04-06 21:00:41,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:41,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:41,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:41,186 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 21:00:41,187 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 21:00:41,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:00:41,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:41,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 21:00:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:41,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:00:42,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043187459] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:42,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:42,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-04-06 21:00:42,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:42,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1218248294] [2022-04-06 21:00:42,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1218248294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:42,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:42,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:00:42,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794996196] [2022-04-06 21:00:42,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:42,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:00:42,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:42,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:00:42,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:00:42,295 INFO L87 Difference]: Start difference. First operand 419 states and 482 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:43,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:43,718 INFO L93 Difference]: Finished difference Result 434 states and 497 transitions. [2022-04-06 21:00:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:00:43,718 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 21:00:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:43,720 INFO L225 Difference]: With dead ends: 434 [2022-04-06 21:00:43,720 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 21:00:43,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=308, Invalid=5094, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 21:00:43,723 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 197 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2781 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:43,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 200 Invalid, 2804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2781 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 21:00:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 21:00:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-04-06 21:00:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 360 states have (on average 1.1666666666666667) internal successors, (420), 394 states have internal predecessors, (420), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-06 21:00:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 480 transitions. [2022-04-06 21:00:43,850 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 480 transitions. Word has length 50 [2022-04-06 21:00:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:43,850 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 480 transitions. [2022-04-06 21:00:43,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 480 transitions. [2022-04-06 21:00:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:00:43,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:43,853 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:43,871 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 21:00:44,069 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-04-06 21:00:44,069 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash 96500781, now seen corresponding path program 97 times [2022-04-06 21:00:44,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:44,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [275536698] [2022-04-06 21:00:44,070 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:44,070 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash 96500781, now seen corresponding path program 98 times [2022-04-06 21:00:44,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:44,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383761362] [2022-04-06 21:00:44,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:44,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:44,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:44,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:44,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:44,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:44,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383761362] [2022-04-06 21:00:44,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383761362] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:44,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312043163] [2022-04-06 21:00:44,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:44,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:44,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:44,167 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 21:00:44,215 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 21:00:44,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:44,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:00:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:44,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:44,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312043163] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:44,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:44,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-04-06 21:00:44,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:44,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [275536698] [2022-04-06 21:00:44,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [275536698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:44,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:44,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:00:44,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552427550] [2022-04-06 21:00:44,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:44,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:00:44,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:00:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:00:44,402 INFO L87 Difference]: Start difference. First operand 420 states and 480 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:00:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:44,810 INFO L93 Difference]: Finished difference Result 540 states and 625 transitions. [2022-04-06 21:00:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:00:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-04-06 21:00:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:44,812 INFO L225 Difference]: With dead ends: 540 [2022-04-06 21:00:44,812 INFO L226 Difference]: Without dead ends: 502 [2022-04-06 21:00:44,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 21:00:44,817 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:44,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 56 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:00:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-04-06 21:00:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2022-04-06 21:00:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 418 states have (on average 1.1650717703349283) internal successors, (487), 452 states have internal predecessors, (487), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-06 21:00:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 547 transitions. [2022-04-06 21:00:44,982 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 547 transitions. Word has length 50 [2022-04-06 21:00:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:44,982 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 547 transitions. [2022-04-06 21:00:44,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:00:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 547 transitions. [2022-04-06 21:00:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:00:44,985 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:44,985 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:45,004 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 21:00:45,201 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,SelfDestructingSolverStorable58 [2022-04-06 21:00:45,202 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2133989358, now seen corresponding path program 99 times [2022-04-06 21:00:45,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:45,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [33056956] [2022-04-06 21:00:45,203 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:45,203 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2133989358, now seen corresponding path program 100 times [2022-04-06 21:00:45,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:45,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603413277] [2022-04-06 21:00:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:45,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:45,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:45,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:45,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 21:00:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:45,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603413277] [2022-04-06 21:00:45,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603413277] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792210357] [2022-04-06 21:00:45,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:45,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:45,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:45,308 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 21:00:45,309 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 21:00:45,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:45,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:45,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:00:45,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:45,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 21:00:45,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792210357] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:45,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:45,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-04-06 21:00:45,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:45,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [33056956] [2022-04-06 21:00:45,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [33056956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:45,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:45,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:00:45,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308032915] [2022-04-06 21:00:45,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:45,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:00:45,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:00:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:00:45,581 INFO L87 Difference]: Start difference. First operand 478 states and 547 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:46,034 INFO L93 Difference]: Finished difference Result 857 states and 980 transitions. [2022-04-06 21:00:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:00:46,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 21:00:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:46,043 INFO L225 Difference]: With dead ends: 857 [2022-04-06 21:00:46,043 INFO L226 Difference]: Without dead ends: 560 [2022-04-06 21:00:46,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 21:00:46,046 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 85 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:46,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 62 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:00:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-04-06 21:00:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 536. [2022-04-06 21:00:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-06 21:00:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 614 transitions. [2022-04-06 21:00:46,238 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 614 transitions. Word has length 50 [2022-04-06 21:00:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:46,238 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 614 transitions. [2022-04-06 21:00:46,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 614 transitions. [2022-04-06 21:00:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:00:46,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:46,241 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:46,256 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 21:00:46,455 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,SelfDestructingSolverStorable59 [2022-04-06 21:00:46,455 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -33846038, now seen corresponding path program 101 times [2022-04-06 21:00:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:46,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531911575] [2022-04-06 21:00:46,456 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:46,456 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash -33846038, now seen corresponding path program 102 times [2022-04-06 21:00:46,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:46,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152902747] [2022-04-06 21:00:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:46,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:46,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:46,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 21:00:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:00:46,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:46,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152902747] [2022-04-06 21:00:46,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152902747] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:46,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504723047] [2022-04-06 21:00:46,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:46,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:46,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:46,968 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 21:00:46,968 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 21:00:47,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:00:47,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:47,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:00:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:00:47,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:00:47,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504723047] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:47,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:47,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 39 [2022-04-06 21:00:47,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531911575] [2022-04-06 21:00:47,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531911575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:47,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:47,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:00:47,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400118513] [2022-04-06 21:00:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:47,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:00:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:00:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:00:47,463 INFO L87 Difference]: Start difference. First operand 536 states and 614 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:49,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:49,091 INFO L93 Difference]: Finished difference Result 628 states and 719 transitions. [2022-04-06 21:00:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:00:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 21:00:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:49,095 INFO L225 Difference]: With dead ends: 628 [2022-04-06 21:00:49,095 INFO L226 Difference]: Without dead ends: 622 [2022-04-06 21:00:49,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=4592, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 21:00:49,098 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 219 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4540 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 4586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:49,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 253 Invalid, 4586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4540 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:00:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-04-06 21:00:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 552. [2022-04-06 21:00:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 489 states have (on average 1.16359918200409) internal successors, (569), 525 states have internal predecessors, (569), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2022-04-06 21:00:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 633 transitions. [2022-04-06 21:00:49,284 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 633 transitions. Word has length 51 [2022-04-06 21:00:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:49,285 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 633 transitions. [2022-04-06 21:00:49,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 633 transitions. [2022-04-06 21:00:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:00:49,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:49,287 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:49,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 21:00:49,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:49,495 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2139086154, now seen corresponding path program 103 times [2022-04-06 21:00:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:49,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [427718809] [2022-04-06 21:00:49,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:49,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2139086154, now seen corresponding path program 104 times [2022-04-06 21:00:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:49,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500990887] [2022-04-06 21:00:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:49,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:49,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:49,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:49,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 21:00:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:00:49,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:49,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500990887] [2022-04-06 21:00:49,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500990887] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:49,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837194227] [2022-04-06 21:00:49,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:49,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:49,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:49,918 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 21:00:49,919 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 21:00:49,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:49,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:49,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:00:49,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:00:50,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:00:50,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837194227] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:50,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:50,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 39 [2022-04-06 21:00:50,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:50,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [427718809] [2022-04-06 21:00:50,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [427718809] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:50,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:50,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:00:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564669965] [2022-04-06 21:00:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:50,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:00:50,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:00:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1393, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:00:50,640 INFO L87 Difference]: Start difference. First operand 552 states and 633 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:52,284 INFO L93 Difference]: Finished difference Result 558 states and 638 transitions. [2022-04-06 21:00:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:00:52,285 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 21:00:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:52,287 INFO L225 Difference]: With dead ends: 558 [2022-04-06 21:00:52,287 INFO L226 Difference]: Without dead ends: 536 [2022-04-06 21:00:52,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=240, Invalid=4316, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 21:00:52,290 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:52,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 223 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3408 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:00:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-04-06 21:00:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-04-06 21:00:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-04-06 21:00:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 615 transitions. [2022-04-06 21:00:52,496 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 615 transitions. Word has length 51 [2022-04-06 21:00:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:52,496 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 615 transitions. [2022-04-06 21:00:52,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 615 transitions. [2022-04-06 21:00:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:00:52,499 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:52,499 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:52,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 21:00:52,715 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,SelfDestructingSolverStorable61 [2022-04-06 21:00:52,716 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:52,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1318950550, now seen corresponding path program 105 times [2022-04-06 21:00:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:52,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1935535342] [2022-04-06 21:00:52,717 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:52,717 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1318950550, now seen corresponding path program 106 times [2022-04-06 21:00:52,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:52,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187270065] [2022-04-06 21:00:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:52,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:52,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:52,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 21:00:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:53,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:53,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187270065] [2022-04-06 21:00:53,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187270065] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:53,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041592945] [2022-04-06 21:00:53,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:53,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:53,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:53,140 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 21:00:53,140 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 21:00:53,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:53,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:53,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:00:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:53,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:00:53,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041592945] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:53,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:53,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 39 [2022-04-06 21:00:53,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1935535342] [2022-04-06 21:00:53,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1935535342] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:53,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:53,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:00:53,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933487309] [2022-04-06 21:00:53,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:53,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:00:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:53,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:00:53,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:00:53,912 INFO L87 Difference]: Start difference. First operand 536 states and 615 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:55,056 INFO L93 Difference]: Finished difference Result 542 states and 620 transitions. [2022-04-06 21:00:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:00:55,056 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 21:00:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:55,058 INFO L225 Difference]: With dead ends: 542 [2022-04-06 21:00:55,058 INFO L226 Difference]: Without dead ends: 518 [2022-04-06 21:00:55,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=4048, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:00:55,060 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 120 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:55,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 190 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:00:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-04-06 21:00:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-04-06 21:00:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 461 states have (on average 1.1648590021691974) internal successors, (537), 493 states have internal predecessors, (537), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2022-04-06 21:00:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 595 transitions. [2022-04-06 21:00:55,256 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 595 transitions. Word has length 51 [2022-04-06 21:00:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:55,256 INFO L478 AbstractCegarLoop]: Abstraction has 518 states and 595 transitions. [2022-04-06 21:00:55,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 595 transitions. [2022-04-06 21:00:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:00:55,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:55,258 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:55,276 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 21:00:55,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:55,472 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash -774418501, now seen corresponding path program 107 times [2022-04-06 21:00:55,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1478354384] [2022-04-06 21:00:55,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:55,473 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash -774418501, now seen corresponding path program 108 times [2022-04-06 21:00:55,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:55,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894675968] [2022-04-06 21:00:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:55,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:55,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:55,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 21:00:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 21:00:55,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:55,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894675968] [2022-04-06 21:00:55,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894675968] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:55,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448613250] [2022-04-06 21:00:55,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:55,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:55,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:55,696 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 21:00:55,699 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 21:00:55,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:00:55,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:55,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 21:00:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 21:00:56,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 21:00:56,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448613250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:56,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:56,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-04-06 21:00:56,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:56,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1478354384] [2022-04-06 21:00:56,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1478354384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:56,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:56,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:00:56,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247273683] [2022-04-06 21:00:56,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:56,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:00:56,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:00:56,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:00:56,535 INFO L87 Difference]: Start difference. First operand 518 states and 595 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:57,359 INFO L93 Difference]: Finished difference Result 590 states and 681 transitions. [2022-04-06 21:00:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:00:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 21:00:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:57,366 INFO L225 Difference]: With dead ends: 590 [2022-04-06 21:00:57,366 INFO L226 Difference]: Without dead ends: 573 [2022-04-06 21:00:57,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=2519, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:00:57,370 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 151 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:57,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 150 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:00:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-04-06 21:00:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2022-04-06 21:00:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 490 states have (on average 1.153061224489796) internal successors, (565), 536 states have internal predecessors, (565), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-04-06 21:00:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 651 transitions. [2022-04-06 21:00:57,616 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 651 transitions. Word has length 51 [2022-04-06 21:00:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:57,616 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 651 transitions. [2022-04-06 21:00:57,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:00:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 651 transitions. [2022-04-06 21:00:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:00:57,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:57,620 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:57,638 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 21:00:57,836 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:57,837 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash -103251766, now seen corresponding path program 109 times [2022-04-06 21:00:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:57,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [613373836] [2022-04-06 21:00:57,838 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:57,838 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -103251766, now seen corresponding path program 110 times [2022-04-06 21:00:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:57,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088660761] [2022-04-06 21:00:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:57,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:57,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:00:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 21:00:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:00:58,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:58,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088660761] [2022-04-06 21:00:58,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088660761] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:58,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476532207] [2022-04-06 21:00:58,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:58,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:58,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:58,174 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 21:00:58,174 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 21:00:58,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:58,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:58,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 21:00:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:00:58,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:00:58,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476532207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:58,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:58,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 39 [2022-04-06 21:00:58,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:58,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [613373836] [2022-04-06 21:00:58,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [613373836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:58,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:58,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:00:58,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002564221] [2022-04-06 21:00:58,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:58,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:00:58,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:00:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1385, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:00:58,940 INFO L87 Difference]: Start difference. First operand 568 states and 651 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:00,021 INFO L93 Difference]: Finished difference Result 586 states and 673 transitions. [2022-04-06 21:01:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:01:00,021 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 21:01:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:00,025 INFO L225 Difference]: With dead ends: 586 [2022-04-06 21:01:00,025 INFO L226 Difference]: Without dead ends: 569 [2022-04-06 21:01:00,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=244, Invalid=3788, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 21:01:00,028 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:00,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 163 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:01:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-04-06 21:01:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 564. [2022-04-06 21:01:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 486 states have (on average 1.1563786008230452) internal successors, (562), 532 states have internal predecessors, (562), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-04-06 21:01:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 648 transitions. [2022-04-06 21:01:00,212 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 648 transitions. Word has length 51 [2022-04-06 21:01:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:00,213 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 648 transitions. [2022-04-06 21:01:00,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 648 transitions. [2022-04-06 21:01:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:01:00,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:00,216 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:00,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 21:01:00,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:00,424 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2133704513, now seen corresponding path program 111 times [2022-04-06 21:01:00,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:00,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1002441198] [2022-04-06 21:01:00,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:00,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:00,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2133704513, now seen corresponding path program 112 times [2022-04-06 21:01:00,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:00,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303967152] [2022-04-06 21:01:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:00,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:00,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:00,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:00,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 21:01:00,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303967152] [2022-04-06 21:01:00,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303967152] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738564521] [2022-04-06 21:01:00,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:00,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:00,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:00,628 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 21:01:00,630 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 21:01:00,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:00,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:00,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 21:01:00,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 21:01:01,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 21:01:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738564521] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:01,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:01,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-04-06 21:01:01,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1002441198] [2022-04-06 21:01:01,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1002441198] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:01,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:01,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:01:01,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175760746] [2022-04-06 21:01:01,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:01,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:01:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:01:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:01:01,297 INFO L87 Difference]: Start difference. First operand 564 states and 648 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:02,008 INFO L93 Difference]: Finished difference Result 578 states and 661 transitions. [2022-04-06 21:01:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:01:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 21:01:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:02,011 INFO L225 Difference]: With dead ends: 578 [2022-04-06 21:01:02,012 INFO L226 Difference]: Without dead ends: 554 [2022-04-06 21:01:02,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=2519, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:01:02,015 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 170 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:02,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 134 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:01:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-04-06 21:01:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2022-04-06 21:01:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 474 states have (on average 1.1561181434599157) internal successors, (548), 520 states have internal predecessors, (548), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2022-04-06 21:01:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 628 transitions. [2022-04-06 21:01:02,220 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 628 transitions. Word has length 51 [2022-04-06 21:01:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:02,220 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 628 transitions. [2022-04-06 21:01:02,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 628 transitions. [2022-04-06 21:01:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:01:02,223 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:02,224 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:02,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 21:01:02,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:02,433 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:02,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2068699601, now seen corresponding path program 113 times [2022-04-06 21:01:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:02,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390093513] [2022-04-06 21:01:02,434 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:02,434 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:02,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2068699601, now seen corresponding path program 114 times [2022-04-06 21:01:02,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:02,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331714656] [2022-04-06 21:01:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:02,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:02,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:02,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 21:01:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:02,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:02,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331714656] [2022-04-06 21:01:02,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331714656] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:02,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015128556] [2022-04-06 21:01:02,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:02,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:02,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:02,715 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 21:01:02,716 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 21:01:02,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 21:01:02,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:02,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:01:02,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:03,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:03,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015128556] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:03,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:03,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-04-06 21:01:03,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:03,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390093513] [2022-04-06 21:01:03,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390093513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:03,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:03,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:01:03,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066027852] [2022-04-06 21:01:03,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:03,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:01:03,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:01:03,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 21:01:03,865 INFO L87 Difference]: Start difference. First operand 552 states and 628 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:05,899 INFO L93 Difference]: Finished difference Result 642 states and 735 transitions. [2022-04-06 21:01:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:01:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 21:01:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:05,905 INFO L225 Difference]: With dead ends: 642 [2022-04-06 21:01:05,905 INFO L226 Difference]: Without dead ends: 628 [2022-04-06 21:01:05,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=343, Invalid=6299, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 21:01:05,920 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 211 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3219 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:05,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 213 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3219 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:01:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-04-06 21:01:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 619. [2022-04-06 21:01:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 532 states have (on average 1.1541353383458646) internal successors, (614), 584 states have internal predecessors, (614), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2022-04-06 21:01:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 706 transitions. [2022-04-06 21:01:06,172 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 706 transitions. Word has length 52 [2022-04-06 21:01:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:06,172 INFO L478 AbstractCegarLoop]: Abstraction has 619 states and 706 transitions. [2022-04-06 21:01:06,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 706 transitions. [2022-04-06 21:01:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:01:06,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:06,186 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:06,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 21:01:06,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 21:01:06,398 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash 333057708, now seen corresponding path program 115 times [2022-04-06 21:01:06,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:06,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229175972] [2022-04-06 21:01:06,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:06,399 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:06,399 INFO L85 PathProgramCache]: Analyzing trace with hash 333057708, now seen corresponding path program 116 times [2022-04-06 21:01:06,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:06,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014266842] [2022-04-06 21:01:06,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:06,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:06,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:06,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:06,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:06,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014266842] [2022-04-06 21:01:06,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014266842] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471867847] [2022-04-06 21:01:06,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:06,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:06,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:06,768 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 21:01:06,769 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 21:01:06,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:06,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:06,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:01:06,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:07,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:08,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471867847] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:08,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:08,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-04-06 21:01:08,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:08,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229175972] [2022-04-06 21:01:08,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229175972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:08,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:08,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:01:08,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407618244] [2022-04-06 21:01:08,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:08,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:01:08,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:08,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:01:08,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 21:01:08,326 INFO L87 Difference]: Start difference. First operand 619 states and 706 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:10,377 INFO L93 Difference]: Finished difference Result 634 states and 721 transitions. [2022-04-06 21:01:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:01:10,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 21:01:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:10,381 INFO L225 Difference]: With dead ends: 634 [2022-04-06 21:01:10,381 INFO L226 Difference]: Without dead ends: 622 [2022-04-06 21:01:10,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=343, Invalid=6299, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 21:01:10,384 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 221 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3411 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:10,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 220 Invalid, 3436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3411 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:01:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-04-06 21:01:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2022-04-06 21:01:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 533 states have (on average 1.1538461538461537) internal successors, (615), 585 states have internal predecessors, (615), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-04-06 21:01:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 703 transitions. [2022-04-06 21:01:10,626 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 703 transitions. Word has length 52 [2022-04-06 21:01:10,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:10,626 INFO L478 AbstractCegarLoop]: Abstraction has 620 states and 703 transitions. [2022-04-06 21:01:10,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 703 transitions. [2022-04-06 21:01:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:01:10,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:10,631 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:10,651 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 21:01:10,846 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,SelfDestructingSolverStorable67 [2022-04-06 21:01:10,847 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash -765588306, now seen corresponding path program 117 times [2022-04-06 21:01:10,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:10,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [864703562] [2022-04-06 21:01:10,848 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:10,848 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash -765588306, now seen corresponding path program 118 times [2022-04-06 21:01:10,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:10,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482414453] [2022-04-06 21:01:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:10,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:10,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:10,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:10,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 21:01:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:10,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482414453] [2022-04-06 21:01:10,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482414453] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544887736] [2022-04-06 21:01:10,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:10,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:10,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:10,934 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 21:01:10,935 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 21:01:11,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:11,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 21:01:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:11,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:11,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544887736] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:11,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:11,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-04-06 21:01:11,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:11,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [864703562] [2022-04-06 21:01:11,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [864703562] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:11,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:11,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:01:11,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302081710] [2022-04-06 21:01:11,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:11,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:01:11,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:11,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:01:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:01:11,193 INFO L87 Difference]: Start difference. First operand 620 states and 703 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:11,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:11,703 INFO L93 Difference]: Finished difference Result 944 states and 1054 transitions. [2022-04-06 21:01:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:01:11,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 21:01:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:11,710 INFO L225 Difference]: With dead ends: 944 [2022-04-06 21:01:11,711 INFO L226 Difference]: Without dead ends: 617 [2022-04-06 21:01:11,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=1081, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 21:01:11,716 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:11,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 75 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:01:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-04-06 21:01:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 609. [2022-04-06 21:01:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 528 states have (on average 1.1477272727272727) internal successors, (606), 576 states have internal predecessors, (606), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-04-06 21:01:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 686 transitions. [2022-04-06 21:01:11,966 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 686 transitions. Word has length 52 [2022-04-06 21:01:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:11,966 INFO L478 AbstractCegarLoop]: Abstraction has 609 states and 686 transitions. [2022-04-06 21:01:11,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 686 transitions. [2022-04-06 21:01:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:01:11,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:11,969 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:11,987 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 21:01:12,182 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,SelfDestructingSolverStorable68 [2022-04-06 21:01:12,182 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash 295087821, now seen corresponding path program 119 times [2022-04-06 21:01:12,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:12,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [257182433] [2022-04-06 21:01:12,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:12,183 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash 295087821, now seen corresponding path program 120 times [2022-04-06 21:01:12,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:12,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005529381] [2022-04-06 21:01:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:12,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:12,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:12,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:12,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:12,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:12,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005529381] [2022-04-06 21:01:12,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005529381] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:12,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42859609] [2022-04-06 21:01:12,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:12,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:12,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:12,256 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 21:01:12,257 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 21:01:12,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:01:12,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 21:01:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:12,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:12,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42859609] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:12,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:12,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-04-06 21:01:12,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:12,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [257182433] [2022-04-06 21:01:12,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [257182433] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:12,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:12,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:01:12,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153378726] [2022-04-06 21:01:12,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:12,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:01:12,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:12,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:01:12,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:01:12,545 INFO L87 Difference]: Start difference. First operand 609 states and 686 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:01:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:13,026 INFO L93 Difference]: Finished difference Result 651 states and 736 transitions. [2022-04-06 21:01:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:01:13,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-04-06 21:01:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:13,029 INFO L225 Difference]: With dead ends: 651 [2022-04-06 21:01:13,029 INFO L226 Difference]: Without dead ends: 618 [2022-04-06 21:01:13,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=479, Invalid=1081, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 21:01:13,034 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 114 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:13,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 62 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:01:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-04-06 21:01:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-04-06 21:01:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-04-06 21:01:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 695 transitions. [2022-04-06 21:01:13,282 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 695 transitions. Word has length 52 [2022-04-06 21:01:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:13,282 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 695 transitions. [2022-04-06 21:01:13,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:01:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 695 transitions. [2022-04-06 21:01:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:01:13,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:13,289 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:13,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 21:01:13,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:13,505 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash 715381933, now seen corresponding path program 121 times [2022-04-06 21:01:13,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:13,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665055804] [2022-04-06 21:01:13,506 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:13,506 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:13,506 INFO L85 PathProgramCache]: Analyzing trace with hash 715381933, now seen corresponding path program 122 times [2022-04-06 21:01:13,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:13,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003454607] [2022-04-06 21:01:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:13,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:13,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:13,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:13,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:01:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003454607] [2022-04-06 21:01:14,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003454607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943946300] [2022-04-06 21:01:14,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:14,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:14,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:14,090 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 21:01:14,091 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 21:01:14,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:14,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:01:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:01:14,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:01:14,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943946300] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:14,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:14,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 41 [2022-04-06 21:01:14,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:14,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665055804] [2022-04-06 21:01:14,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665055804] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:14,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:14,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:01:14,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674900053] [2022-04-06 21:01:14,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:14,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:01:14,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:14,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:01:14,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1551, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:01:14,732 INFO L87 Difference]: Start difference. First operand 618 states and 695 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:16,530 INFO L93 Difference]: Finished difference Result 718 states and 808 transitions. [2022-04-06 21:01:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:01:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-04-06 21:01:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:16,535 INFO L225 Difference]: With dead ends: 718 [2022-04-06 21:01:16,535 INFO L226 Difference]: Without dead ends: 712 [2022-04-06 21:01:16,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=5152, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 21:01:16,542 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 240 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 5288 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 5338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 5288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:16,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 271 Invalid, 5338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 5288 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 21:01:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-04-06 21:01:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 634. [2022-04-06 21:01:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 600 states have internal predecessors, (630), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2022-04-06 21:01:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 714 transitions. [2022-04-06 21:01:16,809 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 714 transitions. Word has length 53 [2022-04-06 21:01:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:16,809 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 714 transitions. [2022-04-06 21:01:16,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 714 transitions. [2022-04-06 21:01:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:01:16,813 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:16,813 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:16,851 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 21:01:17,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:17,029 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash -839303187, now seen corresponding path program 123 times [2022-04-06 21:01:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:17,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139991629] [2022-04-06 21:01:17,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:17,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:17,030 INFO L85 PathProgramCache]: Analyzing trace with hash -839303187, now seen corresponding path program 124 times [2022-04-06 21:01:17,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:17,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039226906] [2022-04-06 21:01:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:17,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:17,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:17,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:17,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:01:17,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:17,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039226906] [2022-04-06 21:01:17,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039226906] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:17,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881196582] [2022-04-06 21:01:17,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:17,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:17,518 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 21:01:17,552 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 21:01:17,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:17,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:17,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:01:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:01:18,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:01:18,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881196582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:18,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:18,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 41 [2022-04-06 21:01:18,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:18,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139991629] [2022-04-06 21:01:18,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139991629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:18,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:18,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:01:18,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51215795] [2022-04-06 21:01:18,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:18,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:01:18,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:01:18,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1547, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:01:18,202 INFO L87 Difference]: Start difference. First operand 634 states and 714 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:20,042 INFO L93 Difference]: Finished difference Result 640 states and 719 transitions. [2022-04-06 21:01:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:01:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-04-06 21:01:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:20,045 INFO L225 Difference]: With dead ends: 640 [2022-04-06 21:01:20,045 INFO L226 Difference]: Without dead ends: 618 [2022-04-06 21:01:20,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=252, Invalid=4860, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 21:01:20,050 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 173 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4244 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:20,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 246 Invalid, 4279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4244 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 21:01:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-04-06 21:01:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-04-06 21:01:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2022-04-06 21:01:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 696 transitions. [2022-04-06 21:01:20,267 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 696 transitions. Word has length 53 [2022-04-06 21:01:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:20,268 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 696 transitions. [2022-04-06 21:01:20,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 696 transitions. [2022-04-06 21:01:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:01:20,271 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:20,271 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:20,287 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 21:01:20,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:20,486 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 886283437, now seen corresponding path program 125 times [2022-04-06 21:01:20,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:20,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178972781] [2022-04-06 21:01:20,487 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:20,487 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 886283437, now seen corresponding path program 126 times [2022-04-06 21:01:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:20,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244159035] [2022-04-06 21:01:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:20,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:20,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:20,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:01:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244159035] [2022-04-06 21:01:20,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244159035] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069708400] [2022-04-06 21:01:20,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:20,884 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 21:01:20,885 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 21:01:20,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:01:20,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:01:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:01:21,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:01:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069708400] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:21,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:21,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 41 [2022-04-06 21:01:21,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178972781] [2022-04-06 21:01:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178972781] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:21,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:21,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:01:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285489023] [2022-04-06 21:01:21,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:21,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:01:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:01:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:01:21,511 INFO L87 Difference]: Start difference. First operand 618 states and 696 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:22,769 INFO L93 Difference]: Finished difference Result 624 states and 701 transitions. [2022-04-06 21:01:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:01:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-04-06 21:01:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:22,772 INFO L225 Difference]: With dead ends: 624 [2022-04-06 21:01:22,772 INFO L226 Difference]: Without dead ends: 600 [2022-04-06 21:01:22,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=254, Invalid=4576, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 21:01:22,777 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3132 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:22,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 216 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3132 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:01:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-04-06 21:01:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2022-04-06 21:01:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 522 states have (on average 1.1455938697318007) internal successors, (598), 568 states have internal predecessors, (598), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2022-04-06 21:01:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 676 transitions. [2022-04-06 21:01:23,016 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 676 transitions. Word has length 53 [2022-04-06 21:01:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:23,016 INFO L478 AbstractCegarLoop]: Abstraction has 600 states and 676 transitions. [2022-04-06 21:01:23,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 676 transitions. [2022-04-06 21:01:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:01:23,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:23,019 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:23,037 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 21:01:23,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:23,235 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:23,235 INFO L85 PathProgramCache]: Analyzing trace with hash -537493523, now seen corresponding path program 127 times [2022-04-06 21:01:23,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:23,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139048564] [2022-04-06 21:01:23,236 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:23,236 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:23,236 INFO L85 PathProgramCache]: Analyzing trace with hash -537493523, now seen corresponding path program 128 times [2022-04-06 21:01:23,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:23,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350115431] [2022-04-06 21:01:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:23,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:23,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:23,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:23,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:01:23,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350115431] [2022-04-06 21:01:23,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350115431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086830022] [2022-04-06 21:01:23,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:23,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:23,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:23,624 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 21:01:23,625 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 21:01:23,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:23,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:23,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:01:23,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:01:24,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:01:24,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086830022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:24,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:24,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 41 [2022-04-06 21:01:24,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:24,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139048564] [2022-04-06 21:01:24,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139048564] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:24,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:24,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:01:24,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995985780] [2022-04-06 21:01:24,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:24,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:01:24,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:01:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1539, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:01:24,380 INFO L87 Difference]: Start difference. First operand 600 states and 676 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:25,364 INFO L93 Difference]: Finished difference Result 606 states and 681 transitions. [2022-04-06 21:01:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:01:25,364 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-04-06 21:01:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:25,366 INFO L225 Difference]: With dead ends: 606 [2022-04-06 21:01:25,366 INFO L226 Difference]: Without dead ends: 580 [2022-04-06 21:01:25,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=256, Invalid=4300, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 21:01:25,369 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:25,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 186 Invalid, 2172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:01:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-04-06 21:01:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-04-06 21:01:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 505 states have (on average 1.1465346534653464) internal successors, (579), 549 states have internal predecessors, (579), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2022-04-06 21:01:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 654 transitions. [2022-04-06 21:01:25,574 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 654 transitions. Word has length 53 [2022-04-06 21:01:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:25,574 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 654 transitions. [2022-04-06 21:01:25,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 654 transitions. [2022-04-06 21:01:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:01:25,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:25,577 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:25,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 21:01:25,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:25,791 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1906924717, now seen corresponding path program 129 times [2022-04-06 21:01:25,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:25,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [90294572] [2022-04-06 21:01:25,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:25,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:25,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1906924717, now seen corresponding path program 130 times [2022-04-06 21:01:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:25,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763649924] [2022-04-06 21:01:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:25,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:25,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:25,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:25,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:01:26,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:26,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763649924] [2022-04-06 21:01:26,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763649924] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:26,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136408911] [2022-04-06 21:01:26,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:26,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:26,156 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 21:01:26,157 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 21:01:26,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:26,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:26,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 21:01:26,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:01:26,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:01:27,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136408911] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:27,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:27,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2022-04-06 21:01:27,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:27,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [90294572] [2022-04-06 21:01:27,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [90294572] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:27,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:27,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:01:27,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621983560] [2022-04-06 21:01:27,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:27,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:01:27,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:27,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:01:27,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:01:27,047 INFO L87 Difference]: Start difference. First operand 580 states and 654 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:27,985 INFO L93 Difference]: Finished difference Result 598 states and 675 transitions. [2022-04-06 21:01:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:01:27,985 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-04-06 21:01:27,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:27,989 INFO L225 Difference]: With dead ends: 598 [2022-04-06 21:01:27,990 INFO L226 Difference]: Without dead ends: 592 [2022-04-06 21:01:27,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=4032, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:01:27,993 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:27,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 153 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:01:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-04-06 21:01:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 590. [2022-04-06 21:01:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 512 states have (on average 1.1484375) internal successors, (588), 558 states have internal predecessors, (588), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2022-04-06 21:01:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 667 transitions. [2022-04-06 21:01:28,209 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 667 transitions. Word has length 53 [2022-04-06 21:01:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:28,209 INFO L478 AbstractCegarLoop]: Abstraction has 590 states and 667 transitions. [2022-04-06 21:01:28,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:28,209 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 667 transitions. [2022-04-06 21:01:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 21:01:28,212 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:28,212 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:28,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 21:01:28,427 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,SelfDestructingSolverStorable74 [2022-04-06 21:01:28,427 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash -317468980, now seen corresponding path program 131 times [2022-04-06 21:01:28,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:28,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1210473703] [2022-04-06 21:01:28,428 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:28,428 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash -317468980, now seen corresponding path program 132 times [2022-04-06 21:01:28,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528011553] [2022-04-06 21:01:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:28,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:28,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:28,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:28,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:28,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528011553] [2022-04-06 21:01:28,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528011553] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104836384] [2022-04-06 21:01:28,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:28,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:28,809 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 21:01:28,811 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 21:01:28,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 21:01:28,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:28,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 21:01:28,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:29,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:30,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104836384] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:30,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:30,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-04-06 21:01:30,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:30,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1210473703] [2022-04-06 21:01:30,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1210473703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:30,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:30,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:01:30,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306461241] [2022-04-06 21:01:30,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:30,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:01:30,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:30,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:01:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 21:01:30,488 INFO L87 Difference]: Start difference. First operand 590 states and 667 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:32,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:32,558 INFO L93 Difference]: Finished difference Result 682 states and 776 transitions. [2022-04-06 21:01:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:01:32,559 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-04-06 21:01:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:32,566 INFO L225 Difference]: With dead ends: 682 [2022-04-06 21:01:32,566 INFO L226 Difference]: Without dead ends: 668 [2022-04-06 21:01:32,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=378, Invalid=7632, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:01:32,570 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 232 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3893 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 3921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:32,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 233 Invalid, 3921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3893 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 21:01:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-04-06 21:01:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 659. [2022-04-06 21:01:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 572 states have (on average 1.1468531468531469) internal successors, (656), 624 states have internal predecessors, (656), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2022-04-06 21:01:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 747 transitions. [2022-04-06 21:01:32,850 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 747 transitions. Word has length 54 [2022-04-06 21:01:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:32,850 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 747 transitions. [2022-04-06 21:01:32,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 747 transitions. [2022-04-06 21:01:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 21:01:32,854 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:32,854 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:32,872 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 21:01:33,070 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,SelfDestructingSolverStorable75 [2022-04-06 21:01:33,070 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1122563567, now seen corresponding path program 133 times [2022-04-06 21:01:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:33,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311822530] [2022-04-06 21:01:33,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:33,071 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1122563567, now seen corresponding path program 134 times [2022-04-06 21:01:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:33,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557934259] [2022-04-06 21:01:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:33,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:33,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:33,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:33,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 21:01:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:33,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:33,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557934259] [2022-04-06 21:01:33,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557934259] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:33,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330221386] [2022-04-06 21:01:33,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:33,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:33,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:33,477 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 21:01:33,477 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 21:01:33,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:33,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 21:01:33,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:34,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:01:34,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330221386] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:34,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:34,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-04-06 21:01:34,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:34,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311822530] [2022-04-06 21:01:34,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311822530] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:34,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:34,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:01:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955972336] [2022-04-06 21:01:34,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:34,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:01:34,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:34,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:01:34,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 21:01:34,772 INFO L87 Difference]: Start difference. First operand 659 states and 747 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:36,559 INFO L93 Difference]: Finished difference Result 674 states and 762 transitions. [2022-04-06 21:01:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:01:36,559 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-04-06 21:01:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:36,582 INFO L225 Difference]: With dead ends: 674 [2022-04-06 21:01:36,582 INFO L226 Difference]: Without dead ends: 662 [2022-04-06 21:01:36,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=378, Invalid=7632, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:01:36,586 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 243 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3938 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 3965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:36,586 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 235 Invalid, 3965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3938 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:01:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-04-06 21:01:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 660. [2022-04-06 21:01:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 573 states have (on average 1.1465968586387434) internal successors, (657), 625 states have internal predecessors, (657), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-04-06 21:01:36,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 744 transitions. [2022-04-06 21:01:36,835 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 744 transitions. Word has length 54 [2022-04-06 21:01:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:36,835 INFO L478 AbstractCegarLoop]: Abstraction has 660 states and 744 transitions. [2022-04-06 21:01:36,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 744 transitions. [2022-04-06 21:01:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 21:01:36,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:36,839 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:36,856 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 21:01:37,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 21:01:37,051 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:37,052 INFO L85 PathProgramCache]: Analyzing trace with hash 334260941, now seen corresponding path program 135 times [2022-04-06 21:01:37,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:37,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032173982] [2022-04-06 21:01:37,052 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:37,052 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:37,053 INFO L85 PathProgramCache]: Analyzing trace with hash 334260941, now seen corresponding path program 136 times [2022-04-06 21:01:37,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:37,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389895632] [2022-04-06 21:01:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:37,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:37,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:37,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:37,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:37,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:37,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389895632] [2022-04-06 21:01:37,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389895632] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:37,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477037487] [2022-04-06 21:01:37,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:37,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:37,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:37,135 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 21:01:37,136 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 21:01:37,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:37,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:01:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:37,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:37,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477037487] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:37,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:37,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-04-06 21:01:37,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:37,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032173982] [2022-04-06 21:01:37,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032173982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:37,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:37,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:01:37,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615049514] [2022-04-06 21:01:37,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:37,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:01:37,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:37,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:01:37,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:01:37,422 INFO L87 Difference]: Start difference. First operand 660 states and 744 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:01:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:38,062 INFO L93 Difference]: Finished difference Result 818 states and 933 transitions. [2022-04-06 21:01:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:01:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-04-06 21:01:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:38,067 INFO L225 Difference]: With dead ends: 818 [2022-04-06 21:01:38,068 INFO L226 Difference]: Without dead ends: 772 [2022-04-06 21:01:38,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 21:01:38,074 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:38,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 75 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:01:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-04-06 21:01:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 742. [2022-04-06 21:01:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 655 states have (on average 1.1450381679389312) internal successors, (750), 707 states have internal predecessors, (750), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-04-06 21:01:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 837 transitions. [2022-04-06 21:01:38,381 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 837 transitions. Word has length 54 [2022-04-06 21:01:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:38,381 INFO L478 AbstractCegarLoop]: Abstraction has 742 states and 837 transitions. [2022-04-06 21:01:38,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:01:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 837 transitions. [2022-04-06 21:01:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 21:01:38,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:38,386 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:38,403 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 21:01:38,601 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,SelfDestructingSolverStorable77 [2022-04-06 21:01:38,602 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1144517490, now seen corresponding path program 137 times [2022-04-06 21:01:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:38,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749129145] [2022-04-06 21:01:38,603 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:38,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:38,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1144517490, now seen corresponding path program 138 times [2022-04-06 21:01:38,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:38,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283176926] [2022-04-06 21:01:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:38,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:38,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:38,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:38,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 21:01:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:38,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283176926] [2022-04-06 21:01:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283176926] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542366940] [2022-04-06 21:01:38,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:38,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:38,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:38,707 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 21:01:38,707 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 21:01:38,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:01:38,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:38,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:01:38,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:38,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:01:39,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542366940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:39,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:39,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-04-06 21:01:39,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:39,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749129145] [2022-04-06 21:01:39,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749129145] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:39,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:39,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:01:39,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903089986] [2022-04-06 21:01:39,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:39,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:01:39,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:01:39,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:01:39,001 INFO L87 Difference]: Start difference. First operand 742 states and 837 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:39,698 INFO L93 Difference]: Finished difference Result 1298 states and 1460 transitions. [2022-04-06 21:01:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:01:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-04-06 21:01:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:39,711 INFO L225 Difference]: With dead ends: 1298 [2022-04-06 21:01:39,712 INFO L226 Difference]: Without dead ends: 854 [2022-04-06 21:01:39,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 21:01:39,717 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 89 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:39,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 79 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:01:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-04-06 21:01:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 824. [2022-04-06 21:01:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-04-06 21:01:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 930 transitions. [2022-04-06 21:01:40,041 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 930 transitions. Word has length 54 [2022-04-06 21:01:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:40,041 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 930 transitions. [2022-04-06 21:01:40,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 930 transitions. [2022-04-06 21:01:40,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:01:40,046 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:40,046 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:40,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 21:01:40,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:40,263 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:40,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:40,263 INFO L85 PathProgramCache]: Analyzing trace with hash -579740214, now seen corresponding path program 139 times [2022-04-06 21:01:40,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:40,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1592148030] [2022-04-06 21:01:40,264 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:40,264 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash -579740214, now seen corresponding path program 140 times [2022-04-06 21:01:40,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:40,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165809253] [2022-04-06 21:01:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:40,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:40,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:40,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:40,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 21:01:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:01:40,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165809253] [2022-04-06 21:01:40,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165809253] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667104592] [2022-04-06 21:01:40,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:40,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:40,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:40,848 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 21:01:40,849 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 21:01:40,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:40,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:40,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:01:40,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:01:41,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:01:41,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667104592] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:41,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:41,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 43 [2022-04-06 21:01:41,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:41,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1592148030] [2022-04-06 21:01:41,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1592148030] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:41,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:41,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:01:41,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157147319] [2022-04-06 21:01:41,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:41,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:01:41,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:01:41,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:01:41,503 INFO L87 Difference]: Start difference. First operand 824 states and 930 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:43,997 INFO L93 Difference]: Finished difference Result 940 states and 1061 transitions. [2022-04-06 21:01:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:01:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-06 21:01:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:44,003 INFO L225 Difference]: With dead ends: 940 [2022-04-06 21:01:44,003 INFO L226 Difference]: Without dead ends: 934 [2022-04-06 21:01:44,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=262, Invalid=5744, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 21:01:44,008 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 264 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 6226 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 6278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 6226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:44,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 293 Invalid, 6278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 6226 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 21:01:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-04-06 21:01:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 840. [2022-04-06 21:01:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 750 states have (on average 1.144) internal successors, (858), 804 states have internal predecessors, (858), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2022-04-06 21:01:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 949 transitions. [2022-04-06 21:01:44,349 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 949 transitions. Word has length 55 [2022-04-06 21:01:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:44,349 INFO L478 AbstractCegarLoop]: Abstraction has 840 states and 949 transitions. [2022-04-06 21:01:44,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 949 transitions. [2022-04-06 21:01:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:01:44,354 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:44,354 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:44,371 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 21:01:44,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:44,567 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2028236118, now seen corresponding path program 141 times [2022-04-06 21:01:44,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:44,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668084847] [2022-04-06 21:01:44,568 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:44,568 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2028236118, now seen corresponding path program 142 times [2022-04-06 21:01:44,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:44,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819204299] [2022-04-06 21:01:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:44,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:44,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:44,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:44,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 21:01:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:01:45,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819204299] [2022-04-06 21:01:45,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819204299] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943530965] [2022-04-06 21:01:45,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:45,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:45,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:45,083 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 21:01:45,084 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 21:01:45,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:45,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:45,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:01:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:01:45,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:01:45,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943530965] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:45,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:45,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 43 [2022-04-06 21:01:45,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668084847] [2022-04-06 21:01:45,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668084847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:45,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:45,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:01:45,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901927774] [2022-04-06 21:01:45,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:45,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:01:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:01:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1709, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:01:45,887 INFO L87 Difference]: Start difference. First operand 840 states and 949 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:47,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:47,665 INFO L93 Difference]: Finished difference Result 846 states and 954 transitions. [2022-04-06 21:01:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:01:47,669 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-06 21:01:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:47,673 INFO L225 Difference]: With dead ends: 846 [2022-04-06 21:01:47,673 INFO L226 Difference]: Without dead ends: 824 [2022-04-06 21:01:47,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=5436, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 21:01:47,678 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4910 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 4949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:47,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 263 Invalid, 4949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4910 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:01:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-04-06 21:01:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2022-04-06 21:01:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-04-06 21:01:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 931 transitions. [2022-04-06 21:01:48,028 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 931 transitions. Word has length 55 [2022-04-06 21:01:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:48,028 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 931 transitions. [2022-04-06 21:01:48,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 931 transitions. [2022-04-06 21:01:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:01:48,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:48,033 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:48,051 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 21:01:48,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:48,249 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:48,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1858987446, now seen corresponding path program 143 times [2022-04-06 21:01:48,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:48,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834504455] [2022-04-06 21:01:48,250 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:48,250 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1858987446, now seen corresponding path program 144 times [2022-04-06 21:01:48,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:48,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857600994] [2022-04-06 21:01:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:48,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:48,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:48,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:48,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 21:01:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:01:48,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:48,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857600994] [2022-04-06 21:01:48,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857600994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:48,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644117290] [2022-04-06 21:01:48,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:48,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:48,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:48,726 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 21:01:48,727 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 21:01:48,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:01:48,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:01:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:01:49,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:01:49,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644117290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:49,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:49,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 43 [2022-04-06 21:01:49,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:49,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834504455] [2022-04-06 21:01:49,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834504455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:49,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:49,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:01:49,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595807149] [2022-04-06 21:01:49,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:49,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:01:49,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:01:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:01:49,414 INFO L87 Difference]: Start difference. First operand 824 states and 931 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:51,178 INFO L93 Difference]: Finished difference Result 830 states and 936 transitions. [2022-04-06 21:01:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:01:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-06 21:01:51,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:51,182 INFO L225 Difference]: With dead ends: 830 [2022-04-06 21:01:51,182 INFO L226 Difference]: Without dead ends: 806 [2022-04-06 21:01:51,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=5136, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 21:01:51,188 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3714 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 3752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:51,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 233 Invalid, 3752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3714 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:01:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-04-06 21:01:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-04-06 21:01:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 722 states have (on average 1.1440443213296398) internal successors, (826), 772 states have internal predecessors, (826), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2022-04-06 21:01:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 911 transitions. [2022-04-06 21:01:51,570 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 911 transitions. Word has length 55 [2022-04-06 21:01:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:51,570 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 911 transitions. [2022-04-06 21:01:51,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 911 transitions. [2022-04-06 21:01:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:01:51,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:51,575 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:51,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 21:01:51,791 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,SelfDestructingSolverStorable81 [2022-04-06 21:01:51,792 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:51,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2070730282, now seen corresponding path program 145 times [2022-04-06 21:01:51,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:51,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [991735125] [2022-04-06 21:01:51,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:51,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2070730282, now seen corresponding path program 146 times [2022-04-06 21:01:51,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:51,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365851114] [2022-04-06 21:01:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:51,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:51,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:51,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:51,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 21:01:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:01:52,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:52,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365851114] [2022-04-06 21:01:52,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365851114] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:52,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903251261] [2022-04-06 21:01:52,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:52,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:52,221 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 21:01:52,221 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 21:01:52,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:52,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:01:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:01:52,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:01:53,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903251261] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:53,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:53,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 43 [2022-04-06 21:01:53,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:53,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [991735125] [2022-04-06 21:01:53,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [991735125] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:53,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:53,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:01:53,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654759755] [2022-04-06 21:01:53,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:53,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:01:53,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:01:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1701, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:01:53,113 INFO L87 Difference]: Start difference. First operand 806 states and 911 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:54,456 INFO L93 Difference]: Finished difference Result 812 states and 916 transitions. [2022-04-06 21:01:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:01:54,456 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-06 21:01:54,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:54,465 INFO L225 Difference]: With dead ends: 812 [2022-04-06 21:01:54,465 INFO L226 Difference]: Without dead ends: 786 [2022-04-06 21:01:54,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=268, Invalid=4844, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 21:01:54,470 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 120 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:54,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 200 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:01:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-04-06 21:01:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-04-06 21:01:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 705 states have (on average 1.1446808510638298) internal successors, (807), 753 states have internal predecessors, (807), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2022-04-06 21:01:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 889 transitions. [2022-04-06 21:01:54,832 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 889 transitions. Word has length 55 [2022-04-06 21:01:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:54,832 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 889 transitions. [2022-04-06 21:01:54,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 889 transitions. [2022-04-06 21:01:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:01:54,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:54,836 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:54,860 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 21:01:55,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:55,046 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash -827352577, now seen corresponding path program 147 times [2022-04-06 21:01:55,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:55,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1234363846] [2022-04-06 21:01:55,047 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:55,047 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:55,047 INFO L85 PathProgramCache]: Analyzing trace with hash -827352577, now seen corresponding path program 148 times [2022-04-06 21:01:55,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:55,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197787151] [2022-04-06 21:01:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:55,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:55,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:55,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:55,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 21:01:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 21:01:55,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:55,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197787151] [2022-04-06 21:01:55,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197787151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:55,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176464019] [2022-04-06 21:01:55,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:55,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:55,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:55,325 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 21:01:55,326 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 21:01:55,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:55,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:01:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 21:01:55,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 21:01:56,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176464019] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:56,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:56,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-04-06 21:01:56,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1234363846] [2022-04-06 21:01:56,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1234363846] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:56,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:56,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:01:56,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864902458] [2022-04-06 21:01:56,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:56,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:01:56,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:56,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:01:56,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:01:56,050 INFO L87 Difference]: Start difference. First operand 786 states and 889 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:57,216 INFO L93 Difference]: Finished difference Result 874 states and 995 transitions. [2022-04-06 21:01:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:01:57,216 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-06 21:01:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:57,230 INFO L225 Difference]: With dead ends: 874 [2022-04-06 21:01:57,231 INFO L226 Difference]: Without dead ends: 856 [2022-04-06 21:01:57,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=3385, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 21:01:57,236 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 185 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:57,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 167 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:01:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-04-06 21:01:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 851. [2022-04-06 21:01:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 743 states have (on average 1.135935397039031) internal successors, (844), 809 states have internal predecessors, (844), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-04-06 21:01:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 962 transitions. [2022-04-06 21:01:57,570 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 962 transitions. Word has length 55 [2022-04-06 21:01:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:57,570 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 962 transitions. [2022-04-06 21:01:57,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 962 transitions. [2022-04-06 21:01:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:01:57,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:57,575 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:57,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 21:01:57,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:57,791 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash -704555318, now seen corresponding path program 149 times [2022-04-06 21:01:57,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:57,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818187166] [2022-04-06 21:01:57,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:57,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash -704555318, now seen corresponding path program 150 times [2022-04-06 21:01:57,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:57,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863639200] [2022-04-06 21:01:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:57,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:57,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:01:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:57,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 21:01:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:01:58,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863639200] [2022-04-06 21:01:58,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863639200] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245974451] [2022-04-06 21:01:58,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:58,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:58,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:58,041 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 21:01:58,042 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 21:01:58,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:01:58,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:58,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:01:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:01:58,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:01:58,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245974451] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:58,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:58,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 43 [2022-04-06 21:01:58,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:58,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [818187166] [2022-04-06 21:01:58,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [818187166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:58,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:58,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:01:58,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253400036] [2022-04-06 21:01:58,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:58,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:01:58,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:58,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:01:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:01:58,924 INFO L87 Difference]: Start difference. First operand 851 states and 962 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:01:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:59,886 INFO L93 Difference]: Finished difference Result 869 states and 984 transitions. [2022-04-06 21:01:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:01:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-06 21:01:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:59,892 INFO L225 Difference]: With dead ends: 869 [2022-04-06 21:01:59,892 INFO L226 Difference]: Without dead ends: 851 [2022-04-06 21:01:59,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=4560, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 21:01:59,898 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:59,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 173 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:01:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-04-06 21:02:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 846. [2022-04-06 21:02:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 738 states have (on average 1.1382113821138211) internal successors, (840), 804 states have internal predecessors, (840), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-04-06 21:02:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 958 transitions. [2022-04-06 21:02:00,275 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 958 transitions. Word has length 55 [2022-04-06 21:02:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:00,275 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 958 transitions. [2022-04-06 21:02:00,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 958 transitions. [2022-04-06 21:02:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:02:00,283 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:00,283 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:00,301 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 21:02:00,499 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,SelfDestructingSolverStorable84 [2022-04-06 21:02:00,499 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:00,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:00,499 INFO L85 PathProgramCache]: Analyzing trace with hash -77183301, now seen corresponding path program 151 times [2022-04-06 21:02:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:00,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [77290967] [2022-04-06 21:02:00,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:00,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash -77183301, now seen corresponding path program 152 times [2022-04-06 21:02:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:00,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174950871] [2022-04-06 21:02:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:00,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:00,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:00,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 21:02:00,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:00,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174950871] [2022-04-06 21:02:00,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174950871] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:00,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96802102] [2022-04-06 21:02:00,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:00,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:00,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:00,777 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 21:02:00,778 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 21:02:00,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:00,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:00,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:02:00,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 21:02:01,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 21:02:01,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96802102] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:01,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:01,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-04-06 21:02:01,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [77290967] [2022-04-06 21:02:01,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [77290967] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:01,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:01,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:02:01,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133650828] [2022-04-06 21:02:01,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:01,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:02:01,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:01,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:02:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:02:01,716 INFO L87 Difference]: Start difference. First operand 846 states and 958 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:02,940 INFO L93 Difference]: Finished difference Result 860 states and 971 transitions. [2022-04-06 21:02:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:02:02,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-06 21:02:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:02,944 INFO L225 Difference]: With dead ends: 860 [2022-04-06 21:02:02,944 INFO L226 Difference]: Without dead ends: 834 [2022-04-06 21:02:02,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=3385, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 21:02:02,952 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 195 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:02,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 161 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:02:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-04-06 21:02:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 832. [2022-04-06 21:02:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 724 states have (on average 1.138121546961326) internal successors, (824), 790 states have internal predecessors, (824), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2022-04-06 21:02:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 934 transitions. [2022-04-06 21:02:03,312 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 934 transitions. Word has length 55 [2022-04-06 21:02:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:03,313 INFO L478 AbstractCegarLoop]: Abstraction has 832 states and 934 transitions. [2022-04-06 21:02:03,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 934 transitions. [2022-04-06 21:02:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 21:02:03,318 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:03,318 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:03,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 21:02:03,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:03,534 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:03,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:03,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1811549873, now seen corresponding path program 153 times [2022-04-06 21:02:03,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:03,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [683362566] [2022-04-06 21:02:03,535 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:03,535 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:03,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1811549873, now seen corresponding path program 154 times [2022-04-06 21:02:03,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:03,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890243823] [2022-04-06 21:02:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:03,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:03,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:03,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:03,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 21:02:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:03,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:03,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890243823] [2022-04-06 21:02:03,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890243823] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:03,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517854027] [2022-04-06 21:02:03,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:03,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:03,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:03,968 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:03,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 21:02:04,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:04,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 21:02:04,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:04,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:05,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517854027] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:05,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:05,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-04-06 21:02:05,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:05,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [683362566] [2022-04-06 21:02:05,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [683362566] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:05,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:05,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:02:05,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660224736] [2022-04-06 21:02:05,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:05,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:02:05,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:05,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:02:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 21:02:05,591 INFO L87 Difference]: Start difference. First operand 832 states and 934 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:08,145 INFO L93 Difference]: Finished difference Result 948 states and 1071 transitions. [2022-04-06 21:02:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:02:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-04-06 21:02:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:08,157 INFO L225 Difference]: With dead ends: 948 [2022-04-06 21:02:08,157 INFO L226 Difference]: Without dead ends: 934 [2022-04-06 21:02:08,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=413, Invalid=9093, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 21:02:08,163 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 253 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4631 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 4661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:08,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 253 Invalid, 4661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4631 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 21:02:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-04-06 21:02:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 925. [2022-04-06 21:02:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 805 states have (on average 1.1366459627329193) internal successors, (915), 879 states have internal predecessors, (915), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2022-04-06 21:02:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1041 transitions. [2022-04-06 21:02:08,575 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1041 transitions. Word has length 56 [2022-04-06 21:02:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:08,575 INFO L478 AbstractCegarLoop]: Abstraction has 925 states and 1041 transitions. [2022-04-06 21:02:08,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1041 transitions. [2022-04-06 21:02:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 21:02:08,581 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:08,581 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:08,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 21:02:08,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:08,797 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash -120213876, now seen corresponding path program 155 times [2022-04-06 21:02:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:08,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219693436] [2022-04-06 21:02:08,798 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:08,798 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash -120213876, now seen corresponding path program 156 times [2022-04-06 21:02:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:08,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967317804] [2022-04-06 21:02:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:08,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:08,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:08,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:08,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:09,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967317804] [2022-04-06 21:02:09,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967317804] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413218176] [2022-04-06 21:02:09,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:09,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:09,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:09,230 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:09,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 21:02:09,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:02:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:09,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 21:02:09,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:10,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:11,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413218176] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:11,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:11,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-04-06 21:02:11,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:11,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219693436] [2022-04-06 21:02:11,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219693436] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:11,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:11,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:02:11,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893000317] [2022-04-06 21:02:11,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:11,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:02:11,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:11,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:02:11,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 21:02:11,245 INFO L87 Difference]: Start difference. First operand 925 states and 1041 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:13,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:13,778 INFO L93 Difference]: Finished difference Result 940 states and 1056 transitions. [2022-04-06 21:02:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:02:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-04-06 21:02:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:13,782 INFO L225 Difference]: With dead ends: 940 [2022-04-06 21:02:13,782 INFO L226 Difference]: Without dead ends: 928 [2022-04-06 21:02:13,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=413, Invalid=9093, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 21:02:13,789 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 266 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4863 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 4892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:13,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 260 Invalid, 4892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 4863 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:02:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-04-06 21:02:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 926. [2022-04-06 21:02:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 806 states have (on average 1.1364764267990075) internal successors, (916), 880 states have internal predecessors, (916), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-04-06 21:02:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1037 transitions. [2022-04-06 21:02:14,176 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1037 transitions. Word has length 56 [2022-04-06 21:02:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:14,176 INFO L478 AbstractCegarLoop]: Abstraction has 926 states and 1037 transitions. [2022-04-06 21:02:14,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1037 transitions. [2022-04-06 21:02:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 21:02:14,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:14,182 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:14,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:14,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:14,395 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:14,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2099731086, now seen corresponding path program 157 times [2022-04-06 21:02:14,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:14,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926350081] [2022-04-06 21:02:14,396 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:14,396 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2099731086, now seen corresponding path program 158 times [2022-04-06 21:02:14,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:14,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096500683] [2022-04-06 21:02:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:14,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:14,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:14,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:14,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 21:02:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:14,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096500683] [2022-04-06 21:02:14,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096500683] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:14,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995527280] [2022-04-06 21:02:14,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:14,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:14,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:14,487 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:14,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 21:02:14,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:14,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:14,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:02:14,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:14,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:14,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995527280] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:14,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:14,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-04-06 21:02:14,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:14,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926350081] [2022-04-06 21:02:14,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926350081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:14,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:14,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:02:14,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562400936] [2022-04-06 21:02:14,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:14,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:02:14,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:14,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:02:14,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:02:14,697 INFO L87 Difference]: Start difference. First operand 926 states and 1037 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:15,457 INFO L93 Difference]: Finished difference Result 1404 states and 1549 transitions. [2022-04-06 21:02:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 21:02:15,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-04-06 21:02:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:15,471 INFO L225 Difference]: With dead ends: 1404 [2022-04-06 21:02:15,471 INFO L226 Difference]: Without dead ends: 925 [2022-04-06 21:02:15,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=743, Invalid=1707, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 21:02:15,480 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:15,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 79 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-04-06 21:02:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 917. [2022-04-06 21:02:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 803 states have (on average 1.13200498132005) internal successors, (909), 873 states have internal predecessors, (909), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-04-06 21:02:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1022 transitions. [2022-04-06 21:02:15,894 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1022 transitions. Word has length 56 [2022-04-06 21:02:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:15,894 INFO L478 AbstractCegarLoop]: Abstraction has 917 states and 1022 transitions. [2022-04-06 21:02:15,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1022 transitions. [2022-04-06 21:02:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 21:02:15,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:15,900 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:15,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:16,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-04-06 21:02:16,116 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:16,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1863657747, now seen corresponding path program 159 times [2022-04-06 21:02:16,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:16,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1435920817] [2022-04-06 21:02:16,117 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:16,117 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1863657747, now seen corresponding path program 160 times [2022-04-06 21:02:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:16,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299487314] [2022-04-06 21:02:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:16,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:16,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:16,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:16,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:16,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299487314] [2022-04-06 21:02:16,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299487314] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:16,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629247680] [2022-04-06 21:02:16,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:16,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:16,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:16,217 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:16,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 21:02:16,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:16,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:02:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:16,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:16,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629247680] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:16,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:16,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-04-06 21:02:16,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:16,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1435920817] [2022-04-06 21:02:16,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1435920817] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:16,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:16,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:02:16,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876747262] [2022-04-06 21:02:16,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:16,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:02:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:02:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:02:16,516 INFO L87 Difference]: Start difference. First operand 917 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:02:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:17,349 INFO L93 Difference]: Finished difference Result 967 states and 1082 transitions. [2022-04-06 21:02:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 21:02:17,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2022-04-06 21:02:17,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:17,352 INFO L225 Difference]: With dead ends: 967 [2022-04-06 21:02:17,352 INFO L226 Difference]: Without dead ends: 928 [2022-04-06 21:02:17,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=743, Invalid=1707, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 21:02:17,360 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 120 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:17,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 79 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-04-06 21:02:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-04-06 21:02:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-04-06 21:02:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1033 transitions. [2022-04-06 21:02:17,776 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1033 transitions. Word has length 56 [2022-04-06 21:02:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:17,776 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1033 transitions. [2022-04-06 21:02:17,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:02:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1033 transitions. [2022-04-06 21:02:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:02:17,782 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:17,782 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:17,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 21:02:17,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 21:02:17,998 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:17,998 INFO L85 PathProgramCache]: Analyzing trace with hash -451135283, now seen corresponding path program 161 times [2022-04-06 21:02:17,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:17,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [65531815] [2022-04-06 21:02:17,999 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:17,999 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash -451135283, now seen corresponding path program 162 times [2022-04-06 21:02:17,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:17,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164280785] [2022-04-06 21:02:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:17,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:18,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:18,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:18,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:02:18,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:18,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164280785] [2022-04-06 21:02:18,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164280785] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:18,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508835477] [2022-04-06 21:02:18,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:18,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:18,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:18,583 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:18,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 21:02:18,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:02:18,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:18,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:02:18,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:02:18,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:02:19,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508835477] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:19,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:19,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 45 [2022-04-06 21:02:19,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:19,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [65531815] [2022-04-06 21:02:19,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [65531815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:19,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:19,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:02:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8147841] [2022-04-06 21:02:19,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:19,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:02:19,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:02:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1883, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:02:19,213 INFO L87 Difference]: Start difference. First operand 928 states and 1033 transitions. Second operand has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:21,938 INFO L93 Difference]: Finished difference Result 1052 states and 1172 transitions. [2022-04-06 21:02:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:02:21,938 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-04-06 21:02:21,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:21,946 INFO L225 Difference]: With dead ends: 1052 [2022-04-06 21:02:21,946 INFO L226 Difference]: Without dead ends: 1046 [2022-04-06 21:02:21,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=6368, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 21:02:21,959 INFO L913 BasicCegarLoop]: 129 mSDtfsCounter, 285 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 7094 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 7150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 7094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:21,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 311 Invalid, 7150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 7094 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 21:02:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-04-06 21:02:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 944. [2022-04-06 21:02:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 827 states have (on average 1.1305925030229746) internal successors, (935), 899 states have internal predecessors, (935), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2022-04-06 21:02:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1052 transitions. [2022-04-06 21:02:22,394 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1052 transitions. Word has length 57 [2022-04-06 21:02:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:22,394 INFO L478 AbstractCegarLoop]: Abstraction has 944 states and 1052 transitions. [2022-04-06 21:02:22,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1052 transitions. [2022-04-06 21:02:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:02:22,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:22,400 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:22,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:22,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:22,616 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:22,617 INFO L85 PathProgramCache]: Analyzing trace with hash -866207603, now seen corresponding path program 163 times [2022-04-06 21:02:22,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:22,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [34254650] [2022-04-06 21:02:22,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:22,618 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash -866207603, now seen corresponding path program 164 times [2022-04-06 21:02:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:22,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511020892] [2022-04-06 21:02:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:22,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:22,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:22,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:22,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:02:23,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:23,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511020892] [2022-04-06 21:02:23,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511020892] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:23,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789839311] [2022-04-06 21:02:23,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:23,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:23,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:23,190 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:23,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 21:02:23,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:23,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:23,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:02:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:02:23,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:02:24,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789839311] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:24,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:24,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 45 [2022-04-06 21:02:24,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [34254650] [2022-04-06 21:02:24,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [34254650] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:24,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:24,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:02:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654672775] [2022-04-06 21:02:24,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:24,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:02:24,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:02:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1879, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:02:24,021 INFO L87 Difference]: Start difference. First operand 944 states and 1052 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:26,391 INFO L93 Difference]: Finished difference Result 950 states and 1057 transitions. [2022-04-06 21:02:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:02:26,391 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-04-06 21:02:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:26,395 INFO L225 Difference]: With dead ends: 950 [2022-04-06 21:02:26,395 INFO L226 Difference]: Without dead ends: 928 [2022-04-06 21:02:26,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=276, Invalid=6044, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 21:02:26,404 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5890 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 5929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:26,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 286 Invalid, 5929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 5890 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 21:02:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-04-06 21:02:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-04-06 21:02:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2022-04-06 21:02:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1034 transitions. [2022-04-06 21:02:26,855 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1034 transitions. Word has length 57 [2022-04-06 21:02:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:26,855 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1034 transitions. [2022-04-06 21:02:26,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1034 transitions. [2022-04-06 21:02:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:02:26,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:26,861 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:26,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:27,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-04-06 21:02:27,077 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:27,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1830582477, now seen corresponding path program 165 times [2022-04-06 21:02:27,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:27,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1805566889] [2022-04-06 21:02:27,078 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:27,078 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:27,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1830582477, now seen corresponding path program 166 times [2022-04-06 21:02:27,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:27,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070500105] [2022-04-06 21:02:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:27,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:27,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:27,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:27,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:02:27,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:27,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070500105] [2022-04-06 21:02:27,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070500105] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:27,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127315674] [2022-04-06 21:02:27,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:27,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:27,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:27,431 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:27,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 21:02:27,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:27,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:27,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:02:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:02:27,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:02:27,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127315674] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:27,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:27,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 45 [2022-04-06 21:02:27,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1805566889] [2022-04-06 21:02:27,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1805566889] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:27,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:27,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:02:27,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7650218] [2022-04-06 21:02:27,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:27,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:02:27,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:27,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:02:27,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1875, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:02:27,993 INFO L87 Difference]: Start difference. First operand 928 states and 1034 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:29,657 INFO L93 Difference]: Finished difference Result 934 states and 1039 transitions. [2022-04-06 21:02:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:02:29,657 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-04-06 21:02:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:29,661 INFO L225 Difference]: With dead ends: 934 [2022-04-06 21:02:29,661 INFO L226 Difference]: Without dead ends: 910 [2022-04-06 21:02:29,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=5728, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 21:02:29,696 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 173 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4594 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:29,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 256 Invalid, 4632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4594 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:02:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-04-06 21:02:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 910. [2022-04-06 21:02:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 799 states have (on average 1.130162703379224) internal successors, (903), 867 states have internal predecessors, (903), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (72), 37 states have call predecessors, (72), 37 states have call successors, (72) [2022-04-06 21:02:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1014 transitions. [2022-04-06 21:02:30,088 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1014 transitions. Word has length 57 [2022-04-06 21:02:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:30,088 INFO L478 AbstractCegarLoop]: Abstraction has 910 states and 1014 transitions. [2022-04-06 21:02:30,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1014 transitions. [2022-04-06 21:02:30,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:02:30,093 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:30,093 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:30,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 21:02:30,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:30,309 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:30,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:30,310 INFO L85 PathProgramCache]: Analyzing trace with hash -381847411, now seen corresponding path program 167 times [2022-04-06 21:02:30,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:30,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [863376312] [2022-04-06 21:02:30,310 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:30,310 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:30,311 INFO L85 PathProgramCache]: Analyzing trace with hash -381847411, now seen corresponding path program 168 times [2022-04-06 21:02:30,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:30,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022630755] [2022-04-06 21:02:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:30,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:30,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:30,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:30,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:02:30,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:30,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022630755] [2022-04-06 21:02:30,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022630755] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:30,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775539958] [2022-04-06 21:02:30,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:30,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:30,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:30,603 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:30,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 21:02:30,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:02:30,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:30,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:02:30,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:02:31,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:02:31,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775539958] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:31,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:31,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 45 [2022-04-06 21:02:31,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [863376312] [2022-04-06 21:02:31,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [863376312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:31,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:31,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:02:31,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293954150] [2022-04-06 21:02:31,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:31,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:02:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:31,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:02:31,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1871, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:02:31,240 INFO L87 Difference]: Start difference. First operand 910 states and 1014 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:32,611 INFO L93 Difference]: Finished difference Result 916 states and 1019 transitions. [2022-04-06 21:02:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:02:32,611 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-04-06 21:02:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:32,641 INFO L225 Difference]: With dead ends: 916 [2022-04-06 21:02:32,641 INFO L226 Difference]: Without dead ends: 890 [2022-04-06 21:02:32,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=5420, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 21:02:32,649 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3418 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:32,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 226 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3418 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:02:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-04-06 21:02:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2022-04-06 21:02:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 782 states have (on average 1.1304347826086956) internal successors, (884), 848 states have internal predecessors, (884), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (70), 36 states have call predecessors, (70), 36 states have call successors, (70) [2022-04-06 21:02:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 992 transitions. [2022-04-06 21:02:33,032 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 992 transitions. Word has length 57 [2022-04-06 21:02:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:33,032 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 992 transitions. [2022-04-06 21:02:33,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 992 transitions. [2022-04-06 21:02:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:02:33,037 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:33,037 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:33,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:33,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:33,254 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash -799098675, now seen corresponding path program 169 times [2022-04-06 21:02:33,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:33,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [201769195] [2022-04-06 21:02:33,255 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:33,255 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash -799098675, now seen corresponding path program 170 times [2022-04-06 21:02:33,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:33,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023694565] [2022-04-06 21:02:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:33,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:33,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:33,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:33,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:02:33,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023694565] [2022-04-06 21:02:33,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023694565] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287654471] [2022-04-06 21:02:33,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:33,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:33,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:33,595 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:33,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 21:02:33,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:33,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:02:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:02:34,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:02:34,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287654471] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:34,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:34,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 45 [2022-04-06 21:02:34,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:34,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [201769195] [2022-04-06 21:02:34,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [201769195] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:34,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:34,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:02:34,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789133753] [2022-04-06 21:02:34,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:34,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:02:34,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:02:34,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1867, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:02:34,512 INFO L87 Difference]: Start difference. First operand 890 states and 992 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:35,915 INFO L93 Difference]: Finished difference Result 896 states and 997 transitions. [2022-04-06 21:02:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:02:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-04-06 21:02:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:35,919 INFO L225 Difference]: With dead ends: 896 [2022-04-06 21:02:35,919 INFO L226 Difference]: Without dead ends: 868 [2022-04-06 21:02:35,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=282, Invalid=5120, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 21:02:35,931 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:35,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 196 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2362 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:02:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-04-06 21:02:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2022-04-06 21:02:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 763 states have (on average 1.1310615989515072) internal successors, (863), 827 states have internal predecessors, (863), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (68), 35 states have call predecessors, (68), 35 states have call successors, (68) [2022-04-06 21:02:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 968 transitions. [2022-04-06 21:02:36,403 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 968 transitions. Word has length 57 [2022-04-06 21:02:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:36,403 INFO L478 AbstractCegarLoop]: Abstraction has 868 states and 968 transitions. [2022-04-06 21:02:36,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 968 transitions. [2022-04-06 21:02:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:02:36,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:36,408 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:36,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:36,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:36,619 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash -589678451, now seen corresponding path program 171 times [2022-04-06 21:02:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:36,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272399539] [2022-04-06 21:02:36,622 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:36,622 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash -589678451, now seen corresponding path program 172 times [2022-04-06 21:02:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:36,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836274643] [2022-04-06 21:02:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:36,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:36,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:36,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:36,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:02:37,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:37,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836274643] [2022-04-06 21:02:37,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836274643] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:37,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66600036] [2022-04-06 21:02:37,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:37,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:37,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:37,018 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:37,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 21:02:37,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:37,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:02:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:02:37,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:02:37,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66600036] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:37,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:37,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 45 [2022-04-06 21:02:37,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:37,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272399539] [2022-04-06 21:02:37,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272399539] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:37,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:37,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:02:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296428825] [2022-04-06 21:02:37,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:37,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:02:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:02:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:02:37,937 INFO L87 Difference]: Start difference. First operand 868 states and 968 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:39,212 INFO L93 Difference]: Finished difference Result 886 states and 989 transitions. [2022-04-06 21:02:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:02:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-04-06 21:02:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:39,219 INFO L225 Difference]: With dead ends: 886 [2022-04-06 21:02:39,219 INFO L226 Difference]: Without dead ends: 880 [2022-04-06 21:02:39,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=284, Invalid=4828, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 21:02:39,227 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:39,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 163 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:02:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-04-06 21:02:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 878. [2022-04-06 21:02:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 770 states have (on average 1.1324675324675324) internal successors, (872), 836 states have internal predecessors, (872), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (71), 36 states have call predecessors, (71), 36 states have call successors, (71) [2022-04-06 21:02:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 981 transitions. [2022-04-06 21:02:39,637 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 981 transitions. Word has length 57 [2022-04-06 21:02:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:39,637 INFO L478 AbstractCegarLoop]: Abstraction has 878 states and 981 transitions. [2022-04-06 21:02:39,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 981 transitions. [2022-04-06 21:02:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 21:02:39,642 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:39,643 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:39,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 21:02:39,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:39,858 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2119764308, now seen corresponding path program 173 times [2022-04-06 21:02:39,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:39,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [298458025] [2022-04-06 21:02:39,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:39,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2119764308, now seen corresponding path program 174 times [2022-04-06 21:02:39,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:39,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796479163] [2022-04-06 21:02:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:39,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:39,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:39,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:40,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:40,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:40,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796479163] [2022-04-06 21:02:40,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796479163] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:40,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716694539] [2022-04-06 21:02:40,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:40,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:40,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:40,355 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:40,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 21:02:40,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:02:40,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:40,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:02:40,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:41,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:42,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716694539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:42,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:42,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-04-06 21:02:42,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:42,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [298458025] [2022-04-06 21:02:42,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [298458025] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:42,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:42,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:02:42,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743991974] [2022-04-06 21:02:42,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:42,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:02:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:42,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:02:42,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 21:02:42,697 INFO L87 Difference]: Start difference. First operand 878 states and 981 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:45,996 INFO L93 Difference]: Finished difference Result 996 states and 1120 transitions. [2022-04-06 21:02:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:02:45,996 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-04-06 21:02:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:46,012 INFO L225 Difference]: With dead ends: 996 [2022-04-06 21:02:46,012 INFO L226 Difference]: Without dead ends: 982 [2022-04-06 21:02:46,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=448, Invalid=10682, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 21:02:46,020 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 273 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5630 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 5662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 5630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:46,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 278 Invalid, 5662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 5630 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 21:02:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-04-06 21:02:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 973. [2022-04-06 21:02:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 853 states have (on average 1.1313012895662369) internal successors, (965), 927 states have internal predecessors, (965), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (83), 40 states have call predecessors, (83), 40 states have call successors, (83) [2022-04-06 21:02:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1090 transitions. [2022-04-06 21:02:46,486 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1090 transitions. Word has length 58 [2022-04-06 21:02:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:46,486 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1090 transitions. [2022-04-06 21:02:46,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1090 transitions. [2022-04-06 21:02:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 21:02:46,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:46,492 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:46,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:46,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:46,709 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:46,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:46,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1227955953, now seen corresponding path program 175 times [2022-04-06 21:02:46,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:46,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180455694] [2022-04-06 21:02:46,709 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:46,710 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:46,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1227955953, now seen corresponding path program 176 times [2022-04-06 21:02:46,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:46,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480710702] [2022-04-06 21:02:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:46,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:46,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:46,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:46,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:02:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:47,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:47,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480710702] [2022-04-06 21:02:47,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480710702] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:47,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536561148] [2022-04-06 21:02:47,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:47,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:47,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:47,196 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:47,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 21:02:47,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:47,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:02:47,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:48,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:02:49,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536561148] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:49,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:49,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-04-06 21:02:49,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:49,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180455694] [2022-04-06 21:02:49,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180455694] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:49,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:49,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:02:49,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801970703] [2022-04-06 21:02:49,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:49,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:02:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:02:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 21:02:49,459 INFO L87 Difference]: Start difference. First operand 973 states and 1090 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:51,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:51,814 INFO L93 Difference]: Finished difference Result 988 states and 1105 transitions. [2022-04-06 21:02:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:02:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-04-06 21:02:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:51,818 INFO L225 Difference]: With dead ends: 988 [2022-04-06 21:02:51,818 INFO L226 Difference]: Without dead ends: 976 [2022-04-06 21:02:51,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=448, Invalid=10682, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 21:02:51,826 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 287 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5685 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 5716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 5685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:51,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 280 Invalid, 5716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 5685 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:02:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-04-06 21:02:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2022-04-06 21:02:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 854 states have (on average 1.1311475409836065) internal successors, (966), 928 states have internal predecessors, (966), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-04-06 21:02:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1086 transitions. [2022-04-06 21:02:52,296 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1086 transitions. Word has length 58 [2022-04-06 21:02:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:52,296 INFO L478 AbstractCegarLoop]: Abstraction has 974 states and 1086 transitions. [2022-04-06 21:02:52,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1086 transitions. [2022-04-06 21:02:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 21:02:52,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:52,303 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:52,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 21:02:52,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-04-06 21:02:52,519 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash 248974061, now seen corresponding path program 177 times [2022-04-06 21:02:52,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:52,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266941533] [2022-04-06 21:02:52,520 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:52,520 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash 248974061, now seen corresponding path program 178 times [2022-04-06 21:02:52,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:52,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298610336] [2022-04-06 21:02:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:52,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:52,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:02:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:52,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:52,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298610336] [2022-04-06 21:02:52,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298610336] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:52,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870976995] [2022-04-06 21:02:52,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:52,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:52,637 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:52,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 21:02:52,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:52,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:02:52,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:52,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:52,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870976995] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:52,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:52,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-04-06 21:02:52,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:52,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266941533] [2022-04-06 21:02:52,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266941533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:52,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:52,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:02:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912685528] [2022-04-06 21:02:52,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:52,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:02:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:02:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:02:52,972 INFO L87 Difference]: Start difference. First operand 974 states and 1086 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:02:53,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:53,838 INFO L93 Difference]: Finished difference Result 1174 states and 1323 transitions. [2022-04-06 21:02:53,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:02:53,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-04-06 21:02:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:53,843 INFO L225 Difference]: With dead ends: 1174 [2022-04-06 21:02:53,843 INFO L226 Difference]: Without dead ends: 1120 [2022-04-06 21:02:53,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=878, Invalid=2544, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:02:53,853 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 94 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:53,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 89 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-04-06 21:02:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1084. [2022-04-06 21:02:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 964 states have (on average 1.129668049792531) internal successors, (1089), 1038 states have internal predecessors, (1089), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-04-06 21:02:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1209 transitions. [2022-04-06 21:02:54,379 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1209 transitions. Word has length 58 [2022-04-06 21:02:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:54,379 INFO L478 AbstractCegarLoop]: Abstraction has 1084 states and 1209 transitions. [2022-04-06 21:02:54,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:02:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1209 transitions. [2022-04-06 21:02:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 21:02:54,387 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:54,387 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:54,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 21:02:54,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-06 21:02:54,603 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1022687022, now seen corresponding path program 179 times [2022-04-06 21:02:54,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:54,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1607307313] [2022-04-06 21:02:54,604 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:54,604 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1022687022, now seen corresponding path program 180 times [2022-04-06 21:02:54,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:54,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806834697] [2022-04-06 21:02:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:54,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:54,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:54,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:02:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:54,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806834697] [2022-04-06 21:02:54,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806834697] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409142075] [2022-04-06 21:02:54,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:54,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:54,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:54,699 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:54,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 21:02:54,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:02:54,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:54,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:02:54,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:54,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:02:54,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409142075] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:54,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:54,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-04-06 21:02:54,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:54,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1607307313] [2022-04-06 21:02:54,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1607307313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:54,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:54,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:02:54,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445975217] [2022-04-06 21:02:54,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:54,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:02:54,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:54,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:02:54,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:02:54,986 INFO L87 Difference]: Start difference. First operand 1084 states and 1209 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:55,932 INFO L93 Difference]: Finished difference Result 1860 states and 2065 transitions. [2022-04-06 21:02:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:02:55,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-04-06 21:02:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:55,964 INFO L225 Difference]: With dead ends: 1860 [2022-04-06 21:02:55,964 INFO L226 Difference]: Without dead ends: 1230 [2022-04-06 21:02:55,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=878, Invalid=2544, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:02:55,976 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 123 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:55,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 61 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-04-06 21:02:56,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1194. [2022-04-06 21:02:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-04-06 21:02:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1332 transitions. [2022-04-06 21:02:56,556 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1332 transitions. Word has length 58 [2022-04-06 21:02:56,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:56,556 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1332 transitions. [2022-04-06 21:02:56,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:02:56,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1332 transitions. [2022-04-06 21:02:56,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:02:56,565 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:56,565 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:56,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 21:02:56,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 21:02:56,781 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:56,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash -431401302, now seen corresponding path program 181 times [2022-04-06 21:02:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:56,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [12889169] [2022-04-06 21:02:56,782 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:56,782 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:56,782 INFO L85 PathProgramCache]: Analyzing trace with hash -431401302, now seen corresponding path program 182 times [2022-04-06 21:02:56,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:56,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883770194] [2022-04-06 21:02:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:56,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:56,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:56,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:02:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:57,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:02:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:02:57,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:57,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883770194] [2022-04-06 21:02:57,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883770194] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:57,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248156203] [2022-04-06 21:02:57,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:57,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:57,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:57,324 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:57,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 21:02:57,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:57,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:02:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:02:57,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:02:57,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248156203] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:57,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:57,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 47 [2022-04-06 21:02:57,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:57,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [12889169] [2022-04-06 21:02:57,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [12889169] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:57,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:57,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:02:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042087582] [2022-04-06 21:02:57,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:57,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:02:57,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:02:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2061, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:02:57,791 INFO L87 Difference]: Start difference. First operand 1194 states and 1332 transitions. Second operand has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:00,837 INFO L93 Difference]: Finished difference Result 1336 states and 1491 transitions. [2022-04-06 21:03:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:03:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 21:03:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:00,848 INFO L225 Difference]: With dead ends: 1336 [2022-04-06 21:03:00,848 INFO L226 Difference]: Without dead ends: 1330 [2022-04-06 21:03:00,859 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=286, Invalid=7024, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 21:03:00,859 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 309 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8168 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 8226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 8168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:00,860 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 333 Invalid, 8226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 8168 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 21:03:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-04-06 21:03:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1210. [2022-04-06 21:03:01,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1087 states have (on average 1.1287948482060717) internal successors, (1227), 1163 states have internal predecessors, (1227), 43 states have call successors, (43), 5 states have call predecessors, (43), 79 states have return successors, (81), 41 states have call predecessors, (81), 41 states have call successors, (81) [2022-04-06 21:03:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1351 transitions. [2022-04-06 21:03:01,467 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1351 transitions. Word has length 59 [2022-04-06 21:03:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:01,467 INFO L478 AbstractCegarLoop]: Abstraction has 1210 states and 1351 transitions. [2022-04-06 21:03:01,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1351 transitions. [2022-04-06 21:03:01,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:03:01,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:01,477 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:01,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:01,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-06 21:03:01,694 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:01,694 INFO L85 PathProgramCache]: Analyzing trace with hash -279498742, now seen corresponding path program 183 times [2022-04-06 21:03:01,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:01,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [385061844] [2022-04-06 21:03:01,695 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:01,695 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:01,695 INFO L85 PathProgramCache]: Analyzing trace with hash -279498742, now seen corresponding path program 184 times [2022-04-06 21:03:01,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:01,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357468121] [2022-04-06 21:03:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:01,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:01,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:01,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:01,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:03:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:03:02,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:02,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357468121] [2022-04-06 21:03:02,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357468121] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:02,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677847378] [2022-04-06 21:03:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:02,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:02,317 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:02,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 21:03:02,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:02,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:03:02,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:03:02,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:03:03,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677847378] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:03,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:03,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 47 [2022-04-06 21:03:03,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:03,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [385061844] [2022-04-06 21:03:03,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [385061844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:03,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:03,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:03:03,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261286789] [2022-04-06 21:03:03,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:03,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:03:03,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:03,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:03:03,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2057, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:03:03,169 INFO L87 Difference]: Start difference. First operand 1210 states and 1351 transitions. Second operand has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:05,652 INFO L93 Difference]: Finished difference Result 1216 states and 1356 transitions. [2022-04-06 21:03:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:03:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 21:03:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:05,657 INFO L225 Difference]: With dead ends: 1216 [2022-04-06 21:03:05,658 INFO L226 Difference]: Without dead ends: 1194 [2022-04-06 21:03:05,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=288, Invalid=6684, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:03:05,667 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 236 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 6668 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 6711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 6668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:05,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 303 Invalid, 6711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 6668 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:03:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-04-06 21:03:06,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2022-04-06 21:03:06,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-04-06 21:03:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1333 transitions. [2022-04-06 21:03:06,260 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1333 transitions. Word has length 59 [2022-04-06 21:03:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:06,260 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1333 transitions. [2022-04-06 21:03:06,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1333 transitions. [2022-04-06 21:03:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:03:06,268 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:06,268 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:06,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-06 21:03:06,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:06,485 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2125532374, now seen corresponding path program 185 times [2022-04-06 21:03:06,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:06,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [364748461] [2022-04-06 21:03:06,486 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:06,486 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:06,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2125532374, now seen corresponding path program 186 times [2022-04-06 21:03:06,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:06,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567715473] [2022-04-06 21:03:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:06,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:06,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:06,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:06,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:03:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:03:07,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:07,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567715473] [2022-04-06 21:03:07,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567715473] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:07,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988686970] [2022-04-06 21:03:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:07,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:07,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:07,081 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:07,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 21:03:07,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:03:07,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:07,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:03:07,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:03:07,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:03:08,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988686970] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:08,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:08,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 47 [2022-04-06 21:03:08,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:08,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [364748461] [2022-04-06 21:03:08,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [364748461] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:08,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:08,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:03:08,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119345579] [2022-04-06 21:03:08,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:08,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:03:08,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:08,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:03:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2053, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:03:08,024 INFO L87 Difference]: Start difference. First operand 1194 states and 1333 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:10,781 INFO L93 Difference]: Finished difference Result 1200 states and 1338 transitions. [2022-04-06 21:03:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:03:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 21:03:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:10,787 INFO L225 Difference]: With dead ends: 1200 [2022-04-06 21:03:10,787 INFO L226 Difference]: Without dead ends: 1176 [2022-04-06 21:03:10,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=290, Invalid=6352, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 21:03:10,800 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5288 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 5330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:10,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 273 Invalid, 5330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5288 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 21:03:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-04-06 21:03:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-04-06 21:03:11,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1059 states have (on average 1.1284230406043436) internal successors, (1195), 1131 states have internal predecessors, (1195), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2022-04-06 21:03:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1313 transitions. [2022-04-06 21:03:11,391 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1313 transitions. Word has length 59 [2022-04-06 21:03:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:11,392 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1313 transitions. [2022-04-06 21:03:11,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1313 transitions. [2022-04-06 21:03:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:03:11,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:11,400 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:11,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-06 21:03:11,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 21:03:11,615 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash 565515146, now seen corresponding path program 187 times [2022-04-06 21:03:11,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:11,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1041383433] [2022-04-06 21:03:11,616 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:11,616 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash 565515146, now seen corresponding path program 188 times [2022-04-06 21:03:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:11,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987535696] [2022-04-06 21:03:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:11,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:11,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:11,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:11,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:03:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:03:12,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987535696] [2022-04-06 21:03:12,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987535696] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209541594] [2022-04-06 21:03:12,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:12,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:12,134 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:12,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 21:03:12,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:12,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:12,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:03:12,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:03:12,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:03:13,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209541594] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:13,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:13,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 47 [2022-04-06 21:03:13,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:13,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1041383433] [2022-04-06 21:03:13,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1041383433] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:13,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:13,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:03:13,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659146031] [2022-04-06 21:03:13,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:13,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:03:13,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:03:13,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:03:13,081 INFO L87 Difference]: Start difference. First operand 1176 states and 1313 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:15,119 INFO L93 Difference]: Finished difference Result 1182 states and 1318 transitions. [2022-04-06 21:03:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:03:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 21:03:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:15,124 INFO L225 Difference]: With dead ends: 1182 [2022-04-06 21:03:15,124 INFO L226 Difference]: Without dead ends: 1156 [2022-04-06 21:03:15,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=292, Invalid=6028, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 21:03:15,134 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4028 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:15,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 243 Invalid, 4068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4028 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:03:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-04-06 21:03:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1156. [2022-04-06 21:03:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1042 states have (on average 1.128598848368522) internal successors, (1176), 1112 states have internal predecessors, (1176), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (75), 38 states have call predecessors, (75), 38 states have call successors, (75) [2022-04-06 21:03:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1291 transitions. [2022-04-06 21:03:15,701 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1291 transitions. Word has length 59 [2022-04-06 21:03:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:15,701 INFO L478 AbstractCegarLoop]: Abstraction has 1156 states and 1291 transitions. [2022-04-06 21:03:15,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1291 transitions. [2022-04-06 21:03:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:03:15,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:15,709 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:15,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:15,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 21:03:15,923 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash -532705366, now seen corresponding path program 189 times [2022-04-06 21:03:15,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:15,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818201860] [2022-04-06 21:03:15,924 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:15,925 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:15,925 INFO L85 PathProgramCache]: Analyzing trace with hash -532705366, now seen corresponding path program 190 times [2022-04-06 21:03:15,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:15,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080039021] [2022-04-06 21:03:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:15,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:15,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:15,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:16,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:03:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:03:16,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:16,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080039021] [2022-04-06 21:03:16,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080039021] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:16,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911385782] [2022-04-06 21:03:16,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:16,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:16,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:16,337 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:16,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 21:03:16,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:16,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:03:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:03:17,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:03:17,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911385782] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:17,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:17,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-04-06 21:03:17,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:17,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818201860] [2022-04-06 21:03:17,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818201860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:17,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:17,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:03:17,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170] [2022-04-06 21:03:17,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:17,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:03:17,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:03:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2045, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:03:17,260 INFO L87 Difference]: Start difference. First operand 1156 states and 1291 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:19,029 INFO L93 Difference]: Finished difference Result 1162 states and 1296 transitions. [2022-04-06 21:03:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:03:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 21:03:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:19,034 INFO L225 Difference]: With dead ends: 1162 [2022-04-06 21:03:19,034 INFO L226 Difference]: Without dead ends: 1134 [2022-04-06 21:03:19,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=294, Invalid=5712, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 21:03:19,046 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 120 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2803 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:19,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 210 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2803 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:03:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-04-06 21:03:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1134. [2022-04-06 21:03:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1023 states have (on average 1.1290322580645162) internal successors, (1155), 1091 states have internal predecessors, (1155), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (73), 37 states have call predecessors, (73), 37 states have call successors, (73) [2022-04-06 21:03:19,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1267 transitions. [2022-04-06 21:03:19,608 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1267 transitions. Word has length 59 [2022-04-06 21:03:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:19,608 INFO L478 AbstractCegarLoop]: Abstraction has 1134 states and 1267 transitions. [2022-04-06 21:03:19,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:19,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1267 transitions. [2022-04-06 21:03:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:03:19,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:19,615 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:19,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 21:03:19,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-04-06 21:03:19,832 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:19,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1671481989, now seen corresponding path program 191 times [2022-04-06 21:03:19,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1537092982] [2022-04-06 21:03:19,833 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,833 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:19,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1671481989, now seen corresponding path program 192 times [2022-04-06 21:03:19,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:19,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201612122] [2022-04-06 21:03:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:19,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 21:03:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 21:03:20,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201612122] [2022-04-06 21:03:20,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201612122] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923619262] [2022-04-06 21:03:20,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:20,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:20,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:20,052 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:20,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 21:03:20,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:03:20,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:20,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:03:20,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 21:03:20,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 21:03:20,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923619262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:20,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:20,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-04-06 21:03:20,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:20,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1537092982] [2022-04-06 21:03:20,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1537092982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:20,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:20,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:03:20,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221665589] [2022-04-06 21:03:20,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:20,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:03:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:03:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:03:20,890 INFO L87 Difference]: Start difference. First operand 1134 states and 1267 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:22,382 INFO L93 Difference]: Finished difference Result 1238 states and 1393 transitions. [2022-04-06 21:03:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:03:22,382 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 21:03:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:22,430 INFO L225 Difference]: With dead ends: 1238 [2022-04-06 21:03:22,430 INFO L226 Difference]: Without dead ends: 1219 [2022-04-06 21:03:22,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=4379, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 21:03:22,443 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 213 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:22,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 189 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:03:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-04-06 21:03:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1214. [2022-04-06 21:03:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1070 states have (on average 1.122429906542056) internal successors, (1201), 1160 states have internal predecessors, (1201), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-04-06 21:03:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1357 transitions. [2022-04-06 21:03:23,128 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1357 transitions. Word has length 59 [2022-04-06 21:03:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:23,129 INFO L478 AbstractCegarLoop]: Abstraction has 1214 states and 1357 transitions. [2022-04-06 21:03:23,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1357 transitions. [2022-04-06 21:03:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:03:23,137 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:23,137 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:23,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 21:03:23,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-04-06 21:03:23,354 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1489237770, now seen corresponding path program 193 times [2022-04-06 21:03:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1864453736] [2022-04-06 21:03:23,355 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:23,355 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1489237770, now seen corresponding path program 194 times [2022-04-06 21:03:23,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:23,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522783875] [2022-04-06 21:03:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:23,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:23,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:23,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:23,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:03:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:03:23,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:23,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522783875] [2022-04-06 21:03:23,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522783875] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:23,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860563143] [2022-04-06 21:03:23,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:23,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:23,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:23,830 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:23,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 21:03:23,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:03:23,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:03:24,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:03:24,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860563143] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:24,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:24,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 47 [2022-04-06 21:03:24,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:24,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1864453736] [2022-04-06 21:03:24,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1864453736] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:24,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:24,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:03:24,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757261294] [2022-04-06 21:03:24,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:24,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:03:24,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:24,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:03:24,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2041, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:03:24,871 INFO L87 Difference]: Start difference. First operand 1214 states and 1357 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:26,486 INFO L93 Difference]: Finished difference Result 1232 states and 1379 transitions. [2022-04-06 21:03:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:03:26,487 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 21:03:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:26,511 INFO L225 Difference]: With dead ends: 1232 [2022-04-06 21:03:26,511 INFO L226 Difference]: Without dead ends: 1213 [2022-04-06 21:03:26,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=5404, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 21:03:26,524 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:26,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 183 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:03:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-04-06 21:03:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1208. [2022-04-06 21:03:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1064 states have (on average 1.1240601503759398) internal successors, (1196), 1154 states have internal predecessors, (1196), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-04-06 21:03:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1352 transitions. [2022-04-06 21:03:27,170 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1352 transitions. Word has length 59 [2022-04-06 21:03:27,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:27,170 INFO L478 AbstractCegarLoop]: Abstraction has 1208 states and 1352 transitions. [2022-04-06 21:03:27,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1352 transitions. [2022-04-06 21:03:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:03:27,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:27,180 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:27,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:27,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:27,397 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:27,397 INFO L85 PathProgramCache]: Analyzing trace with hash 930505855, now seen corresponding path program 195 times [2022-04-06 21:03:27,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:27,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408245317] [2022-04-06 21:03:27,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:27,399 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:27,399 INFO L85 PathProgramCache]: Analyzing trace with hash 930505855, now seen corresponding path program 196 times [2022-04-06 21:03:27,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:27,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637473204] [2022-04-06 21:03:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:27,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:27,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:27,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:27,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:03:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 21:03:27,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637473204] [2022-04-06 21:03:27,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637473204] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658741230] [2022-04-06 21:03:27,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:27,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:27,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:27,648 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:27,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 21:03:27,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:27,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:03:27,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 21:03:28,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 21:03:28,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658741230] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:28,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:28,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-04-06 21:03:28,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408245317] [2022-04-06 21:03:28,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408245317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:28,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:28,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:03:28,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645241670] [2022-04-06 21:03:28,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:28,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:03:28,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:28,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:03:28,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:03:28,853 INFO L87 Difference]: Start difference. First operand 1208 states and 1352 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:30,727 INFO L93 Difference]: Finished difference Result 1222 states and 1365 transitions. [2022-04-06 21:03:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:03:30,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 21:03:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:30,733 INFO L225 Difference]: With dead ends: 1222 [2022-04-06 21:03:30,733 INFO L226 Difference]: Without dead ends: 1194 [2022-04-06 21:03:30,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=4379, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 21:03:30,744 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 212 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:30,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 188 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 21:03:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-04-06 21:03:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1192. [2022-04-06 21:03:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1048 states have (on average 1.1240458015267176) internal successors, (1178), 1138 states have internal predecessors, (1178), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (96), 48 states have call predecessors, (96), 48 states have call successors, (96) [2022-04-06 21:03:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1324 transitions. [2022-04-06 21:03:31,370 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1324 transitions. Word has length 59 [2022-04-06 21:03:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:31,370 INFO L478 AbstractCegarLoop]: Abstraction has 1192 states and 1324 transitions. [2022-04-06 21:03:31,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1324 transitions. [2022-04-06 21:03:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 21:03:31,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:31,379 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:31,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:31,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 21:03:31,595 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1508010897, now seen corresponding path program 197 times [2022-04-06 21:03:31,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:31,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2085980347] [2022-04-06 21:03:31,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:31,597 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1508010897, now seen corresponding path program 198 times [2022-04-06 21:03:31,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:31,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569742803] [2022-04-06 21:03:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:31,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:31,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:31,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:03:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:03:32,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:32,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569742803] [2022-04-06 21:03:32,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569742803] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:32,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474162117] [2022-04-06 21:03:32,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:32,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:32,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:32,150 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:32,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 21:03:32,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 21:03:32,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:32,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 21:03:32,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:03:33,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:03:34,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474162117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:34,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:34,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-04-06 21:03:34,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:34,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2085980347] [2022-04-06 21:03:34,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2085980347] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:34,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:34,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:03:34,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623117037] [2022-04-06 21:03:34,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:34,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:03:34,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:03:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 21:03:34,467 INFO L87 Difference]: Start difference. First operand 1192 states and 1324 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:37,542 INFO L93 Difference]: Finished difference Result 1336 states and 1493 transitions. [2022-04-06 21:03:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:03:37,563 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-04-06 21:03:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:37,586 INFO L225 Difference]: With dead ends: 1336 [2022-04-06 21:03:37,587 INFO L226 Difference]: Without dead ends: 1322 [2022-04-06 21:03:37,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=483, Invalid=12399, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 21:03:37,600 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 294 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6512 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 6546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 6512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:37,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 298 Invalid, 6546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 6512 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 21:03:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-04-06 21:03:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1313. [2022-04-06 21:03:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1154 states have (on average 1.123050259965338) internal successors, (1296), 1254 states have internal predecessors, (1296), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (111), 53 states have call predecessors, (111), 53 states have call successors, (111) [2022-04-06 21:03:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1462 transitions. [2022-04-06 21:03:38,297 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1462 transitions. Word has length 60 [2022-04-06 21:03:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:38,297 INFO L478 AbstractCegarLoop]: Abstraction has 1313 states and 1462 transitions. [2022-04-06 21:03:38,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1462 transitions. [2022-04-06 21:03:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 21:03:38,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:38,307 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:38,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:38,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:38,523 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:38,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash 368244332, now seen corresponding path program 199 times [2022-04-06 21:03:38,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:38,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1867380707] [2022-04-06 21:03:38,524 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:38,524 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash 368244332, now seen corresponding path program 200 times [2022-04-06 21:03:38,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:38,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099449883] [2022-04-06 21:03:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:38,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:38,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:38,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:38,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:03:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:03:38,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:38,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099449883] [2022-04-06 21:03:38,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099449883] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:38,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314806282] [2022-04-06 21:03:38,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:38,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:38,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:38,881 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:38,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 21:03:38,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 21:03:38,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:03:39,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:03:41,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314806282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:41,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:41,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-04-06 21:03:41,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:41,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1867380707] [2022-04-06 21:03:41,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1867380707] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:41,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:41,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:03:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217165397] [2022-04-06 21:03:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:41,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:03:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:03:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 21:03:41,332 INFO L87 Difference]: Start difference. First operand 1313 states and 1462 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:44,280 INFO L93 Difference]: Finished difference Result 1328 states and 1477 transitions. [2022-04-06 21:03:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:03:44,281 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-04-06 21:03:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:44,287 INFO L225 Difference]: With dead ends: 1328 [2022-04-06 21:03:44,287 INFO L226 Difference]: Without dead ends: 1316 [2022-04-06 21:03:44,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=483, Invalid=12399, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 21:03:44,301 INFO L913 BasicCegarLoop]: 148 mSDtfsCounter, 312 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 6356 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 6389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 6356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:44,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 295 Invalid, 6389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 6356 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 21:03:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-04-06 21:03:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1314. [2022-04-06 21:03:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1155 states have (on average 1.122943722943723) internal successors, (1297), 1255 states have internal predecessors, (1297), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-04-06 21:03:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1457 transitions. [2022-04-06 21:03:45,003 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1457 transitions. Word has length 60 [2022-04-06 21:03:45,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:45,003 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1457 transitions. [2022-04-06 21:03:45,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1457 transitions. [2022-04-06 21:03:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 21:03:45,015 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:45,015 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:45,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:45,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:45,231 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1252044946, now seen corresponding path program 201 times [2022-04-06 21:03:45,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:45,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [732042672] [2022-04-06 21:03:45,232 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:45,232 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1252044946, now seen corresponding path program 202 times [2022-04-06 21:03:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:45,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021248883] [2022-04-06 21:03:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:45,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 21:03:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:03:45,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021248883] [2022-04-06 21:03:45,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021248883] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541797841] [2022-04-06 21:03:45,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:45,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:45,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:45,343 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:45,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 21:03:45,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:45,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:45,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 21:03:45,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:03:45,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:03:45,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541797841] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:45,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:45,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-04-06 21:03:45,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:45,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [732042672] [2022-04-06 21:03:45,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [732042672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:45,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:45,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:03:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259188072] [2022-04-06 21:03:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:45,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:03:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:03:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:03:45,651 INFO L87 Difference]: Start difference. First operand 1314 states and 1457 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:46,886 INFO L93 Difference]: Finished difference Result 1985 states and 2169 transitions. [2022-04-06 21:03:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 21:03:46,886 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-04-06 21:03:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:46,916 INFO L225 Difference]: With dead ends: 1985 [2022-04-06 21:03:46,916 INFO L226 Difference]: Without dead ends: 1315 [2022-04-06 21:03:46,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1101, Invalid=2559, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 21:03:46,933 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 118 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:46,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 83 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:03:46,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-04-06 21:03:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1307. [2022-04-06 21:03:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1154 states have (on average 1.1195840554592722) internal successors, (1292), 1250 states have internal predecessors, (1292), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-04-06 21:03:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1444 transitions. [2022-04-06 21:03:47,639 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1444 transitions. Word has length 60 [2022-04-06 21:03:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:47,640 INFO L478 AbstractCegarLoop]: Abstraction has 1307 states and 1444 transitions. [2022-04-06 21:03:47,640 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1444 transitions. [2022-04-06 21:03:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 21:03:47,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:47,650 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:47,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 21:03:47,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:47,866 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:47,866 INFO L85 PathProgramCache]: Analyzing trace with hash 476370573, now seen corresponding path program 203 times [2022-04-06 21:03:47,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:47,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [852145878] [2022-04-06 21:03:47,867 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:47,867 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash 476370573, now seen corresponding path program 204 times [2022-04-06 21:03:47,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:47,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259880294] [2022-04-06 21:03:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:47,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:47,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:47,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:47,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:03:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:03:47,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:47,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259880294] [2022-04-06 21:03:47,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259880294] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:47,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032062383] [2022-04-06 21:03:47,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:47,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:47,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:47,980 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:47,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 21:03:48,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:03:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:48,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 21:03:48,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:03:48,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:03:48,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032062383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:48,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:48,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-04-06 21:03:48,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [852145878] [2022-04-06 21:03:48,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [852145878] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:48,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:48,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:03:48,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100669287] [2022-04-06 21:03:48,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:48,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:03:48,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:03:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:03:48,289 INFO L87 Difference]: Start difference. First operand 1307 states and 1444 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:03:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:49,548 INFO L93 Difference]: Finished difference Result 1365 states and 1514 transitions. [2022-04-06 21:03:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 21:03:49,549 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-04-06 21:03:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:49,554 INFO L225 Difference]: With dead ends: 1365 [2022-04-06 21:03:49,554 INFO L226 Difference]: Without dead ends: 1320 [2022-04-06 21:03:49,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1101, Invalid=2559, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 21:03:49,568 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 141 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:49,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 76 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-04-06 21:03:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-04-06 21:03:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-04-06 21:03:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1457 transitions. [2022-04-06 21:03:50,288 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1457 transitions. Word has length 60 [2022-04-06 21:03:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:50,288 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1457 transitions. [2022-04-06 21:03:50,288 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:03:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1457 transitions. [2022-04-06 21:03:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 21:03:50,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:50,298 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:50,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 21:03:50,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-06 21:03:50,512 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1806167277, now seen corresponding path program 205 times [2022-04-06 21:03:50,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:50,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843514402] [2022-04-06 21:03:50,513 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,514 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:50,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1806167277, now seen corresponding path program 206 times [2022-04-06 21:03:50,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:50,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7230457] [2022-04-06 21:03:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:50,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:03:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:03:51,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:51,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7230457] [2022-04-06 21:03:51,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7230457] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:51,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975953473] [2022-04-06 21:03:51,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:51,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:51,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:51,217 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:51,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 21:03:51,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:51,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:03:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:03:51,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:03:51,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975953473] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:51,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:51,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 49 [2022-04-06 21:03:51,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843514402] [2022-04-06 21:03:51,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843514402] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:51,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:51,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:03:51,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153911388] [2022-04-06 21:03:51,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:51,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:03:51,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:03:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:03:51,966 INFO L87 Difference]: Start difference. First operand 1320 states and 1457 transitions. Second operand has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:55,310 INFO L93 Difference]: Finished difference Result 1470 states and 1624 transitions. [2022-04-06 21:03:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:03:55,311 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-04-06 21:03:55,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:55,323 INFO L225 Difference]: With dead ends: 1470 [2022-04-06 21:03:55,323 INFO L226 Difference]: Without dead ends: 1464 [2022-04-06 21:03:55,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=298, Invalid=7712, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:03:55,337 INFO L913 BasicCegarLoop]: 149 mSDtfsCounter, 330 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 9156 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 9218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 9156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:55,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 351 Invalid, 9218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 9156 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 21:03:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-04-06 21:03:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1336. [2022-04-06 21:03:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1180 states have (on average 1.11864406779661) internal successors, (1320), 1278 states have internal predecessors, (1320), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (102), 52 states have call predecessors, (102), 52 states have call successors, (102) [2022-04-06 21:03:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1476 transitions. [2022-04-06 21:03:56,068 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1476 transitions. Word has length 61 [2022-04-06 21:03:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:56,068 INFO L478 AbstractCegarLoop]: Abstraction has 1336 states and 1476 transitions. [2022-04-06 21:03:56,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:03:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1476 transitions. [2022-04-06 21:03:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 21:03:56,079 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:56,079 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:56,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:56,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:56,281 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1360021805, now seen corresponding path program 207 times [2022-04-06 21:03:56,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:56,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1245635726] [2022-04-06 21:03:56,285 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:56,285 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:56,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1360021805, now seen corresponding path program 208 times [2022-04-06 21:03:56,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:56,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451441727] [2022-04-06 21:03:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:56,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:56,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:56,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:03:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:56,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:03:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:03:56,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:56,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451441727] [2022-04-06 21:03:56,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451441727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:56,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041412853] [2022-04-06 21:03:56,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:56,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:56,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:56,940 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:56,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 21:03:57,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:57,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:57,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:03:57,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:03:57,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:03:57,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041412853] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:57,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:57,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 49 [2022-04-06 21:03:57,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:57,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1245635726] [2022-04-06 21:03:57,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1245635726] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:57,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:57,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:03:57,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313586943] [2022-04-06 21:03:57,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:57,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:03:57,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:57,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:03:57,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2243, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:03:57,831 INFO L87 Difference]: Start difference. First operand 1336 states and 1476 transitions. Second operand has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:01,002 INFO L93 Difference]: Finished difference Result 1342 states and 1481 transitions. [2022-04-06 21:04:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:04:01,002 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-04-06 21:04:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:01,009 INFO L225 Difference]: With dead ends: 1342 [2022-04-06 21:04:01,010 INFO L226 Difference]: Without dead ends: 1320 [2022-04-06 21:04:01,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=300, Invalid=7356, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 21:04:01,032 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 251 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 7792 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 7835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 7792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:01,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 326 Invalid, 7835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 7792 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 21:04:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-04-06 21:04:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-04-06 21:04:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (100), 51 states have call predecessors, (100), 51 states have call successors, (100) [2022-04-06 21:04:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1458 transitions. [2022-04-06 21:04:01,780 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1458 transitions. Word has length 61 [2022-04-06 21:04:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:01,780 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1458 transitions. [2022-04-06 21:04:01,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1458 transitions. [2022-04-06 21:04:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 21:04:01,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:01,792 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:01,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:02,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:02,012 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -165892883, now seen corresponding path program 209 times [2022-04-06 21:04:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:02,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95335687] [2022-04-06 21:04:02,012 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:02,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash -165892883, now seen corresponding path program 210 times [2022-04-06 21:04:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:02,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034382578] [2022-04-06 21:04:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:02,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:02,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:02,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:04:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:04:02,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034382578] [2022-04-06 21:04:02,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034382578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906516676] [2022-04-06 21:04:02,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:02,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:02,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:02,644 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:02,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 21:04:02,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 21:04:02,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:02,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:04:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:04:03,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:04:03,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906516676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:03,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:03,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 49 [2022-04-06 21:04:03,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:03,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95335687] [2022-04-06 21:04:03,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95335687] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:03,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:03,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:04:03,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737019583] [2022-04-06 21:04:03,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:03,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:04:03,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:04:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2239, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:04:03,596 INFO L87 Difference]: Start difference. First operand 1320 states and 1458 transitions. Second operand has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:06,400 INFO L93 Difference]: Finished difference Result 1326 states and 1463 transitions. [2022-04-06 21:04:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:04:06,400 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-04-06 21:04:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:06,406 INFO L225 Difference]: With dead ends: 1326 [2022-04-06 21:04:06,406 INFO L226 Difference]: Without dead ends: 1302 [2022-04-06 21:04:06,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=7008, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 21:04:06,437 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 6312 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 6354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:06,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 296 Invalid, 6354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6312 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 21:04:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-04-06 21:04:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2022-04-06 21:04:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1152 states have (on average 1.1180555555555556) internal successors, (1288), 1246 states have internal predecessors, (1288), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (98), 50 states have call predecessors, (98), 50 states have call successors, (98) [2022-04-06 21:04:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1438 transitions. [2022-04-06 21:04:07,150 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1438 transitions. Word has length 61 [2022-04-06 21:04:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:07,150 INFO L478 AbstractCegarLoop]: Abstraction has 1302 states and 1438 transitions. [2022-04-06 21:04:07,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1438 transitions. [2022-04-06 21:04:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 21:04:07,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:07,159 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:07,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-06 21:04:07,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 21:04:07,366 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:07,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1490253523, now seen corresponding path program 211 times [2022-04-06 21:04:07,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:07,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [461801241] [2022-04-06 21:04:07,367 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:07,367 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:07,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1490253523, now seen corresponding path program 212 times [2022-04-06 21:04:07,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:07,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604597436] [2022-04-06 21:04:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:07,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:07,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:07,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:07,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:04:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:04:07,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:07,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604597436] [2022-04-06 21:04:07,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604597436] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:07,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912018105] [2022-04-06 21:04:07,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:07,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:07,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:07,841 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:07,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 21:04:07,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:07,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:04:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:04:08,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:04:08,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912018105] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:08,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:08,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 49 [2022-04-06 21:04:08,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:08,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [461801241] [2022-04-06 21:04:08,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [461801241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:08,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:08,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:04:08,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800744829] [2022-04-06 21:04:08,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:08,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:04:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:04:08,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:04:08,537 INFO L87 Difference]: Start difference. First operand 1302 states and 1438 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:11,181 INFO L93 Difference]: Finished difference Result 1308 states and 1443 transitions. [2022-04-06 21:04:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:04:11,181 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-04-06 21:04:11,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:11,187 INFO L225 Difference]: With dead ends: 1308 [2022-04-06 21:04:11,187 INFO L226 Difference]: Without dead ends: 1282 [2022-04-06 21:04:11,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=304, Invalid=6668, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:04:11,206 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 173 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4952 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:11,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 266 Invalid, 4992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4952 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:04:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-04-06 21:04:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1282. [2022-04-06 21:04:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1135 states have (on average 1.1180616740088105) internal successors, (1269), 1227 states have internal predecessors, (1269), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (96), 49 states have call predecessors, (96), 49 states have call successors, (96) [2022-04-06 21:04:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1416 transitions. [2022-04-06 21:04:11,908 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1416 transitions. Word has length 61 [2022-04-06 21:04:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:11,908 INFO L478 AbstractCegarLoop]: Abstraction has 1282 states and 1416 transitions. [2022-04-06 21:04:11,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1416 transitions. [2022-04-06 21:04:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 21:04:11,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:11,917 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:11,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:12,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-06 21:04:12,134 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:12,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash 779054317, now seen corresponding path program 213 times [2022-04-06 21:04:12,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:12,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1764082321] [2022-04-06 21:04:12,135 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:12,135 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash 779054317, now seen corresponding path program 214 times [2022-04-06 21:04:12,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:12,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108622791] [2022-04-06 21:04:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:12,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:12,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:12,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:12,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:04:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:04:12,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:12,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108622791] [2022-04-06 21:04:12,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108622791] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:12,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153762225] [2022-04-06 21:04:12,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:12,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:12,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:12,664 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:12,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 21:04:12,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:12,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:04:12,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:04:13,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:04:13,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153762225] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:13,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:13,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 49 [2022-04-06 21:04:13,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:13,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1764082321] [2022-04-06 21:04:13,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1764082321] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:13,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:13,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:04:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297430540] [2022-04-06 21:04:13,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:13,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:04:13,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:13,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:04:13,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2231, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:04:13,787 INFO L87 Difference]: Start difference. First operand 1282 states and 1416 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:15,831 INFO L93 Difference]: Finished difference Result 1288 states and 1421 transitions. [2022-04-06 21:04:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:04:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-04-06 21:04:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:15,836 INFO L225 Difference]: With dead ends: 1288 [2022-04-06 21:04:15,837 INFO L226 Difference]: Without dead ends: 1260 [2022-04-06 21:04:15,848 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=306, Invalid=6336, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 21:04:15,848 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3712 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:15,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 236 Invalid, 3750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3712 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:04:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-04-06 21:04:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1260. [2022-04-06 21:04:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1116 states have (on average 1.118279569892473) internal successors, (1248), 1206 states have internal predecessors, (1248), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (94), 48 states have call predecessors, (94), 48 states have call successors, (94) [2022-04-06 21:04:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1392 transitions. [2022-04-06 21:04:16,535 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1392 transitions. Word has length 61 [2022-04-06 21:04:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:16,535 INFO L478 AbstractCegarLoop]: Abstraction has 1260 states and 1392 transitions. [2022-04-06 21:04:16,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1392 transitions. [2022-04-06 21:04:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 21:04:16,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:16,544 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:16,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:16,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:16,751 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash 896190765, now seen corresponding path program 215 times [2022-04-06 21:04:16,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:16,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [343216964] [2022-04-06 21:04:16,752 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:16,752 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash 896190765, now seen corresponding path program 216 times [2022-04-06 21:04:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197688983] [2022-04-06 21:04:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:16,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:16,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:16,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:16,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:04:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:04:17,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197688983] [2022-04-06 21:04:17,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197688983] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638475089] [2022-04-06 21:04:17,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:17,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:17,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:17,166 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:17,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 21:04:17,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:04:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:17,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:04:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:04:17,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:04:18,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638475089] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:18,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:18,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 49 [2022-04-06 21:04:18,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:18,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [343216964] [2022-04-06 21:04:18,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [343216964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:18,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:18,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:04:18,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355152350] [2022-04-06 21:04:18,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:18,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:04:18,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:04:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:04:18,267 INFO L87 Difference]: Start difference. First operand 1260 states and 1392 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:20,190 INFO L93 Difference]: Finished difference Result 1266 states and 1397 transitions. [2022-04-06 21:04:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:04:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-04-06 21:04:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:20,195 INFO L225 Difference]: With dead ends: 1266 [2022-04-06 21:04:20,195 INFO L226 Difference]: Without dead ends: 1236 [2022-04-06 21:04:20,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=308, Invalid=6012, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 21:04:20,206 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:20,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 206 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:04:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-04-06 21:04:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1236. [2022-04-06 21:04:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1095 states have (on average 1.1187214611872147) internal successors, (1225), 1183 states have internal predecessors, (1225), 49 states have call successors, (49), 5 states have call predecessors, (49), 91 states have return successors, (92), 47 states have call predecessors, (92), 47 states have call successors, (92) [2022-04-06 21:04:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1366 transitions. [2022-04-06 21:04:20,886 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1366 transitions. Word has length 61 [2022-04-06 21:04:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:20,886 INFO L478 AbstractCegarLoop]: Abstraction has 1236 states and 1366 transitions. [2022-04-06 21:04:20,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1366 transitions. [2022-04-06 21:04:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 21:04:20,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:20,895 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:20,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-04-06 21:04:21,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:21,112 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1063244563, now seen corresponding path program 217 times [2022-04-06 21:04:21,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:21,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567160047] [2022-04-06 21:04:21,113 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:21,113 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:21,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1063244563, now seen corresponding path program 218 times [2022-04-06 21:04:21,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:21,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406876870] [2022-04-06 21:04:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:21,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:21,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:21,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:04:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:04:21,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:21,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406876870] [2022-04-06 21:04:21,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406876870] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:21,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679487304] [2022-04-06 21:04:21,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:21,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:21,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:21,441 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:21,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 21:04:21,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:21,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:21,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:04:21,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:04:22,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:04:22,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679487304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:22,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:22,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 49 [2022-04-06 21:04:22,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:22,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567160047] [2022-04-06 21:04:22,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567160047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:22,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:22,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:04:22,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708380438] [2022-04-06 21:04:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:22,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:04:22,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:04:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:04:22,477 INFO L87 Difference]: Start difference. First operand 1236 states and 1366 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:24,088 INFO L93 Difference]: Finished difference Result 1254 states and 1387 transitions. [2022-04-06 21:04:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:04:24,088 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-04-06 21:04:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:24,100 INFO L225 Difference]: With dead ends: 1254 [2022-04-06 21:04:24,101 INFO L226 Difference]: Without dead ends: 1248 [2022-04-06 21:04:24,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=310, Invalid=5696, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 21:04:24,112 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:24,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 173 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:04:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-04-06 21:04:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1246. [2022-04-06 21:04:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1102 states have (on average 1.1197822141560798) internal successors, (1234), 1192 states have internal predecessors, (1234), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (95), 48 states have call predecessors, (95), 48 states have call successors, (95) [2022-04-06 21:04:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1379 transitions. [2022-04-06 21:04:24,794 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1379 transitions. Word has length 61 [2022-04-06 21:04:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:24,794 INFO L478 AbstractCegarLoop]: Abstraction has 1246 states and 1379 transitions. [2022-04-06 21:04:24,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1379 transitions. [2022-04-06 21:04:24,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 21:04:24,803 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:24,803 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:24,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:25,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-04-06 21:04:25,019 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash -862861684, now seen corresponding path program 219 times [2022-04-06 21:04:25,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:25,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142643482] [2022-04-06 21:04:25,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:25,020 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash -862861684, now seen corresponding path program 220 times [2022-04-06 21:04:25,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:25,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594482392] [2022-04-06 21:04:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:25,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:25,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:25,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:04:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:04:25,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:25,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594482392] [2022-04-06 21:04:25,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594482392] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:25,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291645225] [2022-04-06 21:04:25,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:25,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:25,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:25,634 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:25,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 21:04:25,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:25,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:25,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 21:04:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:04:26,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:04:28,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291645225] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:28,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:28,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-04-06 21:04:28,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:28,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142643482] [2022-04-06 21:04:28,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142643482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:28,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:28,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:04:28,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339640995] [2022-04-06 21:04:28,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:28,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:04:28,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:28,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:04:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 21:04:28,098 INFO L87 Difference]: Start difference. First operand 1246 states and 1379 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:31,810 INFO L93 Difference]: Finished difference Result 1392 states and 1550 transitions. [2022-04-06 21:04:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:04:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-04-06 21:04:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:31,854 INFO L225 Difference]: With dead ends: 1392 [2022-04-06 21:04:31,854 INFO L226 Difference]: Without dead ends: 1378 [2022-04-06 21:04:31,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=518, Invalid=14244, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 21:04:31,871 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 316 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 7229 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 7265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 7229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:31,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 313 Invalid, 7265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 7229 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 21:04:31,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-04-06 21:04:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1369. [2022-04-06 21:04:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1210 states have (on average 1.1190082644628099) internal successors, (1354), 1310 states have internal predecessors, (1354), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (110), 53 states have call predecessors, (110), 53 states have call successors, (110) [2022-04-06 21:04:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1519 transitions. [2022-04-06 21:04:32,682 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1519 transitions. Word has length 62 [2022-04-06 21:04:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:32,683 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 1519 transitions. [2022-04-06 21:04:32,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1519 transitions. [2022-04-06 21:04:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 21:04:32,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:32,695 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:32,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-04-06 21:04:32,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:32,911 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1466475567, now seen corresponding path program 221 times [2022-04-06 21:04:32,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:32,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362058793] [2022-04-06 21:04:32,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:32,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1466475567, now seen corresponding path program 222 times [2022-04-06 21:04:32,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:32,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705211912] [2022-04-06 21:04:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:32,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:32,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:32,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:33,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:04:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:04:33,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705211912] [2022-04-06 21:04:33,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705211912] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934581893] [2022-04-06 21:04:33,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:33,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:33,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:33,569 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:33,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 21:04:33,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 21:04:33,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:33,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 21:04:33,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:04:34,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:04:36,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934581893] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:36,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:36,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-04-06 21:04:36,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:36,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362058793] [2022-04-06 21:04:36,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362058793] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:36,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:36,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:04:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945611874] [2022-04-06 21:04:36,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:36,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:04:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:36,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:04:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 21:04:36,540 INFO L87 Difference]: Start difference. First operand 1369 states and 1519 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:40,502 INFO L93 Difference]: Finished difference Result 1384 states and 1534 transitions. [2022-04-06 21:04:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:04:40,503 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-04-06 21:04:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:40,523 INFO L225 Difference]: With dead ends: 1384 [2022-04-06 21:04:40,523 INFO L226 Difference]: Without dead ends: 1372 [2022-04-06 21:04:40,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=518, Invalid=14244, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 21:04:40,541 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 333 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 7290 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 7325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 7290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:40,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 315 Invalid, 7325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 7290 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 21:04:40,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-04-06 21:04:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1370. [2022-04-06 21:04:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1211 states have (on average 1.1189099917423617) internal successors, (1355), 1311 states have internal predecessors, (1355), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-04-06 21:04:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1514 transitions. [2022-04-06 21:04:41,340 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1514 transitions. Word has length 62 [2022-04-06 21:04:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:41,340 INFO L478 AbstractCegarLoop]: Abstraction has 1370 states and 1514 transitions. [2022-04-06 21:04:41,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1514 transitions. [2022-04-06 21:04:41,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 21:04:41,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:41,352 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:41,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:41,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:41,568 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1546673523, now seen corresponding path program 223 times [2022-04-06 21:04:41,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:41,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [926822086] [2022-04-06 21:04:41,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:41,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:41,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1546673523, now seen corresponding path program 224 times [2022-04-06 21:04:41,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:41,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535131689] [2022-04-06 21:04:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:41,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:41,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:41,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:04:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:04:41,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:41,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535131689] [2022-04-06 21:04:41,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535131689] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:41,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197188781] [2022-04-06 21:04:41,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:41,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:41,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:41,703 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:41,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 21:04:41,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:41,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:41,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 21:04:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:04:41,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:04:42,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197188781] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:42,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:42,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-04-06 21:04:42,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:42,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [926822086] [2022-04-06 21:04:42,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [926822086] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:42,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:42,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:04:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943557987] [2022-04-06 21:04:42,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:42,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:04:42,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:04:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:04:42,056 INFO L87 Difference]: Start difference. First operand 1370 states and 1514 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:04:43,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:43,586 INFO L93 Difference]: Finished difference Result 1616 states and 1803 transitions. [2022-04-06 21:04:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 21:04:43,586 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2022-04-06 21:04:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:43,593 INFO L225 Difference]: With dead ends: 1616 [2022-04-06 21:04:43,594 INFO L226 Difference]: Without dead ends: 1554 [2022-04-06 21:04:43,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1279, Invalid=3691, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 21:04:43,619 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 120 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:43,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 88 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:04:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-04-06 21:04:44,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1512. [2022-04-06 21:04:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1353 states have (on average 1.1175166297117516) internal successors, (1512), 1453 states have internal predecessors, (1512), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-04-06 21:04:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1671 transitions. [2022-04-06 21:04:44,487 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1671 transitions. Word has length 62 [2022-04-06 21:04:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:44,487 INFO L478 AbstractCegarLoop]: Abstraction has 1512 states and 1671 transitions. [2022-04-06 21:04:44,487 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:04:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1671 transitions. [2022-04-06 21:04:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 21:04:44,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:44,501 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:44,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-04-06 21:04:44,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-04-06 21:04:44,717 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:44,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash 494600014, now seen corresponding path program 225 times [2022-04-06 21:04:44,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:44,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265858468] [2022-04-06 21:04:44,718 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:44,718 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash 494600014, now seen corresponding path program 226 times [2022-04-06 21:04:44,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:44,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743996786] [2022-04-06 21:04:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:44,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:44,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:04:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:04:44,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743996786] [2022-04-06 21:04:44,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743996786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873993326] [2022-04-06 21:04:44,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:44,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:44,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:44,836 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:44,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 21:04:44,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:44,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:44,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 21:04:44,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:04:45,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 21:04:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873993326] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:45,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:45,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-04-06 21:04:45,195 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:45,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265858468] [2022-04-06 21:04:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265858468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:45,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:45,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:04:45,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987593067] [2022-04-06 21:04:45,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:45,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:04:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:04:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:04:45,196 INFO L87 Difference]: Start difference. First operand 1512 states and 1671 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:46,610 INFO L93 Difference]: Finished difference Result 2555 states and 2807 transitions. [2022-04-06 21:04:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 21:04:46,611 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-04-06 21:04:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:46,709 INFO L225 Difference]: With dead ends: 2555 [2022-04-06 21:04:46,709 INFO L226 Difference]: Without dead ends: 1696 [2022-04-06 21:04:46,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=3691, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 21:04:46,734 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 152 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:46,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 63 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-04-06 21:04:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1654. [2022-04-06 21:04:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-04-06 21:04:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1828 transitions. [2022-04-06 21:04:47,688 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1828 transitions. Word has length 62 [2022-04-06 21:04:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:47,688 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1828 transitions. [2022-04-06 21:04:47,688 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1828 transitions. [2022-04-06 21:04:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:04:47,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:47,702 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:47,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:47,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:47,915 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1491597194, now seen corresponding path program 227 times [2022-04-06 21:04:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:47,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662078263] [2022-04-06 21:04:47,916 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:47,916 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1491597194, now seen corresponding path program 228 times [2022-04-06 21:04:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:47,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013819029] [2022-04-06 21:04:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:47,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:47,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:47,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:48,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:04:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:04:48,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:48,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013819029] [2022-04-06 21:04:48,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013819029] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:48,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344299547] [2022-04-06 21:04:48,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:48,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:48,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:48,709 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:48,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 21:04:48,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 21:04:48,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:48,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 21:04:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:04:49,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:04:49,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344299547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:49,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:49,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 51 [2022-04-06 21:04:49,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:49,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662078263] [2022-04-06 21:04:49,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662078263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:49,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:49,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:04:49,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135103584] [2022-04-06 21:04:49,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:49,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:04:49,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:49,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:04:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2441, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:04:49,572 INFO L87 Difference]: Start difference. First operand 1654 states and 1828 transitions. Second operand has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:54,012 INFO L93 Difference]: Finished difference Result 1824 states and 2017 transitions. [2022-04-06 21:04:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:04:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 21:04:54,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:54,030 INFO L225 Difference]: With dead ends: 1824 [2022-04-06 21:04:54,031 INFO L226 Difference]: Without dead ends: 1818 [2022-04-06 21:04:54,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=310, Invalid=8432, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 21:04:54,058 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 354 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 10366 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 10430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 10366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:54,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 373 Invalid, 10430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 10366 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 21:04:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-04-06 21:04:55,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1670. [2022-04-06 21:04:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1508 states have (on average 1.1167108753315649) internal successors, (1684), 1610 states have internal predecessors, (1684), 56 states have call successors, (56), 5 states have call predecessors, (56), 105 states have return successors, (107), 54 states have call predecessors, (107), 54 states have call successors, (107) [2022-04-06 21:04:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 1847 transitions. [2022-04-06 21:04:55,103 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 1847 transitions. Word has length 63 [2022-04-06 21:04:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:55,103 INFO L478 AbstractCegarLoop]: Abstraction has 1670 states and 1847 transitions. [2022-04-06 21:04:55,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:04:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 1847 transitions. [2022-04-06 21:04:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:04:55,118 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:55,118 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:55,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:55,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-06 21:04:55,327 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:55,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1845015914, now seen corresponding path program 229 times [2022-04-06 21:04:55,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:55,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2117588822] [2022-04-06 21:04:55,328 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:55,328 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:55,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1845015914, now seen corresponding path program 230 times [2022-04-06 21:04:55,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:55,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854237089] [2022-04-06 21:04:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:55,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:55,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:55,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:04:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:55,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:04:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:04:55,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:55,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854237089] [2022-04-06 21:04:55,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854237089] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:55,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083463410] [2022-04-06 21:04:55,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:55,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:55,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:55,961 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:55,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 21:04:56,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:56,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:56,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:04:56,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:04:56,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:04:56,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083463410] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:56,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:56,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 51 [2022-04-06 21:04:56,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:56,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2117588822] [2022-04-06 21:04:56,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2117588822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:56,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:56,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:04:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508115252] [2022-04-06 21:04:56,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:56,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:04:56,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:56,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:04:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2437, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:04:56,831 INFO L87 Difference]: Start difference. First operand 1670 states and 1847 transitions. Second operand has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:00,815 INFO L93 Difference]: Finished difference Result 1676 states and 1852 transitions. [2022-04-06 21:05:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:05:00,815 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 21:05:00,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:00,837 INFO L225 Difference]: With dead ends: 1676 [2022-04-06 21:05:00,837 INFO L226 Difference]: Without dead ends: 1654 [2022-04-06 21:05:00,859 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=8060, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 21:05:00,859 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 275 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 8682 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 8729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 8682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:00,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 343 Invalid, 8729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 8682 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 21:05:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-04-06 21:05:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1654. [2022-04-06 21:05:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-04-06 21:05:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1829 transitions. [2022-04-06 21:05:01,970 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1829 transitions. Word has length 63 [2022-04-06 21:05:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:01,970 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1829 transitions. [2022-04-06 21:05:01,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1829 transitions. [2022-04-06 21:05:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:05:01,985 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:01,985 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:02,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:02,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-04-06 21:05:02,199 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:02,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:02,200 INFO L85 PathProgramCache]: Analyzing trace with hash 891221002, now seen corresponding path program 231 times [2022-04-06 21:05:02,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:02,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675479732] [2022-04-06 21:05:02,200 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:02,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:02,200 INFO L85 PathProgramCache]: Analyzing trace with hash 891221002, now seen corresponding path program 232 times [2022-04-06 21:05:02,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:02,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615745389] [2022-04-06 21:05:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:02,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:02,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:02,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:02,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:05:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:05:02,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615745389] [2022-04-06 21:05:02,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615745389] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515240844] [2022-04-06 21:05:02,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:05:02,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:02,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:02,825 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:02,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 21:05:02,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:05:02,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:02,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:05:02,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:05:03,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:05:03,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515240844] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:03,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:03,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 51 [2022-04-06 21:05:03,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:03,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [675479732] [2022-04-06 21:05:03,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [675479732] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:03,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:03,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:05:03,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121708363] [2022-04-06 21:05:03,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:03,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:05:03,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:05:03,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2433, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:05:03,744 INFO L87 Difference]: Start difference. First operand 1654 states and 1829 transitions. Second operand has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:07,245 INFO L93 Difference]: Finished difference Result 1660 states and 1834 transitions. [2022-04-06 21:05:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:05:07,245 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 21:05:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:07,256 INFO L225 Difference]: With dead ends: 1660 [2022-04-06 21:05:07,256 INFO L226 Difference]: Without dead ends: 1636 [2022-04-06 21:05:07,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=314, Invalid=7696, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:05:07,284 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 236 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 7118 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 7118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:07,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 313 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 7118 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 21:05:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-04-06 21:05:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2022-04-06 21:05:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1480 states have (on average 1.1162162162162161) internal successors, (1652), 1578 states have internal predecessors, (1652), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (103), 52 states have call predecessors, (103), 52 states have call successors, (103) [2022-04-06 21:05:08,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1809 transitions. [2022-04-06 21:05:08,237 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1809 transitions. Word has length 63 [2022-04-06 21:05:08,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:08,237 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 1809 transitions. [2022-04-06 21:05:08,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1809 transitions. [2022-04-06 21:05:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:05:08,250 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:08,250 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:08,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:08,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-06 21:05:08,463 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:08,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1351141142, now seen corresponding path program 233 times [2022-04-06 21:05:08,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:08,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [382320844] [2022-04-06 21:05:08,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:08,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:08,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1351141142, now seen corresponding path program 234 times [2022-04-06 21:05:08,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041974403] [2022-04-06 21:05:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:08,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:08,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:08,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:05:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:05:08,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:08,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041974403] [2022-04-06 21:05:08,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041974403] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:08,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866393365] [2022-04-06 21:05:08,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:05:08,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:08,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:08,980 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:08,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 21:05:09,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:05:09,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:09,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:05:09,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:05:09,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:05:09,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866393365] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:09,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:09,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 51 [2022-04-06 21:05:09,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [382320844] [2022-04-06 21:05:09,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [382320844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:09,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:09,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:05:09,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946697807] [2022-04-06 21:05:09,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:09,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:05:09,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:05:09,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2429, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:05:09,707 INFO L87 Difference]: Start difference. First operand 1636 states and 1809 transitions. Second operand has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:12,297 INFO L93 Difference]: Finished difference Result 1642 states and 1814 transitions. [2022-04-06 21:05:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:05:12,298 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 21:05:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:12,307 INFO L225 Difference]: With dead ends: 1642 [2022-04-06 21:05:12,307 INFO L226 Difference]: Without dead ends: 1616 [2022-04-06 21:05:12,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=316, Invalid=7340, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 21:05:12,351 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 5674 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 5718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:12,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 283 Invalid, 5718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5674 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:05:12,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-04-06 21:05:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1616. [2022-04-06 21:05:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1463 states have (on average 1.1161995898838004) internal successors, (1633), 1559 states have internal predecessors, (1633), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (101), 51 states have call predecessors, (101), 51 states have call successors, (101) [2022-04-06 21:05:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 1787 transitions. [2022-04-06 21:05:13,306 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 1787 transitions. Word has length 63 [2022-04-06 21:05:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:13,306 INFO L478 AbstractCegarLoop]: Abstraction has 1616 states and 1787 transitions. [2022-04-06 21:05:13,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 1787 transitions. [2022-04-06 21:05:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:05:13,321 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:13,321 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:13,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:13,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:13,540 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1646063754, now seen corresponding path program 235 times [2022-04-06 21:05:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:13,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [791569244] [2022-04-06 21:05:13,543 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:13,543 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1646063754, now seen corresponding path program 236 times [2022-04-06 21:05:13,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:13,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429860050] [2022-04-06 21:05:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:13,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:13,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:13,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:05:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:05:13,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429860050] [2022-04-06 21:05:13,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429860050] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260990536] [2022-04-06 21:05:13,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:05:13,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:13,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:13,925 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:13,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 21:05:14,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:05:14,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:14,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:05:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:05:14,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:05:14,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260990536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:14,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:14,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 51 [2022-04-06 21:05:14,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [791569244] [2022-04-06 21:05:14,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [791569244] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:14,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:14,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:05:14,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095820259] [2022-04-06 21:05:14,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:14,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:05:14,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:05:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2425, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:05:14,701 INFO L87 Difference]: Start difference. First operand 1616 states and 1787 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:17,391 INFO L93 Difference]: Finished difference Result 1622 states and 1792 transitions. [2022-04-06 21:05:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:05:17,392 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 21:05:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:17,400 INFO L225 Difference]: With dead ends: 1622 [2022-04-06 21:05:17,401 INFO L226 Difference]: Without dead ends: 1594 [2022-04-06 21:05:17,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=6992, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 21:05:17,422 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4350 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 4392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:17,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 253 Invalid, 4392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4350 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:05:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-04-06 21:05:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2022-04-06 21:05:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1444 states have (on average 1.1163434903047091) internal successors, (1612), 1538 states have internal predecessors, (1612), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (99), 50 states have call predecessors, (99), 50 states have call successors, (99) [2022-04-06 21:05:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 1763 transitions. [2022-04-06 21:05:18,345 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 1763 transitions. Word has length 63 [2022-04-06 21:05:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:18,345 INFO L478 AbstractCegarLoop]: Abstraction has 1594 states and 1763 transitions. [2022-04-06 21:05:18,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 1763 transitions. [2022-04-06 21:05:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:05:18,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:18,357 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:18,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:18,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-04-06 21:05:18,574 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:18,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1439349866, now seen corresponding path program 237 times [2022-04-06 21:05:18,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:18,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733243697] [2022-04-06 21:05:18,575 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:18,575 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1439349866, now seen corresponding path program 238 times [2022-04-06 21:05:18,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:18,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584624098] [2022-04-06 21:05:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:18,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:18,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:18,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:05:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:05:19,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:19,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584624098] [2022-04-06 21:05:19,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584624098] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:19,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396025903] [2022-04-06 21:05:19,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:05:19,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:19,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:19,152 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:19,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 21:05:19,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:05:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:05:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:05:20,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:05:20,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396025903] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:20,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:20,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 51 [2022-04-06 21:05:20,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:20,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733243697] [2022-04-06 21:05:20,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733243697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:20,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:20,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:05:20,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045708273] [2022-04-06 21:05:20,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:20,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:05:20,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:05:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2421, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:05:20,300 INFO L87 Difference]: Start difference. First operand 1594 states and 1763 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:22,339 INFO L93 Difference]: Finished difference Result 1600 states and 1768 transitions. [2022-04-06 21:05:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:05:22,340 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 21:05:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:22,347 INFO L225 Difference]: With dead ends: 1600 [2022-04-06 21:05:22,347 INFO L226 Difference]: Without dead ends: 1570 [2022-04-06 21:05:22,371 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=320, Invalid=6652, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:05:22,371 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 120 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3055 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:22,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 220 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3055 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:05:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-04-06 21:05:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1570. [2022-04-06 21:05:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1423 states have (on average 1.1166549543218551) internal successors, (1589), 1515 states have internal predecessors, (1589), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (97), 49 states have call predecessors, (97), 49 states have call successors, (97) [2022-04-06 21:05:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 1737 transitions. [2022-04-06 21:05:23,309 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 1737 transitions. Word has length 63 [2022-04-06 21:05:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:23,309 INFO L478 AbstractCegarLoop]: Abstraction has 1570 states and 1737 transitions. [2022-04-06 21:05:23,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 1737 transitions. [2022-04-06 21:05:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:05:23,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:23,322 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:23,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-04-06 21:05:23,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-06 21:05:23,538 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1543877185, now seen corresponding path program 239 times [2022-04-06 21:05:23,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:23,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955803665] [2022-04-06 21:05:23,540 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:23,540 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1543877185, now seen corresponding path program 240 times [2022-04-06 21:05:23,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:23,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226667475] [2022-04-06 21:05:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:23,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:23,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:23,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:23,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 21:05:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 21:05:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:23,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226667475] [2022-04-06 21:05:23,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226667475] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:23,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574676720] [2022-04-06 21:05:23,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:05:23,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:23,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:23,882 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:23,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 21:05:24,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:05:24,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:24,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 21:05:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 21:05:24,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 21:05:25,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574676720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:25,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:25,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-04-06 21:05:25,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:25,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955803665] [2022-04-06 21:05:25,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955803665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:25,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:25,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:05:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033355182] [2022-04-06 21:05:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:25,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:05:25,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:25,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:05:25,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:05:25,324 INFO L87 Difference]: Start difference. First operand 1570 states and 1737 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:27,863 INFO L93 Difference]: Finished difference Result 1690 states and 1883 transitions. [2022-04-06 21:05:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:05:27,864 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 21:05:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:27,928 INFO L225 Difference]: With dead ends: 1690 [2022-04-06 21:05:27,928 INFO L226 Difference]: Without dead ends: 1670 [2022-04-06 21:05:27,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=351, Invalid=5501, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 21:05:27,949 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 237 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3243 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 3269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:27,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 211 Invalid, 3269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3243 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:05:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-04-06 21:05:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1665. [2022-04-06 21:05:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1479 states have (on average 1.1115618661257607) internal successors, (1644), 1597 states have internal predecessors, (1644), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-04-06 21:05:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 1844 transitions. [2022-04-06 21:05:28,943 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 1844 transitions. Word has length 63 [2022-04-06 21:05:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:28,943 INFO L478 AbstractCegarLoop]: Abstraction has 1665 states and 1844 transitions. [2022-04-06 21:05:28,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 1844 transitions. [2022-04-06 21:05:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:05:28,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:28,958 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:28,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:29,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-04-06 21:05:29,174 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:29,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1599476470, now seen corresponding path program 241 times [2022-04-06 21:05:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1444799114] [2022-04-06 21:05:29,175 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:29,175 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1599476470, now seen corresponding path program 242 times [2022-04-06 21:05:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:29,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390328811] [2022-04-06 21:05:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:29,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:29,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:29,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:29,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:05:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:05:29,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:29,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390328811] [2022-04-06 21:05:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390328811] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:29,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173287853] [2022-04-06 21:05:29,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:05:29,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:29,671 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:29,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 21:05:29,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:05:29,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:05:29,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:05:30,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:05:30,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173287853] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:30,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:30,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 51 [2022-04-06 21:05:30,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:30,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1444799114] [2022-04-06 21:05:30,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1444799114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:30,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:30,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:05:30,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331273484] [2022-04-06 21:05:30,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:30,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:05:30,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:30,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:05:30,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2417, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:05:30,868 INFO L87 Difference]: Start difference. First operand 1665 states and 1844 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:32,854 INFO L93 Difference]: Finished difference Result 1683 states and 1866 transitions. [2022-04-06 21:05:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:05:32,854 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 21:05:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:32,870 INFO L225 Difference]: With dead ends: 1683 [2022-04-06 21:05:32,871 INFO L226 Difference]: Without dead ends: 1663 [2022-04-06 21:05:32,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=322, Invalid=6320, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 21:05:32,891 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:32,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 193 Invalid, 2137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:05:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-04-06 21:05:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1658. [2022-04-06 21:05:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1472 states have (on average 1.1127717391304348) internal successors, (1638), 1590 states have internal predecessors, (1638), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-04-06 21:05:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 1838 transitions. [2022-04-06 21:05:33,873 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 1838 transitions. Word has length 63 [2022-04-06 21:05:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:33,873 INFO L478 AbstractCegarLoop]: Abstraction has 1658 states and 1838 transitions. [2022-04-06 21:05:33,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 1838 transitions. [2022-04-06 21:05:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:05:33,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:33,889 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:33,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:34,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:34,106 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1883683963, now seen corresponding path program 243 times [2022-04-06 21:05:34,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:34,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1280940605] [2022-04-06 21:05:34,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:34,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:34,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1883683963, now seen corresponding path program 244 times [2022-04-06 21:05:34,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:34,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966593214] [2022-04-06 21:05:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:34,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:34,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:34,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:34,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:05:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 21:05:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966593214] [2022-04-06 21:05:34,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966593214] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164435076] [2022-04-06 21:05:34,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:05:34,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:34,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:34,416 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:34,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 21:05:34,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:05:34,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:34,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 21:05:34,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 21:05:35,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 21:05:35,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164435076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:35,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:35,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-04-06 21:05:35,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:35,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1280940605] [2022-04-06 21:05:35,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1280940605] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:35,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:35,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:05:35,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461319639] [2022-04-06 21:05:35,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:35,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:05:35,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:05:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:05:35,778 INFO L87 Difference]: Start difference. First operand 1658 states and 1838 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:38,426 INFO L93 Difference]: Finished difference Result 1672 states and 1851 transitions. [2022-04-06 21:05:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:05:38,426 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 21:05:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:38,434 INFO L225 Difference]: With dead ends: 1672 [2022-04-06 21:05:38,434 INFO L226 Difference]: Without dead ends: 1642 [2022-04-06 21:05:38,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=351, Invalid=5501, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 21:05:38,455 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 247 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:38,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 210 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3285 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:05:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-04-06 21:05:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2022-04-06 21:05:39,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1454 states have (on average 1.1127922971114168) internal successors, (1618), 1572 states have internal predecessors, (1618), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (124), 62 states have call predecessors, (124), 62 states have call successors, (124) [2022-04-06 21:05:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1806 transitions. [2022-04-06 21:05:39,445 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1806 transitions. Word has length 63 [2022-04-06 21:05:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:39,445 INFO L478 AbstractCegarLoop]: Abstraction has 1640 states and 1806 transitions. [2022-04-06 21:05:39,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:39,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1806 transitions. [2022-04-06 21:05:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 21:05:39,461 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:39,461 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:39,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:39,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:39,677 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:39,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2024599665, now seen corresponding path program 245 times [2022-04-06 21:05:39,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:39,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1650681674] [2022-04-06 21:05:39,678 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:39,678 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:39,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2024599665, now seen corresponding path program 246 times [2022-04-06 21:05:39,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:39,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028211619] [2022-04-06 21:05:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:39,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:39,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:39,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:39,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:05:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:05:40,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:40,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028211619] [2022-04-06 21:05:40,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028211619] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:40,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286373907] [2022-04-06 21:05:40,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:05:40,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:40,367 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:40,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 21:05:40,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 21:05:40,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:40,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 21:05:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:05:41,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:05:43,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286373907] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:43,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:43,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-04-06 21:05:43,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:43,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1650681674] [2022-04-06 21:05:43,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1650681674] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:43,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:43,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:05:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646469704] [2022-04-06 21:05:43,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:43,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:05:43,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:43,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:05:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 21:05:43,762 INFO L87 Difference]: Start difference. First operand 1640 states and 1806 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:48,114 INFO L93 Difference]: Finished difference Result 1814 states and 2009 transitions. [2022-04-06 21:05:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:05:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-04-06 21:05:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:48,162 INFO L225 Difference]: With dead ends: 1814 [2022-04-06 21:05:48,162 INFO L226 Difference]: Without dead ends: 1800 [2022-04-06 21:05:48,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=553, Invalid=16217, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 21:05:48,187 INFO L913 BasicCegarLoop]: 166 mSDtfsCounter, 336 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 8468 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 8506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 8468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:48,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 338 Invalid, 8506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 8468 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 21:05:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-04-06 21:05:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1791. [2022-04-06 21:05:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1587 states have (on average 1.1121613106490233) internal successors, (1765), 1717 states have internal predecessors, (1765), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (142), 68 states have call predecessors, (142), 68 states have call successors, (142) [2022-04-06 21:05:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 1977 transitions. [2022-04-06 21:05:49,372 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 1977 transitions. Word has length 64 [2022-04-06 21:05:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:49,372 INFO L478 AbstractCegarLoop]: Abstraction has 1791 states and 1977 transitions. [2022-04-06 21:05:49,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 1977 transitions. [2022-04-06 21:05:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 21:05:49,389 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:49,389 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:49,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:49,606 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:49,606 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1465378380, now seen corresponding path program 247 times [2022-04-06 21:05:49,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [588703408] [2022-04-06 21:05:49,607 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:49,607 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:49,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1465378380, now seen corresponding path program 248 times [2022-04-06 21:05:49,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:49,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662289417] [2022-04-06 21:05:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:49,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:49,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:49,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:49,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:05:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:05:50,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:50,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662289417] [2022-04-06 21:05:50,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662289417] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:50,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138764430] [2022-04-06 21:05:50,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:05:50,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:50,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:50,229 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:50,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 21:05:50,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:05:50,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 21:05:50,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:05:51,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:05:53,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138764430] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:53,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:53,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-04-06 21:05:53,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:53,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [588703408] [2022-04-06 21:05:53,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [588703408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:53,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:53,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:05:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88809995] [2022-04-06 21:05:53,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:53,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:05:53,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:53,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:05:53,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 21:05:53,379 INFO L87 Difference]: Start difference. First operand 1791 states and 1977 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:57,528 INFO L93 Difference]: Finished difference Result 1806 states and 1992 transitions. [2022-04-06 21:05:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:05:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-04-06 21:05:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:57,538 INFO L225 Difference]: With dead ends: 1806 [2022-04-06 21:05:57,538 INFO L226 Difference]: Without dead ends: 1794 [2022-04-06 21:05:57,563 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=553, Invalid=16217, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 21:05:57,563 INFO L913 BasicCegarLoop]: 168 mSDtfsCounter, 356 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 8535 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 8572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 8535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:57,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 340 Invalid, 8572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 8535 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 21:05:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-04-06 21:05:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1792. [2022-04-06 21:05:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1588 states have (on average 1.1120906801007557) internal successors, (1766), 1718 states have internal predecessors, (1766), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-04-06 21:05:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 1971 transitions. [2022-04-06 21:05:58,773 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 1971 transitions. Word has length 64 [2022-04-06 21:05:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:58,773 INFO L478 AbstractCegarLoop]: Abstraction has 1792 states and 1971 transitions. [2022-04-06 21:05:58,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:05:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 1971 transitions. [2022-04-06 21:05:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 21:05:58,793 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:58,793 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:58,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-04-06 21:05:59,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-04-06 21:05:59,007 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1431947726, now seen corresponding path program 249 times [2022-04-06 21:05:59,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:59,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [908427692] [2022-04-06 21:05:59,008 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:59,008 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1431947726, now seen corresponding path program 250 times [2022-04-06 21:05:59,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:59,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713541989] [2022-04-06 21:05:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:59,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:59,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:59,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:05:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:59,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 21:05:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:05:59,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713541989] [2022-04-06 21:05:59,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713541989] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974347090] [2022-04-06 21:05:59,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:05:59,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:59,156 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:59,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 21:05:59,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:05:59,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:59,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:05:59,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:05:59,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:05:59,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974347090] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:59,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:59,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-04-06 21:05:59,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:59,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [908427692] [2022-04-06 21:05:59,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [908427692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:59,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:59,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:05:59,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765597940] [2022-04-06 21:05:59,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:59,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:05:59,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:59,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:05:59,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:05:59,565 INFO L87 Difference]: Start difference. First operand 1792 states and 1971 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:01,361 INFO L93 Difference]: Finished difference Result 2699 states and 2926 transitions. [2022-04-06 21:06:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:06:01,362 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-04-06 21:06:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:01,429 INFO L225 Difference]: With dead ends: 2699 [2022-04-06 21:06:01,429 INFO L226 Difference]: Without dead ends: 1795 [2022-04-06 21:06:01,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1573, Invalid=3683, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 21:06:01,461 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:01,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 97 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:06:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-04-06 21:06:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1787. [2022-04-06 21:06:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1589 states have (on average 1.1095028319697924) internal successors, (1763), 1715 states have internal predecessors, (1763), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-04-06 21:06:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 1960 transitions. [2022-04-06 21:06:02,675 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 1960 transitions. Word has length 64 [2022-04-06 21:06:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:02,675 INFO L478 AbstractCegarLoop]: Abstraction has 1787 states and 1960 transitions. [2022-04-06 21:06:02,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 1960 transitions. [2022-04-06 21:06:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 21:06:02,692 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:02,692 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:02,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:02,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-06 21:06:02,909 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:02,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:02,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1759884717, now seen corresponding path program 251 times [2022-04-06 21:06:02,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:02,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437207084] [2022-04-06 21:06:02,910 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:02,910 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:02,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1759884717, now seen corresponding path program 252 times [2022-04-06 21:06:02,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:02,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204749972] [2022-04-06 21:06:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:02,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:02,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:02,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:06:03,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:03,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204749972] [2022-04-06 21:06:03,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204749972] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:03,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194068643] [2022-04-06 21:06:03,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:03,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:03,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:03,049 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:03,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 21:06:03,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:06:03,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:03,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:06:03,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:06:03,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:06:03,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194068643] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:03,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:03,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-04-06 21:06:03,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:03,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437207084] [2022-04-06 21:06:03,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437207084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:03,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:03,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:06:03,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591720431] [2022-04-06 21:06:03,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:03,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:06:03,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:06:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:06:03,462 INFO L87 Difference]: Start difference. First operand 1787 states and 1960 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:06:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:05,368 INFO L93 Difference]: Finished difference Result 1853 states and 2040 transitions. [2022-04-06 21:06:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:06:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-04-06 21:06:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:05,378 INFO L225 Difference]: With dead ends: 1853 [2022-04-06 21:06:05,378 INFO L226 Difference]: Without dead ends: 1802 [2022-04-06 21:06:05,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1573, Invalid=3683, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 21:06:05,407 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 179 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:05,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 73 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:06:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-04-06 21:06:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-04-06 21:06:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-04-06 21:06:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1975 transitions. [2022-04-06 21:06:06,615 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1975 transitions. Word has length 64 [2022-04-06 21:06:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:06,615 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1975 transitions. [2022-04-06 21:06:06,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:06:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1975 transitions. [2022-04-06 21:06:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 21:06:06,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:06,633 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:06,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:06,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-06 21:06:06,850 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1457584397, now seen corresponding path program 253 times [2022-04-06 21:06:06,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:06,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1351543055] [2022-04-06 21:06:06,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:06,851 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1457584397, now seen corresponding path program 254 times [2022-04-06 21:06:06,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:06,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179551218] [2022-04-06 21:06:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:06,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:06,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:06,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:07,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:06:07,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:07,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179551218] [2022-04-06 21:06:07,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179551218] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:07,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544906306] [2022-04-06 21:06:07,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:07,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:07,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:07,370 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:07,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 21:06:07,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:07,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:07,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 21:06:07,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:06:07,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:06:07,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544906306] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:07,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:07,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 53 [2022-04-06 21:06:07,909 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:07,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1351543055] [2022-04-06 21:06:07,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1351543055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:07,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:07,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 21:06:07,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229837037] [2022-04-06 21:06:07,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:07,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 21:06:07,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:07,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 21:06:07,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2643, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:06:07,911 INFO L87 Difference]: Start difference. First operand 1802 states and 1975 transitions. Second operand has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:12,142 INFO L93 Difference]: Finished difference Result 1980 states and 2172 transitions. [2022-04-06 21:06:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:06:12,142 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-06 21:06:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:12,164 INFO L225 Difference]: With dead ends: 1980 [2022-04-06 21:06:12,164 INFO L226 Difference]: Without dead ends: 1974 [2022-04-06 21:06:12,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=322, Invalid=9184, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 21:06:12,196 INFO L913 BasicCegarLoop]: 169 mSDtfsCounter, 375 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 11474 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 11542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 11474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:12,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 391 Invalid, 11542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 11474 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 21:06:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-04-06 21:06:13,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1818. [2022-04-06 21:06:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1617 states have (on average 1.1088435374149659) internal successors, (1793), 1745 states have internal predecessors, (1793), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (132), 67 states have call predecessors, (132), 67 states have call successors, (132) [2022-04-06 21:06:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 1994 transitions. [2022-04-06 21:06:13,361 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 1994 transitions. Word has length 65 [2022-04-06 21:06:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:13,361 INFO L478 AbstractCegarLoop]: Abstraction has 1818 states and 1994 transitions. [2022-04-06 21:06:13,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 1994 transitions. [2022-04-06 21:06:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 21:06:13,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:13,379 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:13,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:13,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-06 21:06:13,595 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1334309325, now seen corresponding path program 255 times [2022-04-06 21:06:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:13,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527142359] [2022-04-06 21:06:13,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:13,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:13,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1334309325, now seen corresponding path program 256 times [2022-04-06 21:06:13,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:13,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476680757] [2022-04-06 21:06:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:13,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:13,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:13,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:06:14,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:14,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476680757] [2022-04-06 21:06:14,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476680757] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:14,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23487618] [2022-04-06 21:06:14,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:14,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:14,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:14,349 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:14,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 21:06:14,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:14,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:14,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 21:06:14,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:06:15,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:06:15,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23487618] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:15,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:15,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 53 [2022-04-06 21:06:15,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:15,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527142359] [2022-04-06 21:06:15,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527142359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:15,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:15,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:06:15,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349309211] [2022-04-06 21:06:15,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:15,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:06:15,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:06:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2639, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:06:15,345 INFO L87 Difference]: Start difference. First operand 1818 states and 1994 transitions. Second operand has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:20,108 INFO L93 Difference]: Finished difference Result 1824 states and 1999 transitions. [2022-04-06 21:06:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:06:20,109 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-06 21:06:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:20,119 INFO L225 Difference]: With dead ends: 1824 [2022-04-06 21:06:20,120 INFO L226 Difference]: Without dead ends: 1802 [2022-04-06 21:06:20,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=324, Invalid=8796, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 21:06:20,151 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 290 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 9950 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 9997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 9950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:20,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 366 Invalid, 9997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 9950 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 21:06:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-04-06 21:06:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-04-06 21:06:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (130), 66 states have call predecessors, (130), 66 states have call successors, (130) [2022-04-06 21:06:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1976 transitions. [2022-04-06 21:06:21,393 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1976 transitions. Word has length 65 [2022-04-06 21:06:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:21,393 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1976 transitions. [2022-04-06 21:06:21,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1976 transitions. [2022-04-06 21:06:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 21:06:21,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:21,413 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:21,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:21,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-04-06 21:06:21,628 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:21,628 INFO L85 PathProgramCache]: Analyzing trace with hash -848414451, now seen corresponding path program 257 times [2022-04-06 21:06:21,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:21,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [164498856] [2022-04-06 21:06:21,629 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:21,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash -848414451, now seen corresponding path program 258 times [2022-04-06 21:06:21,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:21,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694928020] [2022-04-06 21:06:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:21,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:21,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:21,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:21,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:06:22,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:22,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694928020] [2022-04-06 21:06:22,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694928020] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:22,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554383696] [2022-04-06 21:06:22,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:22,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:22,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:22,313 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:22,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 21:06:22,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:06:22,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:22,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:06:22,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:06:22,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:06:23,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554383696] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:23,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:23,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 53 [2022-04-06 21:06:23,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [164498856] [2022-04-06 21:06:23,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [164498856] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:23,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:23,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:06:23,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997760438] [2022-04-06 21:06:23,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:23,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:06:23,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:06:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2635, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:06:23,242 INFO L87 Difference]: Start difference. First operand 1802 states and 1976 transitions. Second operand has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:26,856 INFO L93 Difference]: Finished difference Result 1808 states and 1981 transitions. [2022-04-06 21:06:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:06:26,856 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-06 21:06:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:26,866 INFO L225 Difference]: With dead ends: 1808 [2022-04-06 21:06:26,867 INFO L226 Difference]: Without dead ends: 1784 [2022-04-06 21:06:26,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=326, Invalid=8416, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 21:06:26,894 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 251 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 8286 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 8332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 8286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:26,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 336 Invalid, 8332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 8286 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 21:06:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-04-06 21:06:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1784. [2022-04-06 21:06:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1589 states have (on average 1.1082441787287602) internal successors, (1761), 1713 states have internal predecessors, (1761), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (128), 65 states have call predecessors, (128), 65 states have call successors, (128) [2022-04-06 21:06:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1956 transitions. [2022-04-06 21:06:28,112 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1956 transitions. Word has length 65 [2022-04-06 21:06:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:28,112 INFO L478 AbstractCegarLoop]: Abstraction has 1784 states and 1956 transitions. [2022-04-06 21:06:28,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1956 transitions. [2022-04-06 21:06:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 21:06:28,129 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:28,129 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:28,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-04-06 21:06:28,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-04-06 21:06:28,343 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash 675131853, now seen corresponding path program 259 times [2022-04-06 21:06:28,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:28,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775143837] [2022-04-06 21:06:28,344 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:28,344 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash 675131853, now seen corresponding path program 260 times [2022-04-06 21:06:28,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:28,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245328970] [2022-04-06 21:06:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:28,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:28,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:28,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:28,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:06:28,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:28,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245328970] [2022-04-06 21:06:28,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245328970] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:28,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793547270] [2022-04-06 21:06:28,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:28,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:28,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:28,768 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:28,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 21:06:28,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:28,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:28,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:06:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:06:29,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:06:29,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793547270] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:29,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:29,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 53 [2022-04-06 21:06:29,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:29,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775143837] [2022-04-06 21:06:29,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775143837] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:29,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:29,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:06:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683306573] [2022-04-06 21:06:29,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:29,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:06:29,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:06:29,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2631, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:06:29,528 INFO L87 Difference]: Start difference. First operand 1784 states and 1956 transitions. Second operand has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:33,456 INFO L93 Difference]: Finished difference Result 1790 states and 1961 transitions. [2022-04-06 21:06:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:06:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-06 21:06:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:33,465 INFO L225 Difference]: With dead ends: 1790 [2022-04-06 21:06:33,465 INFO L226 Difference]: Without dead ends: 1764 [2022-04-06 21:06:33,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=328, Invalid=8044, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 21:06:33,491 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 6786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:33,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 306 Invalid, 6786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 21:06:33,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-04-06 21:06:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1764. [2022-04-06 21:06:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1572 states have (on average 1.1081424936386768) internal successors, (1742), 1694 states have internal predecessors, (1742), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (126), 64 states have call predecessors, (126), 64 states have call successors, (126) [2022-04-06 21:06:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1934 transitions. [2022-04-06 21:06:34,630 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1934 transitions. Word has length 65 [2022-04-06 21:06:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:34,630 INFO L478 AbstractCegarLoop]: Abstraction has 1764 states and 1934 transitions. [2022-04-06 21:06:34,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1934 transitions. [2022-04-06 21:06:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 21:06:34,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:34,647 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:34,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-04-06 21:06:34,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:34,864 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:34,864 INFO L85 PathProgramCache]: Analyzing trace with hash -294291187, now seen corresponding path program 261 times [2022-04-06 21:06:34,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:34,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1701212659] [2022-04-06 21:06:34,865 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:34,865 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:34,865 INFO L85 PathProgramCache]: Analyzing trace with hash -294291187, now seen corresponding path program 262 times [2022-04-06 21:06:34,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:34,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260236733] [2022-04-06 21:06:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:34,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:34,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:34,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:35,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:06:35,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260236733] [2022-04-06 21:06:35,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260236733] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220023357] [2022-04-06 21:06:35,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:35,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:35,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:35,514 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:35,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 21:06:35,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:35,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:06:35,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:06:36,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:06:36,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220023357] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:36,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:36,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 53 [2022-04-06 21:06:36,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:36,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1701212659] [2022-04-06 21:06:36,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1701212659] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:36,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:36,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:06:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858714106] [2022-04-06 21:06:36,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:36,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:06:36,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:36,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:06:36,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2627, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:06:36,658 INFO L87 Difference]: Start difference. First operand 1764 states and 1934 transitions. Second operand has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:40,054 INFO L93 Difference]: Finished difference Result 1770 states and 1939 transitions. [2022-04-06 21:06:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:06:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-06 21:06:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:40,088 INFO L225 Difference]: With dead ends: 1770 [2022-04-06 21:06:40,089 INFO L226 Difference]: Without dead ends: 1742 [2022-04-06 21:06:40,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=330, Invalid=7680, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:06:40,112 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 173 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 5318 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 5360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:40,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 276 Invalid, 5360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5318 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 21:06:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-04-06 21:06:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1742. [2022-04-06 21:06:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1553 states have (on average 1.1081777205408887) internal successors, (1721), 1673 states have internal predecessors, (1721), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (124), 63 states have call predecessors, (124), 63 states have call successors, (124) [2022-04-06 21:06:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 1910 transitions. [2022-04-06 21:06:41,228 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 1910 transitions. Word has length 65 [2022-04-06 21:06:41,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:41,229 INFO L478 AbstractCegarLoop]: Abstraction has 1742 states and 1910 transitions. [2022-04-06 21:06:41,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 1910 transitions. [2022-04-06 21:06:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 21:06:41,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:41,244 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:41,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-04-06 21:06:41,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:41,460 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:41,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1350136269, now seen corresponding path program 263 times [2022-04-06 21:06:41,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:41,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2056614121] [2022-04-06 21:06:41,461 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:41,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:41,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1350136269, now seen corresponding path program 264 times [2022-04-06 21:06:41,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:41,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565148001] [2022-04-06 21:06:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:41,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:41,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:41,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:06:42,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:42,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565148001] [2022-04-06 21:06:42,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565148001] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:42,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867686725] [2022-04-06 21:06:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:42,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:42,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:42,055 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:42,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 21:06:42,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:06:42,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:06:42,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:06:42,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:06:43,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867686725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:43,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:43,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 53 [2022-04-06 21:06:43,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:43,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2056614121] [2022-04-06 21:06:43,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2056614121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:43,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:43,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:06:43,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049674209] [2022-04-06 21:06:43,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:43,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:06:43,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:43,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:06:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2623, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:06:43,089 INFO L87 Difference]: Start difference. First operand 1742 states and 1910 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:45,932 INFO L93 Difference]: Finished difference Result 1748 states and 1915 transitions. [2022-04-06 21:06:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:06:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-06 21:06:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:45,942 INFO L225 Difference]: With dead ends: 1748 [2022-04-06 21:06:45,942 INFO L226 Difference]: Without dead ends: 1718 [2022-04-06 21:06:45,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=332, Invalid=7324, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 21:06:45,965 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4014 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:45,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 246 Invalid, 4054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4014 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 21:06:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-04-06 21:06:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1718. [2022-04-06 21:06:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1532 states have (on average 1.108355091383812) internal successors, (1698), 1650 states have internal predecessors, (1698), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (122), 62 states have call predecessors, (122), 62 states have call successors, (122) [2022-04-06 21:06:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 1884 transitions. [2022-04-06 21:06:47,072 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 1884 transitions. Word has length 65 [2022-04-06 21:06:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:47,072 INFO L478 AbstractCegarLoop]: Abstraction has 1718 states and 1884 transitions. [2022-04-06 21:06:47,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 1884 transitions. [2022-04-06 21:06:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 21:06:47,087 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:47,087 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:47,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-04-06 21:06:47,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:47,303 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1376339699, now seen corresponding path program 265 times [2022-04-06 21:06:47,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:47,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096746599] [2022-04-06 21:06:47,304 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:47,304 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1376339699, now seen corresponding path program 266 times [2022-04-06 21:06:47,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:47,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389018411] [2022-04-06 21:06:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:47,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:47,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:47,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:06:47,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389018411] [2022-04-06 21:06:47,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389018411] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823825004] [2022-04-06 21:06:47,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:47,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:47,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:47,773 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:47,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 21:06:47,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:47,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:47,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:06:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:06:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:06:48,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823825004] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:48,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:48,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 53 [2022-04-06 21:06:48,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:48,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096746599] [2022-04-06 21:06:48,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096746599] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:48,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:48,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:06:48,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515145875] [2022-04-06 21:06:48,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:48,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:06:48,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:06:48,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2619, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:06:48,986 INFO L87 Difference]: Start difference. First operand 1718 states and 1884 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:51,378 INFO L93 Difference]: Finished difference Result 1724 states and 1889 transitions. [2022-04-06 21:06:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:06:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-06 21:06:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:51,387 INFO L225 Difference]: With dead ends: 1724 [2022-04-06 21:06:51,387 INFO L226 Difference]: Without dead ends: 1692 [2022-04-06 21:06:51,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=334, Invalid=6976, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 21:06:51,410 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:51,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 216 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2830 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 21:06:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-04-06 21:06:52,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2022-04-06 21:06:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1509 states have (on average 1.1086812458581843) internal successors, (1673), 1625 states have internal predecessors, (1673), 63 states have call successors, (63), 5 states have call predecessors, (63), 119 states have return successors, (120), 61 states have call predecessors, (120), 61 states have call successors, (120) [2022-04-06 21:06:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 1856 transitions. [2022-04-06 21:06:52,502 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 1856 transitions. Word has length 65 [2022-04-06 21:06:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:52,502 INFO L478 AbstractCegarLoop]: Abstraction has 1692 states and 1856 transitions. [2022-04-06 21:06:52,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 1856 transitions. [2022-04-06 21:06:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 21:06:52,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:52,517 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:52,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:52,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:52,727 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash 70988237, now seen corresponding path program 267 times [2022-04-06 21:06:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:52,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916131379] [2022-04-06 21:06:52,728 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:52,728 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:52,729 INFO L85 PathProgramCache]: Analyzing trace with hash 70988237, now seen corresponding path program 268 times [2022-04-06 21:06:52,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:52,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330642731] [2022-04-06 21:06:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:52,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:52,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:52,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:52,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:06:53,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330642731] [2022-04-06 21:06:53,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330642731] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412366105] [2022-04-06 21:06:53,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:53,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:53,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:53,264 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:53,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 21:06:53,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:53,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:06:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:06:54,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:06:54,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412366105] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:54,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:54,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 53 [2022-04-06 21:06:54,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:54,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916131379] [2022-04-06 21:06:54,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916131379] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:54,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:54,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:06:54,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410922231] [2022-04-06 21:06:54,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:54,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:06:54,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:54,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:06:54,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2615, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:06:54,613 INFO L87 Difference]: Start difference. First operand 1692 states and 1856 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:56,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:56,754 INFO L93 Difference]: Finished difference Result 1710 states and 1877 transitions. [2022-04-06 21:06:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:06:56,754 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-06 21:06:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:56,774 INFO L225 Difference]: With dead ends: 1710 [2022-04-06 21:06:56,774 INFO L226 Difference]: Without dead ends: 1704 [2022-04-06 21:06:56,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=336, Invalid=6636, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:06:56,797 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:56,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 183 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:06:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-04-06 21:06:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1702. [2022-04-06 21:06:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1516 states have (on average 1.1094986807387863) internal successors, (1682), 1634 states have internal predecessors, (1682), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (123), 62 states have call predecessors, (123), 62 states have call successors, (123) [2022-04-06 21:06:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 1869 transitions. [2022-04-06 21:06:57,904 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 1869 transitions. Word has length 65 [2022-04-06 21:06:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:57,904 INFO L478 AbstractCegarLoop]: Abstraction has 1702 states and 1869 transitions. [2022-04-06 21:06:57,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 29 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:06:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 1869 transitions. [2022-04-06 21:06:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 21:06:57,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:57,920 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:57,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:58,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:58,135 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1215970924, now seen corresponding path program 269 times [2022-04-06 21:06:58,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:58,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1268781354] [2022-04-06 21:06:58,136 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:58,136 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1215970924, now seen corresponding path program 270 times [2022-04-06 21:06:58,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:58,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586517230] [2022-04-06 21:06:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:58,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:58,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:58,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:06:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:58,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:06:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:06:58,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:58,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586517230] [2022-04-06 21:06:58,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586517230] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:58,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636824943] [2022-04-06 21:06:58,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:58,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:58,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:58,876 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:58,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 21:06:59,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 21:06:59,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:59,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 21:06:59,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:07:00,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:07:02,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636824943] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:02,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:02,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-04-06 21:07:02,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1268781354] [2022-04-06 21:07:02,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1268781354] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:02,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:02,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:07:02,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777075294] [2022-04-06 21:07:02,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:02,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:07:02,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:07:02,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:07:02,566 INFO L87 Difference]: Start difference. First operand 1702 states and 1869 transitions. Second operand has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 38 states have internal predecessors, (58), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:07,181 INFO L93 Difference]: Finished difference Result 1878 states and 2074 transitions. [2022-04-06 21:07:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:07:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 38 states have internal predecessors, (58), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-04-06 21:07:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:07,231 INFO L225 Difference]: With dead ends: 1878 [2022-04-06 21:07:07,232 INFO L226 Difference]: Without dead ends: 1864 [2022-04-06 21:07:07,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=588, Invalid=18318, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 21:07:07,259 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 357 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 9542 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 9582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 9542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:07,260 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 358 Invalid, 9582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 9542 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 21:07:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-04-06 21:07:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1855. [2022-04-06 21:07:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1651 states have (on average 1.1090248334342823) internal successors, (1831), 1781 states have internal predecessors, (1831), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (141), 68 states have call predecessors, (141), 68 states have call successors, (141) [2022-04-06 21:07:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2042 transitions. [2022-04-06 21:07:08,492 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2042 transitions. Word has length 66 [2022-04-06 21:07:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:08,492 INFO L478 AbstractCegarLoop]: Abstraction has 1855 states and 2042 transitions. [2022-04-06 21:07:08,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 38 states have internal predecessors, (58), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2042 transitions. [2022-04-06 21:07:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 21:07:08,509 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:08,509 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:08,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-04-06 21:07:08,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:08,726 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:08,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2031107919, now seen corresponding path program 271 times [2022-04-06 21:07:08,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:08,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251270135] [2022-04-06 21:07:08,726 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:08,727 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2031107919, now seen corresponding path program 272 times [2022-04-06 21:07:08,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:08,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192119048] [2022-04-06 21:07:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:08,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:08,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:08,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:07:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:08,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:07:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:07:09,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:09,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192119048] [2022-04-06 21:07:09,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192119048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:09,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412366353] [2022-04-06 21:07:09,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:09,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:09,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:09,242 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:07:09,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-06 21:07:09,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:09,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:09,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 21:07:09,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:07:10,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:07:11,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412366353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:11,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:11,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-04-06 21:07:11,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:11,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251270135] [2022-04-06 21:07:11,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251270135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:11,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:11,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:07:11,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121423950] [2022-04-06 21:07:11,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:11,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:07:11,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:11,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:07:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:07:11,849 INFO L87 Difference]: Start difference. First operand 1855 states and 2042 transitions. Second operand has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 38 states have internal predecessors, (58), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:17,243 INFO L93 Difference]: Finished difference Result 1870 states and 2057 transitions. [2022-04-06 21:07:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:07:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 38 states have internal predecessors, (58), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-04-06 21:07:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:17,254 INFO L225 Difference]: With dead ends: 1870 [2022-04-06 21:07:17,254 INFO L226 Difference]: Without dead ends: 1858 [2022-04-06 21:07:17,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=588, Invalid=18318, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 21:07:17,326 INFO L913 BasicCegarLoop]: 178 mSDtfsCounter, 377 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 9613 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 9652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 9613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:17,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 360 Invalid, 9652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 9613 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 21:07:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-04-06 21:07:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1856. [2022-04-06 21:07:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1652 states have (on average 1.1089588377723971) internal successors, (1832), 1782 states have internal predecessors, (1832), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-04-06 21:07:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2036 transitions. [2022-04-06 21:07:18,608 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2036 transitions. Word has length 66 [2022-04-06 21:07:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:18,608 INFO L478 AbstractCegarLoop]: Abstraction has 1856 states and 2036 transitions. [2022-04-06 21:07:18,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 38 states have internal predecessors, (58), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:18,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2036 transitions. [2022-04-06 21:07:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 21:07:18,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:18,629 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:18,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:18,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-04-06 21:07:18,846 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:18,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:18,847 INFO L85 PathProgramCache]: Analyzing trace with hash -745195091, now seen corresponding path program 273 times [2022-04-06 21:07:18,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:18,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [888207776] [2022-04-06 21:07:18,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:18,847 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:18,847 INFO L85 PathProgramCache]: Analyzing trace with hash -745195091, now seen corresponding path program 274 times [2022-04-06 21:07:18,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:18,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641314634] [2022-04-06 21:07:18,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:18,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:18,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:18,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:07:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:18,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:07:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:07:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:18,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641314634] [2022-04-06 21:07:18,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641314634] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:18,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969382507] [2022-04-06 21:07:18,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:18,984 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:07:18,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-06 21:07:19,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:19,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:19,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:07:19,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:07:19,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:07:19,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969382507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:19,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:19,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-04-06 21:07:19,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [888207776] [2022-04-06 21:07:19,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [888207776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:19,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:19,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:07:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555355141] [2022-04-06 21:07:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:19,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:07:19,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:07:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:07:19,446 INFO L87 Difference]: Start difference. First operand 1856 states and 2036 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:07:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:21,692 INFO L93 Difference]: Finished difference Result 2152 states and 2381 transitions. [2022-04-06 21:07:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 21:07:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 66 [2022-04-06 21:07:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:21,705 INFO L225 Difference]: With dead ends: 2152 [2022-04-06 21:07:21,705 INFO L226 Difference]: Without dead ends: 2082 [2022-04-06 21:07:21,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1803, Invalid=5169, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:07:21,789 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 130 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:21,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 87 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:07:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-04-06 21:07:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2034. [2022-04-06 21:07:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1830 states have (on average 1.1076502732240436) internal successors, (2027), 1960 states have internal predecessors, (2027), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-04-06 21:07:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2231 transitions. [2022-04-06 21:07:23,169 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2231 transitions. Word has length 66 [2022-04-06 21:07:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:23,169 INFO L478 AbstractCegarLoop]: Abstraction has 2034 states and 2231 transitions. [2022-04-06 21:07:23,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:07:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2231 transitions. [2022-04-06 21:07:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 21:07:23,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:23,192 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:23,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:23,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-04-06 21:07:23,408 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -582637166, now seen corresponding path program 275 times [2022-04-06 21:07:23,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [332589753] [2022-04-06 21:07:23,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:23,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:23,409 INFO L85 PathProgramCache]: Analyzing trace with hash -582637166, now seen corresponding path program 276 times [2022-04-06 21:07:23,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:23,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008143165] [2022-04-06 21:07:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:23,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:23,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:23,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:07:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:23,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:07:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:07:23,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008143165] [2022-04-06 21:07:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008143165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947489625] [2022-04-06 21:07:23,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:23,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:23,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:23,565 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:07:23,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-04-06 21:07:23,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 21:07:23,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:23,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:07:23,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:07:23,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:07:24,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947489625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:24,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:24,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-04-06 21:07:24,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:24,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [332589753] [2022-04-06 21:07:24,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [332589753] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:24,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:24,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:07:24,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551018994] [2022-04-06 21:07:24,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:24,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:07:24,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:24,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:07:24,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:07:24,028 INFO L87 Difference]: Start difference. First operand 2034 states and 2231 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:26,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:26,290 INFO L93 Difference]: Finished difference Result 3395 states and 3698 transitions. [2022-04-06 21:07:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 21:07:26,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-04-06 21:07:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:26,467 INFO L225 Difference]: With dead ends: 3395 [2022-04-06 21:07:26,467 INFO L226 Difference]: Without dead ends: 2260 [2022-04-06 21:07:26,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1803, Invalid=5169, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:07:26,508 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 136 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:26,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 90 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:07:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-04-06 21:07:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2212. [2022-04-06 21:07:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-04-06 21:07:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2426 transitions. [2022-04-06 21:07:28,031 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2426 transitions. Word has length 66 [2022-04-06 21:07:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:28,031 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2426 transitions. [2022-04-06 21:07:28,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2426 transitions. [2022-04-06 21:07:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:07:28,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:28,058 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:28,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:28,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-04-06 21:07:28,272 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:28,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1815330922, now seen corresponding path program 277 times [2022-04-06 21:07:28,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:28,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [671575661] [2022-04-06 21:07:28,274 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:28,274 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1815330922, now seen corresponding path program 278 times [2022-04-06 21:07:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:28,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699587939] [2022-04-06 21:07:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:28,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:28,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:28,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:07:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:28,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:07:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:07:29,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:29,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699587939] [2022-04-06 21:07:29,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699587939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:29,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898094699] [2022-04-06 21:07:29,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:29,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:29,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:29,138 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:07:29,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-04-06 21:07:29,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:29,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:29,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 21:07:29,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:07:29,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:07:30,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898094699] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:30,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:30,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 55 [2022-04-06 21:07:30,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:30,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [671575661] [2022-04-06 21:07:30,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [671575661] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:30,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:30,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 21:07:30,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172198106] [2022-04-06 21:07:30,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:30,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 21:07:30,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:30,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 21:07:30,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2853, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:07:30,026 INFO L87 Difference]: Start difference. First operand 2212 states and 2426 transitions. Second operand has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 45 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:35,217 INFO L93 Difference]: Finished difference Result 2412 states and 2647 transitions. [2022-04-06 21:07:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 21:07:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 45 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:07:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:35,244 INFO L225 Difference]: With dead ends: 2412 [2022-04-06 21:07:35,244 INFO L226 Difference]: Without dead ends: 2406 [2022-04-06 21:07:35,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=334, Invalid=9968, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 21:07:35,295 INFO L913 BasicCegarLoop]: 181 mSDtfsCounter, 399 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 12820 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 12890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 12820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:35,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 413 Invalid, 12890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 12820 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 21:07:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2022-04-06 21:07:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2228. [2022-04-06 21:07:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2021 states have (on average 1.106877783275606) internal successors, (2237), 2153 states have internal predecessors, (2237), 71 states have call successors, (71), 5 states have call predecessors, (71), 135 states have return successors, (137), 69 states have call predecessors, (137), 69 states have call successors, (137) [2022-04-06 21:07:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2445 transitions. [2022-04-06 21:07:36,789 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2445 transitions. Word has length 67 [2022-04-06 21:07:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:36,789 INFO L478 AbstractCegarLoop]: Abstraction has 2228 states and 2445 transitions. [2022-04-06 21:07:36,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 45 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2445 transitions. [2022-04-06 21:07:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:07:36,813 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:36,814 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:36,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:37,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-04-06 21:07:37,019 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1329996490, now seen corresponding path program 279 times [2022-04-06 21:07:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:37,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082347972] [2022-04-06 21:07:37,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:37,020 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1329996490, now seen corresponding path program 280 times [2022-04-06 21:07:37,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:37,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460772311] [2022-04-06 21:07:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:37,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:37,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:37,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:07:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:37,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:07:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:07:37,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:37,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460772311] [2022-04-06 21:07:37,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460772311] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:37,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025834501] [2022-04-06 21:07:37,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:37,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:37,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:37,684 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:07:37,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-04-06 21:07:37,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:37,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 21:07:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:07:38,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:07:38,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025834501] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:38,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:38,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 55 [2022-04-06 21:07:38,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082347972] [2022-04-06 21:07:38,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082347972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:38,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:38,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 21:07:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365756203] [2022-04-06 21:07:38,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:38,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 21:07:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 21:07:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2849, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:07:38,454 INFO L87 Difference]: Start difference. First operand 2228 states and 2445 transitions. Second operand has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:43,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:43,037 INFO L93 Difference]: Finished difference Result 2234 states and 2450 transitions. [2022-04-06 21:07:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:07:43,038 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:07:43,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:43,051 INFO L225 Difference]: With dead ends: 2234 [2022-04-06 21:07:43,051 INFO L226 Difference]: Without dead ends: 2212 [2022-04-06 21:07:43,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=336, Invalid=9564, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 21:07:43,083 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 314 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 10952 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 11003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 10952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:43,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 383 Invalid, 11003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 10952 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 21:07:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-04-06 21:07:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2212. [2022-04-06 21:07:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-04-06 21:07:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2427 transitions. [2022-04-06 21:07:44,582 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2427 transitions. Word has length 67 [2022-04-06 21:07:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:44,582 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2427 transitions. [2022-04-06 21:07:44,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2427 transitions. [2022-04-06 21:07:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:07:44,606 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:44,606 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:44,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-04-06 21:07:44,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:44,822 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1769464598, now seen corresponding path program 281 times [2022-04-06 21:07:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:44,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1855688185] [2022-04-06 21:07:44,823 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:44,823 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1769464598, now seen corresponding path program 282 times [2022-04-06 21:07:44,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:44,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638744425] [2022-04-06 21:07:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:44,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:44,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:44,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:07:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:45,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:07:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:07:45,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:45,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638744425] [2022-04-06 21:07:45,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638744425] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:45,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919913785] [2022-04-06 21:07:45,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:45,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:45,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:45,391 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:07:45,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-04-06 21:07:45,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:07:45,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:45,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 21:07:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:07:45,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:07:46,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919913785] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:46,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 55 [2022-04-06 21:07:46,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1855688185] [2022-04-06 21:07:46,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1855688185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:46,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:07:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676138174] [2022-04-06 21:07:46,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:46,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:07:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:07:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2845, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:07:46,152 INFO L87 Difference]: Start difference. First operand 2212 states and 2427 transitions. Second operand has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:50,955 INFO L93 Difference]: Finished difference Result 2218 states and 2432 transitions. [2022-04-06 21:07:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:07:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:07:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:50,968 INFO L225 Difference]: With dead ends: 2218 [2022-04-06 21:07:50,969 INFO L226 Difference]: Without dead ends: 2194 [2022-04-06 21:07:51,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=338, Invalid=9168, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 21:07:51,019 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 275 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 9204 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 9254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 9204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:51,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 353 Invalid, 9254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 9204 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 21:07:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2022-04-06 21:07:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2022-04-06 21:07:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1993 states have (on average 1.1063723030607124) internal successors, (2205), 2121 states have internal predecessors, (2205), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (133), 67 states have call predecessors, (133), 67 states have call successors, (133) [2022-04-06 21:07:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2407 transitions. [2022-04-06 21:07:52,546 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2407 transitions. Word has length 67 [2022-04-06 21:07:52,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:52,546 INFO L478 AbstractCegarLoop]: Abstraction has 2194 states and 2407 transitions. [2022-04-06 21:07:52,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2407 transitions. [2022-04-06 21:07:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:07:52,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:52,572 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:52,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-04-06 21:07:52,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:52,787 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:52,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1039746634, now seen corresponding path program 283 times [2022-04-06 21:07:52,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:52,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [174963258] [2022-04-06 21:07:52,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:52,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:52,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1039746634, now seen corresponding path program 284 times [2022-04-06 21:07:52,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:52,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817829227] [2022-04-06 21:07:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:52,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:52,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:52,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:07:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:53,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:07:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:07:53,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817829227] [2022-04-06 21:07:53,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817829227] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136442917] [2022-04-06 21:07:53,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:53,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:53,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:53,462 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:07:53,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-04-06 21:07:53,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:53,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:53,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:07:53,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:07:54,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:07:54,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136442917] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:54,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:54,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 55 [2022-04-06 21:07:54,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:54,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [174963258] [2022-04-06 21:07:54,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [174963258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:54,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:54,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:07:54,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352183784] [2022-04-06 21:07:54,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:54,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:07:54,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:07:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2841, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:07:54,602 INFO L87 Difference]: Start difference. First operand 2194 states and 2407 transitions. Second operand has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:07:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:58,797 INFO L93 Difference]: Finished difference Result 2200 states and 2412 transitions. [2022-04-06 21:07:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:07:58,798 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:07:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:58,809 INFO L225 Difference]: With dead ends: 2200 [2022-04-06 21:07:58,809 INFO L226 Difference]: Without dead ends: 2174 [2022-04-06 21:07:58,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=340, Invalid=8780, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 21:07:58,840 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 236 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7576 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 7624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 7576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:58,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 323 Invalid, 7624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 7576 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 21:07:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-04-06 21:08:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2174. [2022-04-06 21:08:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1976 states have (on average 1.1062753036437247) internal successors, (2186), 2102 states have internal predecessors, (2186), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (131), 66 states have call predecessors, (131), 66 states have call successors, (131) [2022-04-06 21:08:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 2385 transitions. [2022-04-06 21:08:00,309 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 2385 transitions. Word has length 67 [2022-04-06 21:08:00,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:00,310 INFO L478 AbstractCegarLoop]: Abstraction has 2174 states and 2385 transitions. [2022-04-06 21:08:00,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:00,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 2385 transitions. [2022-04-06 21:08:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:08:00,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:00,331 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:00,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-04-06 21:08:00,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:00,547 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:00,548 INFO L85 PathProgramCache]: Analyzing trace with hash -125863574, now seen corresponding path program 285 times [2022-04-06 21:08:00,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:00,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [525816430] [2022-04-06 21:08:00,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:00,549 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash -125863574, now seen corresponding path program 286 times [2022-04-06 21:08:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:00,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240604482] [2022-04-06 21:08:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:00,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:00,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:00,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:08:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:00,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:08:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:08:01,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240604482] [2022-04-06 21:08:01,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240604482] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674829584] [2022-04-06 21:08:01,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:08:01,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:01,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:01,231 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:08:01,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-04-06 21:08:01,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:08:01,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:08:01,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:08:01,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:08:02,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674829584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:02,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:02,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 55 [2022-04-06 21:08:02,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:02,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [525816430] [2022-04-06 21:08:02,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [525816430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:02,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:02,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:08:02,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104667633] [2022-04-06 21:08:02,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:02,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:08:02,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:02,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:08:02,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:08:02,061 INFO L87 Difference]: Start difference. First operand 2174 states and 2385 transitions. Second operand has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:05,427 INFO L93 Difference]: Finished difference Result 2180 states and 2390 transitions. [2022-04-06 21:08:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:08:05,427 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:08:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:05,439 INFO L225 Difference]: With dead ends: 2180 [2022-04-06 21:08:05,440 INFO L226 Difference]: Without dead ends: 2152 [2022-04-06 21:08:05,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=342, Invalid=8400, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 21:08:05,471 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6068 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 6114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:05,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 293 Invalid, 6114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6068 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:08:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-04-06 21:08:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 2152. [2022-04-06 21:08:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1957 states have (on average 1.1062851303014818) internal successors, (2165), 2081 states have internal predecessors, (2165), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (129), 65 states have call predecessors, (129), 65 states have call successors, (129) [2022-04-06 21:08:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2361 transitions. [2022-04-06 21:08:06,981 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2361 transitions. Word has length 67 [2022-04-06 21:08:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:06,981 INFO L478 AbstractCegarLoop]: Abstraction has 2152 states and 2361 transitions. [2022-04-06 21:08:06,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2361 transitions. [2022-04-06 21:08:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:08:07,005 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:07,005 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:07,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:07,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:07,219 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash 933587402, now seen corresponding path program 287 times [2022-04-06 21:08:07,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:07,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [532278686] [2022-04-06 21:08:07,220 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:07,220 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash 933587402, now seen corresponding path program 288 times [2022-04-06 21:08:07,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:07,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170863302] [2022-04-06 21:08:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:07,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:07,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:07,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:08:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:07,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:08:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:08:07,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:07,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170863302] [2022-04-06 21:08:07,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170863302] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:07,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179412088] [2022-04-06 21:08:07,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:08:07,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:07,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:07,871 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:08:07,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-04-06 21:08:08,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:08:08,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:08:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:08:08,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:08:08,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179412088] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:08,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:08,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 55 [2022-04-06 21:08:08,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [532278686] [2022-04-06 21:08:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [532278686] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:08,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:08,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:08:08,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467920916] [2022-04-06 21:08:08,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:08,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:08:08,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:08,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:08:08,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2833, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:08:08,735 INFO L87 Difference]: Start difference. First operand 2152 states and 2361 transitions. Second operand has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:11,951 INFO L93 Difference]: Finished difference Result 2158 states and 2366 transitions. [2022-04-06 21:08:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:08:11,951 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:08:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:11,963 INFO L225 Difference]: With dead ends: 2158 [2022-04-06 21:08:11,963 INFO L226 Difference]: Without dead ends: 2128 [2022-04-06 21:08:11,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=344, Invalid=8028, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 21:08:11,994 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 4724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:11,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 263 Invalid, 4724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 21:08:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-04-06 21:08:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2128. [2022-04-06 21:08:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1936 states have (on average 1.1064049586776858) internal successors, (2142), 2058 states have internal predecessors, (2142), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (127), 64 states have call predecessors, (127), 64 states have call successors, (127) [2022-04-06 21:08:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 2335 transitions. [2022-04-06 21:08:13,464 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 2335 transitions. Word has length 67 [2022-04-06 21:08:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:13,465 INFO L478 AbstractCegarLoop]: Abstraction has 2128 states and 2335 transitions. [2022-04-06 21:08:13,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 2335 transitions. [2022-04-06 21:08:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:08:13,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:13,504 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:13,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:13,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:13,722 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1461594646, now seen corresponding path program 289 times [2022-04-06 21:08:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:13,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [155327176] [2022-04-06 21:08:13,723 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:13,723 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1461594646, now seen corresponding path program 290 times [2022-04-06 21:08:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384945569] [2022-04-06 21:08:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:13,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:13,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:08:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:13,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:08:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:08:14,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384945569] [2022-04-06 21:08:14,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384945569] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544285908] [2022-04-06 21:08:14,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:08:14,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:14,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:14,242 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:08:14,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-04-06 21:08:14,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:08:14,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:08:14,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:08:15,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:08:15,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544285908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:15,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:15,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 55 [2022-04-06 21:08:15,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:15,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [155327176] [2022-04-06 21:08:15,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [155327176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:15,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:15,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:08:15,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337165838] [2022-04-06 21:08:15,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:15,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:08:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:08:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2829, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:08:15,502 INFO L87 Difference]: Start difference. First operand 2128 states and 2335 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:18,493 INFO L93 Difference]: Finished difference Result 2134 states and 2340 transitions. [2022-04-06 21:08:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:08:18,493 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:08:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:18,505 INFO L225 Difference]: With dead ends: 2134 [2022-04-06 21:08:18,505 INFO L226 Difference]: Without dead ends: 2102 [2022-04-06 21:08:18,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=7664, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:08:18,536 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 120 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3315 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:18,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 230 Invalid, 3359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3315 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:08:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-04-06 21:08:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 2102. [2022-04-06 21:08:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1913 states have (on average 1.1066387872451646) internal successors, (2117), 2033 states have internal predecessors, (2117), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (125), 63 states have call predecessors, (125), 63 states have call successors, (125) [2022-04-06 21:08:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2307 transitions. [2022-04-06 21:08:20,117 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2307 transitions. Word has length 67 [2022-04-06 21:08:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:20,117 INFO L478 AbstractCegarLoop]: Abstraction has 2102 states and 2307 transitions. [2022-04-06 21:08:20,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2307 transitions. [2022-04-06 21:08:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:08:20,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:20,140 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:20,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:20,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:20,351 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 528374587, now seen corresponding path program 291 times [2022-04-06 21:08:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:20,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1962677630] [2022-04-06 21:08:20,352 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:20,352 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 528374587, now seen corresponding path program 292 times [2022-04-06 21:08:20,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:20,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202919905] [2022-04-06 21:08:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:20,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:20,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:20,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:08:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:20,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 21:08:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 21:08:20,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:20,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202919905] [2022-04-06 21:08:20,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202919905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:20,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734379005] [2022-04-06 21:08:20,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:08:20,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:20,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:20,743 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:08:20,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-04-06 21:08:20,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:08:20,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:20,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:08:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 21:08:21,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 21:08:22,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734379005] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:22,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:22,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-04-06 21:08:22,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:22,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1962677630] [2022-04-06 21:08:22,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1962677630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:22,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:22,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:08:22,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067024531] [2022-04-06 21:08:22,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:22,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:08:22,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:22,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:08:22,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 21:08:22,358 INFO L87 Difference]: Start difference. First operand 2102 states and 2307 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:25,517 INFO L93 Difference]: Finished difference Result 2238 states and 2473 transitions. [2022-04-06 21:08:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 21:08:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:08:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:25,728 INFO L225 Difference]: With dead ends: 2238 [2022-04-06 21:08:25,728 INFO L226 Difference]: Without dead ends: 2217 [2022-04-06 21:08:25,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=389, Invalid=6751, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 21:08:25,798 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 264 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4189 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 4217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:25,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 238 Invalid, 4217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4189 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 21:08:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2022-04-06 21:08:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2212. [2022-04-06 21:08:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1978 states have (on average 1.10262891809909) internal successors, (2181), 2128 states have internal predecessors, (2181), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-04-06 21:08:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2431 transitions. [2022-04-06 21:08:27,479 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2431 transitions. Word has length 67 [2022-04-06 21:08:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:27,480 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2431 transitions. [2022-04-06 21:08:27,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2431 transitions. [2022-04-06 21:08:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:08:27,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:27,515 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:27,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:27,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-04-06 21:08:27,731 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:27,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1568836938, now seen corresponding path program 293 times [2022-04-06 21:08:27,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:27,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1158907319] [2022-04-06 21:08:27,732 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:27,732 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:27,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1568836938, now seen corresponding path program 294 times [2022-04-06 21:08:27,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:27,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901339018] [2022-04-06 21:08:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:27,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:27,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:08:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:08:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:08:28,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:28,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901339018] [2022-04-06 21:08:28,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901339018] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:28,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56239565] [2022-04-06 21:08:28,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:08:28,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:28,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:28,288 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:08:28,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-04-06 21:08:28,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:08:28,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:08:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:08:29,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:08:29,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56239565] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:29,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:29,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 55 [2022-04-06 21:08:29,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:29,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1158907319] [2022-04-06 21:08:29,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1158907319] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:29,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:29,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:08:29,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367919443] [2022-04-06 21:08:29,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:29,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:08:29,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:29,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:08:29,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2825, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:08:29,515 INFO L87 Difference]: Start difference. First operand 2212 states and 2431 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:32,208 INFO L93 Difference]: Finished difference Result 2230 states and 2453 transitions. [2022-04-06 21:08:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:08:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:08:32,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:32,235 INFO L225 Difference]: With dead ends: 2230 [2022-04-06 21:08:32,235 INFO L226 Difference]: Without dead ends: 2209 [2022-04-06 21:08:32,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=348, Invalid=7308, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 21:08:32,272 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:32,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 203 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:08:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-04-06 21:08:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2204. [2022-04-06 21:08:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 1970 states have (on average 1.1035532994923858) internal successors, (2174), 2120 states have internal predecessors, (2174), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-04-06 21:08:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2424 transitions. [2022-04-06 21:08:33,806 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2424 transitions. Word has length 67 [2022-04-06 21:08:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:33,806 INFO L478 AbstractCegarLoop]: Abstraction has 2204 states and 2424 transitions. [2022-04-06 21:08:33,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2424 transitions. [2022-04-06 21:08:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:08:33,831 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:33,831 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:33,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:34,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-04-06 21:08:34,047 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1013254207, now seen corresponding path program 295 times [2022-04-06 21:08:34,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1447602808] [2022-04-06 21:08:34,048 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:34,048 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1013254207, now seen corresponding path program 296 times [2022-04-06 21:08:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436123079] [2022-04-06 21:08:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:34,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:34,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:34,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:08:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:34,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:08:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 21:08:34,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:34,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436123079] [2022-04-06 21:08:34,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436123079] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:34,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436876304] [2022-04-06 21:08:34,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:08:34,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:34,572 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:08:34,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-04-06 21:08:34,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:08:34,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:08:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 21:08:35,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 21:08:36,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436876304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:36,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:36,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-04-06 21:08:36,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1447602808] [2022-04-06 21:08:36,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1447602808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:36,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:36,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:08:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934572098] [2022-04-06 21:08:36,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:36,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:08:36,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:08:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 21:08:36,234 INFO L87 Difference]: Start difference. First operand 2204 states and 2424 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:39,639 INFO L93 Difference]: Finished difference Result 2218 states and 2437 transitions. [2022-04-06 21:08:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 21:08:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 21:08:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:39,655 INFO L225 Difference]: With dead ends: 2218 [2022-04-06 21:08:39,655 INFO L226 Difference]: Without dead ends: 2186 [2022-04-06 21:08:39,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=389, Invalid=6751, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 21:08:39,692 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 264 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 4081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:39,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 232 Invalid, 4081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:08:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-04-06 21:08:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2022-04-06 21:08:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 1950 states have (on average 1.1035897435897435) internal successors, (2152), 2100 states have internal predecessors, (2152), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (156), 78 states have call predecessors, (156), 78 states have call successors, (156) [2022-04-06 21:08:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 2388 transitions. [2022-04-06 21:08:41,235 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 2388 transitions. Word has length 67 [2022-04-06 21:08:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:41,235 INFO L478 AbstractCegarLoop]: Abstraction has 2184 states and 2388 transitions. [2022-04-06 21:08:41,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 2388 transitions. [2022-04-06 21:08:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:08:41,260 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:41,260 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:41,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:41,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-04-06 21:08:41,476 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:41,476 INFO L85 PathProgramCache]: Analyzing trace with hash -578788689, now seen corresponding path program 297 times [2022-04-06 21:08:41,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:41,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1837022403] [2022-04-06 21:08:41,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:41,477 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash -578788689, now seen corresponding path program 298 times [2022-04-06 21:08:41,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:41,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495890291] [2022-04-06 21:08:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:41,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:41,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:41,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:08:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:41,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:08:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:08:42,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495890291] [2022-04-06 21:08:42,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495890291] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331776337] [2022-04-06 21:08:42,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:08:42,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:42,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:42,299 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:08:42,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-04-06 21:08:42,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:08:42,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 21:08:42,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:08:44,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:08:46,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331776337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:46,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:46,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-04-06 21:08:46,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1837022403] [2022-04-06 21:08:46,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1837022403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:46,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:46,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:08:46,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046536568] [2022-04-06 21:08:46,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:46,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:08:46,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:08:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 21:08:46,016 INFO L87 Difference]: Start difference. First operand 2184 states and 2388 transitions. Second operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 40 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:51,419 INFO L93 Difference]: Finished difference Result 2390 states and 2627 transitions. [2022-04-06 21:08:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:08:51,420 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 40 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-04-06 21:08:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:51,534 INFO L225 Difference]: With dead ends: 2390 [2022-04-06 21:08:51,534 INFO L226 Difference]: Without dead ends: 2376 [2022-04-06 21:08:51,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=623, Invalid=20547, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 21:08:51,578 INFO L913 BasicCegarLoop]: 186 mSDtfsCounter, 379 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 10403 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 10445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 10403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:51,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 373 Invalid, 10445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 10403 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 21:08:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-04-06 21:08:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2367. [2022-04-06 21:08:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2112 states have (on average 1.103219696969697) internal successors, (2330), 2276 states have internal predecessors, (2330), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (177), 85 states have call predecessors, (177), 85 states have call successors, (177) [2022-04-06 21:08:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2594 transitions. [2022-04-06 21:08:53,420 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2594 transitions. Word has length 68 [2022-04-06 21:08:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:53,420 INFO L478 AbstractCegarLoop]: Abstraction has 2367 states and 2594 transitions. [2022-04-06 21:08:53,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 40 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:08:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2594 transitions. [2022-04-06 21:08:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:08:53,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:53,446 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:53,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:53,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-04-06 21:08:53,662 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:53,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:53,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1079345620, now seen corresponding path program 299 times [2022-04-06 21:08:53,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:53,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501992880] [2022-04-06 21:08:53,663 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:53,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:53,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1079345620, now seen corresponding path program 300 times [2022-04-06 21:08:53,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:53,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311677488] [2022-04-06 21:08:53,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:53,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:53,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:53,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:08:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:53,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:08:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:08:54,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:54,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311677488] [2022-04-06 21:08:54,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311677488] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:54,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97184075] [2022-04-06 21:08:54,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:08:54,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:54,212 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:08:54,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-04-06 21:08:54,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 21:08:54,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 21:08:54,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:08:55,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:08:57,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97184075] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:57,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:57,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-04-06 21:08:57,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:57,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501992880] [2022-04-06 21:08:57,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501992880] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:57,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:57,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:08:57,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435670833] [2022-04-06 21:08:57,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:57,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:08:57,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:08:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 21:08:57,726 INFO L87 Difference]: Start difference. First operand 2367 states and 2594 transitions. Second operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 40 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:03,570 INFO L93 Difference]: Finished difference Result 2382 states and 2609 transitions. [2022-04-06 21:09:03,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:09:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 40 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-04-06 21:09:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:03,586 INFO L225 Difference]: With dead ends: 2382 [2022-04-06 21:09:03,586 INFO L226 Difference]: Without dead ends: 2370 [2022-04-06 21:09:03,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=623, Invalid=20547, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 21:09:03,633 INFO L913 BasicCegarLoop]: 188 mSDtfsCounter, 401 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 10755 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 10796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 10755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:03,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 380 Invalid, 10796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 10755 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 21:09:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-04-06 21:09:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2368. [2022-04-06 21:09:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2113 states have (on average 1.1031708471367723) internal successors, (2331), 2277 states have internal predecessors, (2331), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (169), 85 states have call predecessors, (169), 85 states have call successors, (169) [2022-04-06 21:09:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2587 transitions. [2022-04-06 21:09:05,454 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2587 transitions. Word has length 68 [2022-04-06 21:09:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:05,454 INFO L478 AbstractCegarLoop]: Abstraction has 2368 states and 2587 transitions. [2022-04-06 21:09:05,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 40 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2587 transitions. [2022-04-06 21:09:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:09:05,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:05,485 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:05,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-04-06 21:09:05,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:05,688 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1538600402, now seen corresponding path program 301 times [2022-04-06 21:09:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:05,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [668069951] [2022-04-06 21:09:05,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:05,689 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:05,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1538600402, now seen corresponding path program 302 times [2022-04-06 21:09:05,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:05,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488791504] [2022-04-06 21:09:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:05,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:05,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:05,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:09:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:05,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 21:09:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:09:05,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:05,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488791504] [2022-04-06 21:09:05,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488791504] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:05,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955048713] [2022-04-06 21:09:05,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:09:05,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:05,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:05,824 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:09:05,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-04-06 21:09:06,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:09:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 21:09:06,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:09:06,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:09:06,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955048713] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:06,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:06,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 31 [2022-04-06 21:09:06,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [668069951] [2022-04-06 21:09:06,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [668069951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:06,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:06,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:09:06,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891828466] [2022-04-06 21:09:06,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:06,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:09:06,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:06,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:09:06,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:09:06,314 INFO L87 Difference]: Start difference. First operand 2368 states and 2587 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:08,822 INFO L93 Difference]: Finished difference Result 3558 states and 3832 transitions. [2022-04-06 21:09:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 21:09:08,822 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-04-06 21:09:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:09,034 INFO L225 Difference]: With dead ends: 3558 [2022-04-06 21:09:09,034 INFO L226 Difference]: Without dead ends: 2373 [2022-04-06 21:09:09,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2181, Invalid=5129, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 21:09:09,086 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 137 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:09,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 96 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:09:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-04-06 21:09:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2365. [2022-04-06 21:09:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2116 states have (on average 1.1011342155009451) internal successors, (2330), 2276 states have internal predecessors, (2330), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (163), 83 states have call predecessors, (163), 83 states have call successors, (163) [2022-04-06 21:09:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 2578 transitions. [2022-04-06 21:09:10,892 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 2578 transitions. Word has length 68 [2022-04-06 21:09:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:10,892 INFO L478 AbstractCegarLoop]: Abstraction has 2365 states and 2578 transitions. [2022-04-06 21:09:10,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 2578 transitions. [2022-04-06 21:09:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:09:10,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:10,919 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:10,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-04-06 21:09:11,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-04-06 21:09:11,135 INFO L403 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash 504471117, now seen corresponding path program 303 times [2022-04-06 21:09:11,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:11,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517082004] [2022-04-06 21:09:11,136 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:11,136 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 504471117, now seen corresponding path program 304 times [2022-04-06 21:09:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:11,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623763611] [2022-04-06 21:09:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:11,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:11,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:11,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:09:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:11,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:09:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:09:11,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:11,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623763611] [2022-04-06 21:09:11,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623763611] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:11,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677044943] [2022-04-06 21:09:11,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:09:11,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:11,299 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:09:11,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-04-06 21:09:11,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:09:11,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:11,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 21:09:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:09:11,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:09:11,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677044943] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:11,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:11,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 31 [2022-04-06 21:09:11,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:11,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517082004] [2022-04-06 21:09:11,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517082004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:11,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:11,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:09:11,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766237542] [2022-04-06 21:09:11,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:11,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:09:11,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:11,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:09:11,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:09:11,760 INFO L87 Difference]: Start difference. First operand 2365 states and 2578 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:09:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:14,305 INFO L93 Difference]: Finished difference Result 2439 states and 2668 transitions. [2022-04-06 21:09:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 21:09:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-04-06 21:09:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:14,320 INFO L225 Difference]: With dead ends: 2439 [2022-04-06 21:09:14,320 INFO L226 Difference]: Without dead ends: 2382 [2022-04-06 21:09:14,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2181, Invalid=5129, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 21:09:14,386 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 177 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:14,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 80 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:09:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-04-06 21:09:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2382. [2022-04-06 21:09:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2133 states have (on average 1.1003281762775434) internal successors, (2347), 2293 states have internal predecessors, (2347), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (163), 83 states have call predecessors, (163), 83 states have call successors, (163) [2022-04-06 21:09:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 2595 transitions. [2022-04-06 21:09:16,110 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 2595 transitions. Word has length 68 [2022-04-06 21:09:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:16,110 INFO L478 AbstractCegarLoop]: Abstraction has 2382 states and 2595 transitions. [2022-04-06 21:09:16,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:09:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 2595 transitions. [2022-04-06 21:09:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:09:16,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:16,135 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:16,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-04-06 21:09:16,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:16,351 INFO L403 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:16,351 INFO L85 PathProgramCache]: Analyzing trace with hash -119448275, now seen corresponding path program 305 times [2022-04-06 21:09:16,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:16,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1242088650] [2022-04-06 21:09:16,352 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:16,352 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash -119448275, now seen corresponding path program 306 times [2022-04-06 21:09:16,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:16,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482630671] [2022-04-06 21:09:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:16,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:16,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:16,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:09:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:16,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:09:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:09:17,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482630671] [2022-04-06 21:09:17,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482630671] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504990783] [2022-04-06 21:09:17,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:09:17,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:17,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:17,197 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:09:17,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-04-06 21:09:17,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 21:09:17,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:17,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 21:09:17,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:09:17,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:09:18,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504990783] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:18,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:18,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 57 [2022-04-06 21:09:18,075 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:18,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1242088650] [2022-04-06 21:09:18,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1242088650] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:18,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:18,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 21:09:18,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760230581] [2022-04-06 21:09:18,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:18,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 21:09:18,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:18,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 21:09:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3071, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:09:18,076 INFO L87 Difference]: Start difference. First operand 2382 states and 2595 transitions. Second operand has 51 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 47 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:24,058 INFO L93 Difference]: Finished difference Result 2590 states and 2824 transitions. [2022-04-06 21:09:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 21:09:24,059 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 47 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-06 21:09:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:24,093 INFO L225 Difference]: With dead ends: 2590 [2022-04-06 21:09:24,094 INFO L226 Difference]: Without dead ends: 2584 [2022-04-06 21:09:24,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=346, Invalid=10784, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 21:09:24,168 INFO L913 BasicCegarLoop]: 189 mSDtfsCounter, 420 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 14048 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 14122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 14048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:24,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 431 Invalid, 14122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 14048 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 21:09:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-04-06 21:09:26,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2398. [2022-04-06 21:09:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2146 states have (on average 1.1006523765144456) internal successors, (2362), 2308 states have internal predecessors, (2362), 86 states have call successors, (86), 5 states have call predecessors, (86), 165 states have return successors, (166), 84 states have call predecessors, (166), 84 states have call successors, (166) [2022-04-06 21:09:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 2614 transitions. [2022-04-06 21:09:26,043 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 2614 transitions. Word has length 69 [2022-04-06 21:09:26,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:26,043 INFO L478 AbstractCegarLoop]: Abstraction has 2398 states and 2614 transitions. [2022-04-06 21:09:26,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 47 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 2614 transitions. [2022-04-06 21:09:26,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:09:26,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:26,071 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:26,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:26,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:26,287 INFO L403 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:26,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:26,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1262505363, now seen corresponding path program 307 times [2022-04-06 21:09:26,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:26,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1972701383] [2022-04-06 21:09:26,288 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:26,288 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1262505363, now seen corresponding path program 308 times [2022-04-06 21:09:26,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:26,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159108629] [2022-04-06 21:09:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:26,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:26,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:26,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:09:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:26,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:09:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:09:27,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159108629] [2022-04-06 21:09:27,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159108629] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826562049] [2022-04-06 21:09:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:09:27,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:27,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:27,082 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:09:27,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-04-06 21:09:27,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:09:27,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:27,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 21:09:27,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:09:27,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:09:27,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826562049] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:27,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:27,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 57 [2022-04-06 21:09:27,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1972701383] [2022-04-06 21:09:27,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1972701383] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:27,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:27,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 21:09:27,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135381891] [2022-04-06 21:09:27,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:27,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 21:09:27,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:27,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 21:09:27,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3067, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:09:27,879 INFO L87 Difference]: Start difference. First operand 2398 states and 2614 transitions. Second operand has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 45 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:32,699 INFO L93 Difference]: Finished difference Result 2404 states and 2619 transitions. [2022-04-06 21:09:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 21:09:32,699 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 45 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-06 21:09:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:32,715 INFO L225 Difference]: With dead ends: 2404 [2022-04-06 21:09:32,715 INFO L226 Difference]: Without dead ends: 2382 [2022-04-06 21:09:32,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 126 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=348, Invalid=10364, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 21:09:32,785 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 329 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 12364 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 12415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 12364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:32,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 406 Invalid, 12415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 12364 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 21:09:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-04-06 21:09:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2382. [2022-04-06 21:09:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2133 states have (on average 1.1003281762775434) internal successors, (2347), 2293 states have internal predecessors, (2347), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (164), 83 states have call predecessors, (164), 83 states have call successors, (164) [2022-04-06 21:09:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 2596 transitions. [2022-04-06 21:09:34,750 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 2596 transitions. Word has length 69 [2022-04-06 21:09:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:34,750 INFO L478 AbstractCegarLoop]: Abstraction has 2382 states and 2596 transitions. [2022-04-06 21:09:34,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 45 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 2596 transitions. [2022-04-06 21:09:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:09:34,778 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:34,779 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:34,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:34,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:34,991 INFO L403 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:34,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:34,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1781210413, now seen corresponding path program 309 times [2022-04-06 21:09:34,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:34,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900112616] [2022-04-06 21:09:34,992 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:34,992 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1781210413, now seen corresponding path program 310 times [2022-04-06 21:09:34,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:34,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780745551] [2022-04-06 21:09:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:34,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:35,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:35,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:09:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:35,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:09:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:09:35,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:35,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780745551] [2022-04-06 21:09:35,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780745551] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:35,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628628289] [2022-04-06 21:09:35,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:09:35,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:35,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:35,739 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:09:35,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-04-06 21:09:35,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:09:35,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 21:09:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:09:36,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:09:36,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628628289] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:36,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:36,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 57 [2022-04-06 21:09:36,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:36,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900112616] [2022-04-06 21:09:36,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900112616] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:36,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:36,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 21:09:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771678498] [2022-04-06 21:09:36,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:36,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 21:09:36,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:36,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 21:09:36,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3063, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:09:36,810 INFO L87 Difference]: Start difference. First operand 2382 states and 2596 transitions. Second operand has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:42,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:42,088 INFO L93 Difference]: Finished difference Result 2388 states and 2601 transitions. [2022-04-06 21:09:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:09:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-06 21:09:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:42,104 INFO L225 Difference]: With dead ends: 2388 [2022-04-06 21:09:42,105 INFO L226 Difference]: Without dead ends: 2364 [2022-04-06 21:09:42,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=350, Invalid=9952, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 21:09:42,150 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 290 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 10516 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 10566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 10516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:42,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 376 Invalid, 10566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 10516 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 21:09:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2022-04-06 21:09:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2022-04-06 21:09:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2118 states have (on average 1.1000944287063268) internal successors, (2330), 2276 states have internal predecessors, (2330), 84 states have call successors, (84), 5 states have call predecessors, (84), 161 states have return successors, (162), 82 states have call predecessors, (162), 82 states have call successors, (162) [2022-04-06 21:09:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 2576 transitions. [2022-04-06 21:09:44,158 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 2576 transitions. Word has length 69 [2022-04-06 21:09:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:44,158 INFO L478 AbstractCegarLoop]: Abstraction has 2364 states and 2576 transitions. [2022-04-06 21:09:44,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 2576 transitions. [2022-04-06 21:09:44,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:09:44,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:44,189 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:44,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:44,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:44,405 INFO L403 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1268059539, now seen corresponding path program 311 times [2022-04-06 21:09:44,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:44,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [789640903] [2022-04-06 21:09:44,406 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:44,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:44,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1268059539, now seen corresponding path program 312 times [2022-04-06 21:09:44,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:44,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311914103] [2022-04-06 21:09:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:44,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:44,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:44,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:09:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:44,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:09:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:09:45,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311914103] [2022-04-06 21:09:45,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311914103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306602277] [2022-04-06 21:09:45,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:09:45,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:45,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:45,290 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:09:45,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-04-06 21:09:45,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:09:45,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:45,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 21:09:45,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:09:46,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:09:46,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306602277] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:46,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:46,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 57 [2022-04-06 21:09:46,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:46,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [789640903] [2022-04-06 21:09:46,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [789640903] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:46,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:46,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:09:46,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146708551] [2022-04-06 21:09:46,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:46,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:09:46,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:46,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:09:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=3059, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:09:46,547 INFO L87 Difference]: Start difference. First operand 2364 states and 2576 transitions. Second operand has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:51,544 INFO L93 Difference]: Finished difference Result 2370 states and 2581 transitions. [2022-04-06 21:09:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:09:51,544 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-06 21:09:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:51,559 INFO L225 Difference]: With dead ends: 2370 [2022-04-06 21:09:51,559 INFO L226 Difference]: Without dead ends: 2344 [2022-04-06 21:09:51,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=352, Invalid=9548, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 21:09:51,601 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 251 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 8788 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 8836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 8788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:51,601 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 346 Invalid, 8836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 8788 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 21:09:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-04-06 21:09:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2022-04-06 21:09:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2101 states have (on average 1.0999524036173252) internal successors, (2311), 2257 states have internal predecessors, (2311), 83 states have call successors, (83), 5 states have call predecessors, (83), 159 states have return successors, (160), 81 states have call predecessors, (160), 81 states have call successors, (160) [2022-04-06 21:09:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 2554 transitions. [2022-04-06 21:09:53,553 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 2554 transitions. Word has length 69 [2022-04-06 21:09:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:53,553 INFO L478 AbstractCegarLoop]: Abstraction has 2344 states and 2554 transitions. [2022-04-06 21:09:53,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 2554 transitions. [2022-04-06 21:09:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:09:53,579 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:53,579 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:53,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:53,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:53,796 INFO L403 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1400185555, now seen corresponding path program 313 times [2022-04-06 21:09:53,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:53,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1021126068] [2022-04-06 21:09:53,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:53,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:53,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1400185555, now seen corresponding path program 314 times [2022-04-06 21:09:53,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:53,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769180550] [2022-04-06 21:09:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:53,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:53,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:53,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:09:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:09:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:09:54,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769180550] [2022-04-06 21:09:54,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769180550] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462665710] [2022-04-06 21:09:54,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:09:54,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:54,445 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:09:54,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-04-06 21:09:54,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:09:54,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:09:54,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:09:55,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:09:55,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462665710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:55,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:55,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 57 [2022-04-06 21:09:55,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:55,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1021126068] [2022-04-06 21:09:55,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1021126068] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:55,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:55,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:09:55,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369426333] [2022-04-06 21:09:55,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:55,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:09:55,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:09:55,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:09:55,520 INFO L87 Difference]: Start difference. First operand 2344 states and 2554 transitions. Second operand has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:09:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:59,866 INFO L93 Difference]: Finished difference Result 2350 states and 2559 transitions. [2022-04-06 21:09:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:09:59,866 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-06 21:09:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:59,881 INFO L225 Difference]: With dead ends: 2350 [2022-04-06 21:09:59,881 INFO L226 Difference]: Without dead ends: 2322 [2022-04-06 21:09:59,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=354, Invalid=9152, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 21:09:59,922 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7180 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 7226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 7180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:59,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 316 Invalid, 7226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 7180 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 21:09:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-04-06 21:10:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2322. [2022-04-06 21:10:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2082 states have (on average 1.0999039385206533) internal successors, (2290), 2236 states have internal predecessors, (2290), 82 states have call successors, (82), 5 states have call predecessors, (82), 157 states have return successors, (158), 80 states have call predecessors, (158), 80 states have call successors, (158) [2022-04-06 21:10:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 2530 transitions. [2022-04-06 21:10:01,855 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 2530 transitions. Word has length 69 [2022-04-06 21:10:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:01,855 INFO L478 AbstractCegarLoop]: Abstraction has 2322 states and 2530 transitions. [2022-04-06 21:10:01,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 2530 transitions. [2022-04-06 21:10:01,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:10:01,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:01,881 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:01,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-04-06 21:10:02,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-04-06 21:10:02,098 INFO L403 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash -788516243, now seen corresponding path program 315 times [2022-04-06 21:10:02,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:02,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [152853288] [2022-04-06 21:10:02,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:02,099 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash -788516243, now seen corresponding path program 316 times [2022-04-06 21:10:02,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:02,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158505932] [2022-04-06 21:10:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:02,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:02,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:10:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:02,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:10:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:10:02,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:02,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158505932] [2022-04-06 21:10:02,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158505932] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:02,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364562464] [2022-04-06 21:10:02,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:10:02,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:02,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:02,822 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:10:02,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-04-06 21:10:03,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:10:03,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:10:03,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:10:03,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:10:04,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364562464] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:04,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:04,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 57 [2022-04-06 21:10:04,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:04,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [152853288] [2022-04-06 21:10:04,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [152853288] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:04,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:04,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:10:04,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624065729] [2022-04-06 21:10:04,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:04,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:10:04,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:10:04,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3051, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:10:04,166 INFO L87 Difference]: Start difference. First operand 2322 states and 2530 transitions. Second operand has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:07,615 INFO L93 Difference]: Finished difference Result 2328 states and 2535 transitions. [2022-04-06 21:10:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:10:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-06 21:10:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:07,629 INFO L225 Difference]: With dead ends: 2328 [2022-04-06 21:10:07,629 INFO L226 Difference]: Without dead ends: 2298 [2022-04-06 21:10:07,680 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=356, Invalid=8764, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 21:10:07,680 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 173 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 5692 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 5736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:07,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 286 Invalid, 5736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5692 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:10:07,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-04-06 21:10:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2298. [2022-04-06 21:10:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2061 states have (on average 1.0999514798641437) internal successors, (2267), 2213 states have internal predecessors, (2267), 81 states have call successors, (81), 5 states have call predecessors, (81), 155 states have return successors, (156), 79 states have call predecessors, (156), 79 states have call successors, (156) [2022-04-06 21:10:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 2504 transitions. [2022-04-06 21:10:09,365 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 2504 transitions. Word has length 69 [2022-04-06 21:10:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:09,365 INFO L478 AbstractCegarLoop]: Abstraction has 2298 states and 2504 transitions. [2022-04-06 21:10:09,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 2504 transitions. [2022-04-06 21:10:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:10:09,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:09,390 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:09,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-04-06 21:10:09,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:09,598 INFO L403 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:09,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1006673197, now seen corresponding path program 317 times [2022-04-06 21:10:09,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:09,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60007971] [2022-04-06 21:10:09,599 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:09,599 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:09,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1006673197, now seen corresponding path program 318 times [2022-04-06 21:10:09,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:09,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750384504] [2022-04-06 21:10:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:09,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:09,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:09,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:10:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:09,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:10:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:10:10,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:10,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750384504] [2022-04-06 21:10:10,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750384504] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:10,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231285353] [2022-04-06 21:10:10,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:10:10,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:10,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:10,256 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:10:10,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-04-06 21:10:10,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:10:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:10,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:10:10,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:10:11,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:10:11,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231285353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:11,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:11,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 57 [2022-04-06 21:10:11,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:11,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60007971] [2022-04-06 21:10:11,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60007971] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:11,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:11,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:10:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266553154] [2022-04-06 21:10:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:11,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:10:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:10:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3047, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:10:11,436 INFO L87 Difference]: Start difference. First operand 2298 states and 2504 transitions. Second operand has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:14,977 INFO L93 Difference]: Finished difference Result 2304 states and 2509 transitions. [2022-04-06 21:10:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:10:14,977 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-06 21:10:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:14,991 INFO L225 Difference]: With dead ends: 2304 [2022-04-06 21:10:14,991 INFO L226 Difference]: Without dead ends: 2272 [2022-04-06 21:10:15,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=358, Invalid=8384, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 21:10:15,030 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:15,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 256 Invalid, 4366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4324 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:10:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2022-04-06 21:10:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2272. [2022-04-06 21:10:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2038 states have (on average 1.100098135426889) internal successors, (2242), 2188 states have internal predecessors, (2242), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (154), 78 states have call predecessors, (154), 78 states have call successors, (154) [2022-04-06 21:10:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2476 transitions. [2022-04-06 21:10:16,721 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2476 transitions. Word has length 69 [2022-04-06 21:10:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:16,722 INFO L478 AbstractCegarLoop]: Abstraction has 2272 states and 2476 transitions. [2022-04-06 21:10:16,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2476 transitions. [2022-04-06 21:10:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:10:16,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:16,750 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:16,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-04-06 21:10:16,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:16,963 INFO L403 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash -562072979, now seen corresponding path program 319 times [2022-04-06 21:10:16,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:16,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1834098734] [2022-04-06 21:10:16,964 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:16,964 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash -562072979, now seen corresponding path program 320 times [2022-04-06 21:10:16,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:16,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113191027] [2022-04-06 21:10:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:16,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:17,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:10:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:17,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:10:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:10:17,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113191027] [2022-04-06 21:10:17,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113191027] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372968196] [2022-04-06 21:10:17,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:10:17,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:17,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:17,493 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:10:17,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-04-06 21:10:17,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:10:17,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:17,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:10:17,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:10:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:10:18,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372968196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:18,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:18,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 57 [2022-04-06 21:10:18,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1834098734] [2022-04-06 21:10:18,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1834098734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:18,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:18,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:10:18,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74779635] [2022-04-06 21:10:18,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:18,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:10:18,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:10:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:10:18,510 INFO L87 Difference]: Start difference. First operand 2272 states and 2476 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:21,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:21,138 INFO L93 Difference]: Finished difference Result 2278 states and 2481 transitions. [2022-04-06 21:10:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:10:21,139 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-06 21:10:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:21,152 INFO L225 Difference]: With dead ends: 2278 [2022-04-06 21:10:21,152 INFO L226 Difference]: Without dead ends: 2244 [2022-04-06 21:10:21,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=360, Invalid=8012, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 21:10:21,242 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3076 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:21,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 226 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3076 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:10:21,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-04-06 21:10:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2022-04-06 21:10:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2013 states have (on average 1.100347739692002) internal successors, (2215), 2161 states have internal predecessors, (2215), 79 states have call successors, (79), 5 states have call predecessors, (79), 151 states have return successors, (152), 77 states have call predecessors, (152), 77 states have call successors, (152) [2022-04-06 21:10:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2446 transitions. [2022-04-06 21:10:22,856 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2446 transitions. Word has length 69 [2022-04-06 21:10:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:22,856 INFO L478 AbstractCegarLoop]: Abstraction has 2244 states and 2446 transitions. [2022-04-06 21:10:22,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2446 transitions. [2022-04-06 21:10:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:10:22,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:22,883 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:22,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-04-06 21:10:23,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-04-06 21:10:23,087 INFO L403 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:23,087 INFO L85 PathProgramCache]: Analyzing trace with hash -192127699, now seen corresponding path program 321 times [2022-04-06 21:10:23,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:23,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [567835585] [2022-04-06 21:10:23,088 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:23,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash -192127699, now seen corresponding path program 322 times [2022-04-06 21:10:23,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:23,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462679696] [2022-04-06 21:10:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:23,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:23,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:23,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:10:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:23,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:10:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 21:10:23,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:23,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462679696] [2022-04-06 21:10:23,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462679696] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:23,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273636898] [2022-04-06 21:10:23,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:10:23,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:23,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:23,583 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:10:23,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-04-06 21:10:23,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:10:23,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:10:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 21:10:24,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 21:10:24,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273636898] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:24,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:24,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 57 [2022-04-06 21:10:24,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:24,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [567835585] [2022-04-06 21:10:24,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [567835585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:24,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:24,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:10:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307988679] [2022-04-06 21:10:24,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:24,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:10:24,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:10:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3039, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:10:24,978 INFO L87 Difference]: Start difference. First operand 2244 states and 2446 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:27,700 INFO L93 Difference]: Finished difference Result 2262 states and 2467 transitions. [2022-04-06 21:10:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:10:27,701 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-06 21:10:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:27,733 INFO L225 Difference]: With dead ends: 2262 [2022-04-06 21:10:27,733 INFO L226 Difference]: Without dead ends: 2256 [2022-04-06 21:10:27,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=362, Invalid=7648, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:10:27,936 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:27,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 193 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1907 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:10:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-04-06 21:10:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2254. [2022-04-06 21:10:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2020 states have (on average 1.100990099009901) internal successors, (2224), 2170 states have internal predecessors, (2224), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (155), 78 states have call predecessors, (155), 78 states have call successors, (155) [2022-04-06 21:10:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2459 transitions. [2022-04-06 21:10:29,663 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2459 transitions. Word has length 69 [2022-04-06 21:10:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:29,663 INFO L478 AbstractCegarLoop]: Abstraction has 2254 states and 2459 transitions. [2022-04-06 21:10:29,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2459 transitions. [2022-04-06 21:10:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 21:10:29,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:29,687 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:29,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-04-06 21:10:29,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:29,903 INFO L403 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash -427401652, now seen corresponding path program 323 times [2022-04-06 21:10:29,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:29,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2052982431] [2022-04-06 21:10:29,904 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:29,904 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash -427401652, now seen corresponding path program 324 times [2022-04-06 21:10:29,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:29,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263857226] [2022-04-06 21:10:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:29,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:29,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:29,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:10:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:30,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:10:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:10:30,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:30,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263857226] [2022-04-06 21:10:30,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263857226] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:30,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576947025] [2022-04-06 21:10:30,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:10:30,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:30,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:30,679 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:10:30,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-04-06 21:10:30,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 21:10:30,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:30,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 21:10:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:10:32,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:10:34,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576947025] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:34,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:34,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 115 [2022-04-06 21:10:34,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:34,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2052982431] [2022-04-06 21:10:34,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2052982431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:34,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:34,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:10:34,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317740597] [2022-04-06 21:10:34,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:34,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:10:34,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:10:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=12720, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 21:10:34,596 INFO L87 Difference]: Start difference. First operand 2254 states and 2459 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:41,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:41,083 INFO L93 Difference]: Finished difference Result 2462 states and 2700 transitions. [2022-04-06 21:10:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:10:41,084 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-04-06 21:10:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:41,234 INFO L225 Difference]: With dead ends: 2462 [2022-04-06 21:10:41,234 INFO L226 Difference]: Without dead ends: 2448 [2022-04-06 21:10:41,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3422 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=658, Invalid=22904, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 21:10:41,291 INFO L913 BasicCegarLoop]: 196 mSDtfsCounter, 399 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 11882 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 11926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 11882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:41,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 398 Invalid, 11926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 11882 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 21:10:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-04-06 21:10:43,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2439. [2022-04-06 21:10:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2184 states have (on average 1.1007326007326008) internal successors, (2404), 2348 states have internal predecessors, (2404), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (176), 85 states have call predecessors, (176), 85 states have call successors, (176) [2022-04-06 21:10:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 2667 transitions. [2022-04-06 21:10:43,282 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 2667 transitions. Word has length 70 [2022-04-06 21:10:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:43,282 INFO L478 AbstractCegarLoop]: Abstraction has 2439 states and 2667 transitions. [2022-04-06 21:10:43,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 2667 transitions. [2022-04-06 21:10:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 21:10:43,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:43,307 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:43,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-04-06 21:10:43,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-04-06 21:10:43,523 INFO L403 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:43,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1235202671, now seen corresponding path program 325 times [2022-04-06 21:10:43,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:43,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168751308] [2022-04-06 21:10:43,524 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:43,524 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:43,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1235202671, now seen corresponding path program 326 times [2022-04-06 21:10:43,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:43,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267743447] [2022-04-06 21:10:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:43,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:43,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:43,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:10:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:43,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:10:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:10:44,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:44,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267743447] [2022-04-06 21:10:44,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267743447] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:44,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202451545] [2022-04-06 21:10:44,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:10:44,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:44,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:44,451 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:10:44,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-04-06 21:10:44,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:10:44,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:44,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 21:10:44,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:10:46,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:10:48,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202451545] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:48,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:48,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 115 [2022-04-06 21:10:48,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:48,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168751308] [2022-04-06 21:10:48,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168751308] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:48,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:48,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:10:48,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454842310] [2022-04-06 21:10:48,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:48,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:10:48,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:10:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=12720, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 21:10:48,582 INFO L87 Difference]: Start difference. First operand 2439 states and 2667 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:55,304 INFO L93 Difference]: Finished difference Result 2454 states and 2682 transitions. [2022-04-06 21:10:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:10:55,304 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-04-06 21:10:55,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:55,320 INFO L225 Difference]: With dead ends: 2454 [2022-04-06 21:10:55,320 INFO L226 Difference]: Without dead ends: 2442 [2022-04-06 21:10:55,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3443 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=658, Invalid=22904, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 21:10:55,365 INFO L913 BasicCegarLoop]: 198 mSDtfsCounter, 422 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 11961 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 12004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 11961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:55,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 400 Invalid, 12004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 11961 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 21:10:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2022-04-06 21:10:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2022-04-06 21:10:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2185 states have (on average 1.1006864988558351) internal successors, (2405), 2349 states have internal predecessors, (2405), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (168), 85 states have call predecessors, (168), 85 states have call successors, (168) [2022-04-06 21:10:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 2660 transitions. [2022-04-06 21:10:57,380 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 2660 transitions. Word has length 70 [2022-04-06 21:10:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:57,380 INFO L478 AbstractCegarLoop]: Abstraction has 2440 states and 2660 transitions. [2022-04-06 21:10:57,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:10:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 2660 transitions. [2022-04-06 21:10:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 21:10:57,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:57,408 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:57,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-04-06 21:10:57,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:57,611 INFO L403 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash -311854515, now seen corresponding path program 327 times [2022-04-06 21:10:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:57,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1242140546] [2022-04-06 21:10:57,612 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:57,612 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash -311854515, now seen corresponding path program 328 times [2022-04-06 21:10:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376410198] [2022-04-06 21:10:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:57,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:57,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:10:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:57,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:10:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:10:57,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:57,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376410198] [2022-04-06 21:10:57,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376410198] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:57,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719679817] [2022-04-06 21:10:57,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:10:57,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:57,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:57,777 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:10:57,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-04-06 21:10:57,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:10:57,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:57,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:10:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:10:58,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:10:58,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719679817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:58,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:58,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-04-06 21:10:58,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:58,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1242140546] [2022-04-06 21:10:58,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1242140546] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:58,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:58,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:10:58,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674752536] [2022-04-06 21:10:58,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:58,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:10:58,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:10:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:10:58,293 INFO L87 Difference]: Start difference. First operand 2440 states and 2660 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:11:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:01,151 INFO L93 Difference]: Finished difference Result 2790 states and 3065 transitions. [2022-04-06 21:11:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 21:11:01,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 70 [2022-04-06 21:11:01,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:01,170 INFO L225 Difference]: With dead ends: 2790 [2022-04-06 21:11:01,170 INFO L226 Difference]: Without dead ends: 2712 [2022-04-06 21:11:01,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2473, Invalid=7033, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 21:11:01,264 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 146 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:01,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 96 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:11:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2022-04-06 21:11:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2658. [2022-04-06 21:11:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2403 states have (on average 1.0994590095713692) internal successors, (2642), 2567 states have internal predecessors, (2642), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (168), 85 states have call predecessors, (168), 85 states have call successors, (168) [2022-04-06 21:11:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 2897 transitions. [2022-04-06 21:11:03,557 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 2897 transitions. Word has length 70 [2022-04-06 21:11:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:03,558 INFO L478 AbstractCegarLoop]: Abstraction has 2658 states and 2897 transitions. [2022-04-06 21:11:03,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:11:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 2897 transitions. [2022-04-06 21:11:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 21:11:03,594 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:03,594 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:03,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-04-06 21:11:03,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:03,797 INFO L403 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1401146866, now seen corresponding path program 329 times [2022-04-06 21:11:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:03,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2143712461] [2022-04-06 21:11:03,798 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:03,798 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:03,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1401146866, now seen corresponding path program 330 times [2022-04-06 21:11:03,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:03,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21899108] [2022-04-06 21:11:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:03,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:03,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:03,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:11:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:11:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:11:03,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21899108] [2022-04-06 21:11:03,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21899108] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212378726] [2022-04-06 21:11:03,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:11:03,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:03,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:03,987 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:11:03,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-04-06 21:11:04,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 21:11:04,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:04,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:11:04,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:11:04,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 21:11:04,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212378726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:04,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:04,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-04-06 21:11:04,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:04,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2143712461] [2022-04-06 21:11:04,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2143712461] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:04,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:04,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:11:04,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804382902] [2022-04-06 21:11:04,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:04,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:11:04,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:04,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:11:04,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:11:04,577 INFO L87 Difference]: Start difference. First operand 2658 states and 2897 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:07,721 INFO L93 Difference]: Finished difference Result 4392 states and 4750 transitions. [2022-04-06 21:11:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 21:11:07,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-04-06 21:11:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:08,043 INFO L225 Difference]: With dead ends: 4392 [2022-04-06 21:11:08,043 INFO L226 Difference]: Without dead ends: 2930 [2022-04-06 21:11:08,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2473, Invalid=7033, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 21:11:08,109 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 145 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:08,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 87 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:11:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2022-04-06 21:11:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2876. [2022-04-06 21:11:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2621 states have (on average 1.098435711560473) internal successors, (2879), 2785 states have internal predecessors, (2879), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (168), 85 states have call predecessors, (168), 85 states have call successors, (168) [2022-04-06 21:11:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3134 transitions. [2022-04-06 21:11:10,405 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3134 transitions. Word has length 70 [2022-04-06 21:11:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:10,405 INFO L478 AbstractCegarLoop]: Abstraction has 2876 states and 3134 transitions. [2022-04-06 21:11:10,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3134 transitions. [2022-04-06 21:11:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:11:10,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:10,445 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:10,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-04-06 21:11:10,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:10,659 INFO L403 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:10,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1382895286, now seen corresponding path program 331 times [2022-04-06 21:11:10,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:10,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1462514051] [2022-04-06 21:11:10,660 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:10,660 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1382895286, now seen corresponding path program 332 times [2022-04-06 21:11:10,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:10,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728627349] [2022-04-06 21:11:10,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:10,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:10,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:10,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:11:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:11,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:11:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:11:11,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:11,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728627349] [2022-04-06 21:11:11,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728627349] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:11,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62438588] [2022-04-06 21:11:11,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:11:11,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:11,704 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:11:11,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-04-06 21:11:11,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:11:11,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:11,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 21:11:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:11:12,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:11:12,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62438588] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:12,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:12,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 59 [2022-04-06 21:11:12,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:12,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1462514051] [2022-04-06 21:11:12,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1462514051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:12,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:12,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 21:11:12,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873861945] [2022-04-06 21:11:12,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:12,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 21:11:12,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 21:11:12,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3297, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:11:12,673 INFO L87 Difference]: Start difference. First operand 2876 states and 3134 transitions. Second operand has 53 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 49 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:19,701 INFO L93 Difference]: Finished difference Result 3108 states and 3389 transitions. [2022-04-06 21:11:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 21:11:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 49 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:11:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:19,766 INFO L225 Difference]: With dead ends: 3108 [2022-04-06 21:11:19,767 INFO L226 Difference]: Without dead ends: 3102 [2022-04-06 21:11:19,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=358, Invalid=11632, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 21:11:19,832 INFO L913 BasicCegarLoop]: 201 mSDtfsCounter, 444 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 15530 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 15606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 15530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:19,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 453 Invalid, 15606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 15530 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 21:11:19,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2022-04-06 21:11:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 2892. [2022-04-06 21:11:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2634 states have (on average 1.0987091875474564) internal successors, (2894), 2800 states have internal predecessors, (2894), 88 states have call successors, (88), 5 states have call predecessors, (88), 169 states have return successors, (171), 86 states have call predecessors, (171), 86 states have call successors, (171) [2022-04-06 21:11:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 3153 transitions. [2022-04-06 21:11:22,309 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 3153 transitions. Word has length 71 [2022-04-06 21:11:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:22,309 INFO L478 AbstractCegarLoop]: Abstraction has 2892 states and 3153 transitions. [2022-04-06 21:11:22,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 49 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 3153 transitions. [2022-04-06 21:11:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:11:22,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:22,351 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:22,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-04-06 21:11:22,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:22,563 INFO L403 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -704284630, now seen corresponding path program 333 times [2022-04-06 21:11:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:22,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [619367825] [2022-04-06 21:11:22,564 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:22,564 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -704284630, now seen corresponding path program 334 times [2022-04-06 21:11:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:22,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802813844] [2022-04-06 21:11:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:22,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:22,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:11:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:22,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:11:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:11:23,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802813844] [2022-04-06 21:11:23,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802813844] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075899408] [2022-04-06 21:11:23,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:11:23,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:23,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:23,437 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:11:23,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-04-06 21:11:23,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:11:23,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:23,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 21:11:23,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:11:24,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:11:24,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075899408] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:24,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:24,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 59 [2022-04-06 21:11:24,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:24,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [619367825] [2022-04-06 21:11:24,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [619367825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:24,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:24,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 21:11:24,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036159766] [2022-04-06 21:11:24,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:24,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 21:11:24,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 21:11:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3293, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:11:24,373 INFO L87 Difference]: Start difference. First operand 2892 states and 3153 transitions. Second operand has 51 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 47 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:31,041 INFO L93 Difference]: Finished difference Result 2898 states and 3158 transitions. [2022-04-06 21:11:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 21:11:31,041 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 47 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:11:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:31,061 INFO L225 Difference]: With dead ends: 2898 [2022-04-06 21:11:31,062 INFO L226 Difference]: Without dead ends: 2876 [2022-04-06 21:11:31,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=360, Invalid=11196, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 21:11:31,120 INFO L913 BasicCegarLoop]: 181 mSDtfsCounter, 353 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 13478 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 13533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 13478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:31,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 423 Invalid, 13533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 13478 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 21:11:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2022-04-06 21:11:33,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2876. [2022-04-06 21:11:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2621 states have (on average 1.098435711560473) internal successors, (2879), 2785 states have internal predecessors, (2879), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (169), 85 states have call predecessors, (169), 85 states have call successors, (169) [2022-04-06 21:11:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3135 transitions. [2022-04-06 21:11:33,596 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3135 transitions. Word has length 71 [2022-04-06 21:11:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:33,596 INFO L478 AbstractCegarLoop]: Abstraction has 2876 states and 3135 transitions. [2022-04-06 21:11:33,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 47 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3135 transitions. [2022-04-06 21:11:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:11:33,635 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:33,635 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:33,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-04-06 21:11:33,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-04-06 21:11:33,838 INFO L403 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:33,838 INFO L85 PathProgramCache]: Analyzing trace with hash 636513738, now seen corresponding path program 335 times [2022-04-06 21:11:33,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:33,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635301274] [2022-04-06 21:11:33,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:33,839 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash 636513738, now seen corresponding path program 336 times [2022-04-06 21:11:33,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:33,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713024409] [2022-04-06 21:11:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:33,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:33,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:33,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:11:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:34,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:11:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:11:34,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:34,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713024409] [2022-04-06 21:11:34,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713024409] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:34,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778189467] [2022-04-06 21:11:34,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:11:34,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:34,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:34,663 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:11:34,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-04-06 21:11:34,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 21:11:34,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:34,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 21:11:34,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:11:35,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:11:35,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778189467] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:35,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:35,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 59 [2022-04-06 21:11:35,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:35,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635301274] [2022-04-06 21:11:35,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635301274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:35,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:35,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 21:11:35,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757013883] [2022-04-06 21:11:35,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:35,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 21:11:35,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:35,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 21:11:35,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=3289, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:11:35,880 INFO L87 Difference]: Start difference. First operand 2876 states and 3135 transitions. Second operand has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 45 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:41,887 INFO L93 Difference]: Finished difference Result 2882 states and 3140 transitions. [2022-04-06 21:11:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 21:11:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 45 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:11:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:41,905 INFO L225 Difference]: With dead ends: 2882 [2022-04-06 21:11:41,905 INFO L226 Difference]: Without dead ends: 2858 [2022-04-06 21:11:41,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 128 SyntacticMatches, 9 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=362, Invalid=10768, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 21:11:41,997 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 314 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 11546 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 11600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 11546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:41,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 393 Invalid, 11600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 11546 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 21:11:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2022-04-06 21:11:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2858. [2022-04-06 21:11:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2606 states have (on average 1.0982348426707598) internal successors, (2862), 2768 states have internal predecessors, (2862), 86 states have call successors, (86), 5 states have call predecessors, (86), 165 states have return successors, (167), 84 states have call predecessors, (167), 84 states have call successors, (167) [2022-04-06 21:11:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 3115 transitions. [2022-04-06 21:11:44,276 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 3115 transitions. Word has length 71 [2022-04-06 21:11:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:44,277 INFO L478 AbstractCegarLoop]: Abstraction has 2858 states and 3115 transitions. [2022-04-06 21:11:44,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 45 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 3115 transitions. [2022-04-06 21:11:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:11:44,312 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:44,312 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:44,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-04-06 21:11:44,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:44,527 INFO L403 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:44,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1660863574, now seen corresponding path program 337 times [2022-04-06 21:11:44,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:44,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [436202590] [2022-04-06 21:11:44,528 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:44,528 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1660863574, now seen corresponding path program 338 times [2022-04-06 21:11:44,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:44,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533754721] [2022-04-06 21:11:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:44,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:44,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:44,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:11:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:44,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:11:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:11:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:45,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533754721] [2022-04-06 21:11:45,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533754721] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:45,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079458850] [2022-04-06 21:11:45,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:11:45,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:45,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:45,287 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:11:45,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-04-06 21:11:45,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:11:45,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 21:11:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:11:46,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:11:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079458850] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:46,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:46,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 59 [2022-04-06 21:11:46,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [436202590] [2022-04-06 21:11:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [436202590] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:46,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:46,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 21:11:46,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663951686] [2022-04-06 21:11:46,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:46,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 21:11:46,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 21:11:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3285, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:11:46,537 INFO L87 Difference]: Start difference. First operand 2858 states and 3115 transitions. Second operand has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:51,840 INFO L93 Difference]: Finished difference Result 2864 states and 3120 transitions. [2022-04-06 21:11:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:11:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:11:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:51,859 INFO L225 Difference]: With dead ends: 2864 [2022-04-06 21:11:51,860 INFO L226 Difference]: Without dead ends: 2838 [2022-04-06 21:11:51,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 126 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=364, Invalid=10348, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 21:11:51,923 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 275 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 9734 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 9786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 9734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:51,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 363 Invalid, 9786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 9734 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 21:11:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2022-04-06 21:11:54,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2838. [2022-04-06 21:11:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2589 states have (on average 1.0981073773657783) internal successors, (2843), 2749 states have internal predecessors, (2843), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (165), 83 states have call predecessors, (165), 83 states have call successors, (165) [2022-04-06 21:11:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 3093 transitions. [2022-04-06 21:11:54,301 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 3093 transitions. Word has length 71 [2022-04-06 21:11:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:54,301 INFO L478 AbstractCegarLoop]: Abstraction has 2838 states and 3093 transitions. [2022-04-06 21:11:54,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 43 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:11:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 3093 transitions. [2022-04-06 21:11:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:11:54,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:54,334 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:54,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-04-06 21:11:54,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-04-06 21:11:54,551 INFO L403 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash 382544458, now seen corresponding path program 339 times [2022-04-06 21:11:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925827599] [2022-04-06 21:11:54,552 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:54,552 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 382544458, now seen corresponding path program 340 times [2022-04-06 21:11:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841366569] [2022-04-06 21:11:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:54,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:54,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:11:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:54,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:11:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:11:55,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:55,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841366569] [2022-04-06 21:11:55,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841366569] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:55,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426252541] [2022-04-06 21:11:55,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:11:55,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:55,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:55,390 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:11:55,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-04-06 21:11:55,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:11:55,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 21:11:55,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:11:56,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:11:56,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426252541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:56,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:56,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 59 [2022-04-06 21:11:56,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925827599] [2022-04-06 21:11:56,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925827599] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:56,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:56,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:11:56,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973269495] [2022-04-06 21:11:56,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:56,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:11:56,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:56,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:11:56,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3281, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:11:56,671 INFO L87 Difference]: Start difference. First operand 2838 states and 3093 transitions. Second operand has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:01,436 INFO L93 Difference]: Finished difference Result 2844 states and 3098 transitions. [2022-04-06 21:12:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:12:01,437 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:12:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:01,454 INFO L225 Difference]: With dead ends: 2844 [2022-04-06 21:12:01,454 INFO L226 Difference]: Without dead ends: 2816 [2022-04-06 21:12:01,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=366, Invalid=9936, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 21:12:01,515 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 236 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 8042 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 8092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 8042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:01,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 333 Invalid, 8092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 8042 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 21:12:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2022-04-06 21:12:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2816. [2022-04-06 21:12:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2570 states have (on average 1.0980544747081713) internal successors, (2822), 2728 states have internal predecessors, (2822), 84 states have call successors, (84), 5 states have call predecessors, (84), 161 states have return successors, (163), 82 states have call predecessors, (163), 82 states have call successors, (163) [2022-04-06 21:12:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 3069 transitions. [2022-04-06 21:12:03,966 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 3069 transitions. Word has length 71 [2022-04-06 21:12:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:03,966 INFO L478 AbstractCegarLoop]: Abstraction has 2816 states and 3069 transitions. [2022-04-06 21:12:03,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 3069 transitions. [2022-04-06 21:12:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:12:04,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:04,002 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:04,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-04-06 21:12:04,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-04-06 21:12:04,220 INFO L403 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1528430378, now seen corresponding path program 341 times [2022-04-06 21:12:04,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:04,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1696487158] [2022-04-06 21:12:04,221 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:04,221 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1528430378, now seen corresponding path program 342 times [2022-04-06 21:12:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:04,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978138629] [2022-04-06 21:12:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:04,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:12:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:04,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:12:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:12:05,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:05,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978138629] [2022-04-06 21:12:05,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978138629] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:05,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564468159] [2022-04-06 21:12:05,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:12:05,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:05,008 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:05,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-04-06 21:12:05,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:12:05,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:12:05,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:12:06,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 21:12:06,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564468159] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:06,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:06,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 59 [2022-04-06 21:12:06,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:06,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1696487158] [2022-04-06 21:12:06,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1696487158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:06,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:06,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:12:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360414789] [2022-04-06 21:12:06,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:06,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:12:06,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:12:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3277, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:12:06,272 INFO L87 Difference]: Start difference. First operand 2816 states and 3069 transitions. Second operand has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:10,966 INFO L93 Difference]: Finished difference Result 2822 states and 3074 transitions. [2022-04-06 21:12:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:12:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:12:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:10,984 INFO L225 Difference]: With dead ends: 2822 [2022-04-06 21:12:10,985 INFO L226 Difference]: Without dead ends: 2792 [2022-04-06 21:12:11,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=368, Invalid=9532, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 21:12:11,049 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6470 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 6518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:11,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 303 Invalid, 6518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6470 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 21:12:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-04-06 21:12:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2792. [2022-04-06 21:12:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2549 states have (on average 1.0980776775205963) internal successors, (2799), 2705 states have internal predecessors, (2799), 83 states have call successors, (83), 5 states have call predecessors, (83), 159 states have return successors, (161), 81 states have call predecessors, (161), 81 states have call successors, (161) [2022-04-06 21:12:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3043 transitions. [2022-04-06 21:12:13,415 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3043 transitions. Word has length 71 [2022-04-06 21:12:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:13,416 INFO L478 AbstractCegarLoop]: Abstraction has 2792 states and 3043 transitions. [2022-04-06 21:12:13,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3043 transitions. [2022-04-06 21:12:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:12:13,446 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:13,446 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:13,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-04-06 21:12:13,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2022-04-06 21:12:13,662 INFO L403 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:13,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1393498422, now seen corresponding path program 343 times [2022-04-06 21:12:13,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:13,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2140480203] [2022-04-06 21:12:13,663 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:13,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:13,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1393498422, now seen corresponding path program 344 times [2022-04-06 21:12:13,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:13,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617163809] [2022-04-06 21:12:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:13,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:13,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:13,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:12:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:13,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:12:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:12:14,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:14,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617163809] [2022-04-06 21:12:14,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617163809] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:14,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476209190] [2022-04-06 21:12:14,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:12:14,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:14,385 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:14,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-04-06 21:12:14,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:12:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:12:14,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:12:15,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 21:12:15,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476209190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:15,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:15,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 59 [2022-04-06 21:12:15,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:15,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2140480203] [2022-04-06 21:12:15,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2140480203] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:15,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:15,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:12:15,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595704478] [2022-04-06 21:12:15,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:15,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:12:15,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:15,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:12:15,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3273, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:12:15,831 INFO L87 Difference]: Start difference. First operand 2792 states and 3043 transitions. Second operand has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:19,739 INFO L93 Difference]: Finished difference Result 2798 states and 3048 transitions. [2022-04-06 21:12:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:12:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:12:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:19,757 INFO L225 Difference]: With dead ends: 2798 [2022-04-06 21:12:19,758 INFO L226 Difference]: Without dead ends: 2766 [2022-04-06 21:12:19,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=370, Invalid=9136, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 21:12:19,816 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 5018 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 5064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:19,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 273 Invalid, 5064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5018 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:12:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-04-06 21:12:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2766. [2022-04-06 21:12:22,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2526 states have (on average 1.098178939034046) internal successors, (2774), 2680 states have internal predecessors, (2774), 82 states have call successors, (82), 5 states have call predecessors, (82), 157 states have return successors, (159), 80 states have call predecessors, (159), 80 states have call successors, (159) [2022-04-06 21:12:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3015 transitions. [2022-04-06 21:12:22,184 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3015 transitions. Word has length 71 [2022-04-06 21:12:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:22,184 INFO L478 AbstractCegarLoop]: Abstraction has 2766 states and 3015 transitions. [2022-04-06 21:12:22,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3015 transitions. [2022-04-06 21:12:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:12:22,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:22,221 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:22,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-04-06 21:12:22,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:22,435 INFO L403 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash 998752938, now seen corresponding path program 345 times [2022-04-06 21:12:22,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:22,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2145641345] [2022-04-06 21:12:22,436 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:22,436 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash 998752938, now seen corresponding path program 346 times [2022-04-06 21:12:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:22,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558916532] [2022-04-06 21:12:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:22,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:22,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:22,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:12:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:22,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:12:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:12:23,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558916532] [2022-04-06 21:12:23,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558916532] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975405770] [2022-04-06 21:12:23,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:12:23,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:23,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:23,118 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:23,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-04-06 21:12:23,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:12:23,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:23,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:12:23,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:12:24,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 21:12:24,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975405770] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:24,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:24,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 59 [2022-04-06 21:12:24,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:24,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2145641345] [2022-04-06 21:12:24,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2145641345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:24,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:24,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:12:24,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071215350] [2022-04-06 21:12:24,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:24,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:12:24,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:12:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3269, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:12:24,394 INFO L87 Difference]: Start difference. First operand 2766 states and 3015 transitions. Second operand has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:28,085 INFO L93 Difference]: Finished difference Result 2772 states and 3020 transitions. [2022-04-06 21:12:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:12:28,085 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:12:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:28,103 INFO L225 Difference]: With dead ends: 2772 [2022-04-06 21:12:28,103 INFO L226 Difference]: Without dead ends: 2738 [2022-04-06 21:12:28,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=372, Invalid=8748, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 21:12:28,201 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 120 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3583 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 3629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:28,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 240 Invalid, 3629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3583 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:12:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2022-04-06 21:12:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2738. [2022-04-06 21:12:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2501 states have (on average 1.098360655737705) internal successors, (2747), 2653 states have internal predecessors, (2747), 81 states have call successors, (81), 5 states have call predecessors, (81), 155 states have return successors, (157), 79 states have call predecessors, (157), 79 states have call successors, (157) [2022-04-06 21:12:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 2985 transitions. [2022-04-06 21:12:30,812 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 2985 transitions. Word has length 71 [2022-04-06 21:12:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:30,812 INFO L478 AbstractCegarLoop]: Abstraction has 2738 states and 2985 transitions. [2022-04-06 21:12:30,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 35 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 2985 transitions. [2022-04-06 21:12:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:12:30,852 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:30,852 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:30,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-04-06 21:12:31,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:31,057 INFO L403 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash -529301121, now seen corresponding path program 347 times [2022-04-06 21:12:31,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:31,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1895215018] [2022-04-06 21:12:31,058 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:31,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash -529301121, now seen corresponding path program 348 times [2022-04-06 21:12:31,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:31,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979918758] [2022-04-06 21:12:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:31,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:31,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:31,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:12:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:31,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 21:12:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 21:12:31,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:31,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979918758] [2022-04-06 21:12:31,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979918758] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737494686] [2022-04-06 21:12:31,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:12:31,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:31,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:31,550 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:31,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-04-06 21:12:31,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 21:12:31,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 21:12:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 21:12:32,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 21:12:33,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737494686] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:33,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:33,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 69 [2022-04-06 21:12:33,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:33,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1895215018] [2022-04-06 21:12:33,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1895215018] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:33,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:33,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:12:33,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452503968] [2022-04-06 21:12:33,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:33,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:12:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:12:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=4443, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 21:12:33,394 INFO L87 Difference]: Start difference. First operand 2738 states and 2985 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:37,390 INFO L93 Difference]: Finished difference Result 2890 states and 3171 transitions. [2022-04-06 21:12:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 21:12:37,391 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:12:37,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:37,738 INFO L225 Difference]: With dead ends: 2890 [2022-04-06 21:12:37,738 INFO L226 Difference]: Without dead ends: 2868 [2022-04-06 21:12:37,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=427, Invalid=8129, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 21:12:37,897 INFO L913 BasicCegarLoop]: 133 mSDtfsCounter, 281 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5250 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 5280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 5250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:37,897 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 265 Invalid, 5280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 5250 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:12:37,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2022-04-06 21:12:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2863. [2022-04-06 21:12:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2575 states have (on average 1.0951456310679613) internal successors, (2820), 2761 states have internal predecessors, (2820), 98 states have call successors, (98), 5 states have call predecessors, (98), 189 states have return successors, (208), 96 states have call predecessors, (208), 96 states have call successors, (208) [2022-04-06 21:12:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3126 transitions. [2022-04-06 21:12:40,428 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3126 transitions. Word has length 71 [2022-04-06 21:12:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:40,428 INFO L478 AbstractCegarLoop]: Abstraction has 2863 states and 3126 transitions. [2022-04-06 21:12:40,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3126 transitions. [2022-04-06 21:12:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:12:40,472 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:40,472 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:40,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-04-06 21:12:40,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-04-06 21:12:40,689 INFO L403 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2061262006, now seen corresponding path program 349 times [2022-04-06 21:12:40,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:40,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [796152376] [2022-04-06 21:12:40,690 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:40,690 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2061262006, now seen corresponding path program 350 times [2022-04-06 21:12:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557669165] [2022-04-06 21:12:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:40,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:40,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:40,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:12:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:40,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:12:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 21:12:41,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:41,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557669165] [2022-04-06 21:12:41,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557669165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:41,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874785221] [2022-04-06 21:12:41,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:12:41,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:41,348 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:41,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-04-06 21:12:41,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:12:41,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:41,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:12:41,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 21:12:42,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 21:12:42,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874785221] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:42,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:42,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 59 [2022-04-06 21:12:42,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:42,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [796152376] [2022-04-06 21:12:42,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [796152376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:42,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:42,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:12:42,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692901175] [2022-04-06 21:12:42,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:42,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:12:42,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:42,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:12:42,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3265, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:12:42,538 INFO L87 Difference]: Start difference. First operand 2863 states and 3126 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:45,861 INFO L93 Difference]: Finished difference Result 2881 states and 3148 transitions. [2022-04-06 21:12:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:12:45,861 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:12:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:45,903 INFO L225 Difference]: With dead ends: 2881 [2022-04-06 21:12:45,903 INFO L226 Difference]: Without dead ends: 2859 [2022-04-06 21:12:46,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=374, Invalid=8368, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 21:12:46,238 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2513 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:46,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 213 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:12:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2022-04-06 21:12:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2854. [2022-04-06 21:12:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2566 states have (on average 1.0958690568978955) internal successors, (2812), 2752 states have internal predecessors, (2812), 98 states have call successors, (98), 5 states have call predecessors, (98), 189 states have return successors, (208), 96 states have call predecessors, (208), 96 states have call successors, (208) [2022-04-06 21:12:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 3118 transitions. [2022-04-06 21:12:49,034 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 3118 transitions. Word has length 71 [2022-04-06 21:12:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:49,034 INFO L478 AbstractCegarLoop]: Abstraction has 2854 states and 3118 transitions. [2022-04-06 21:12:49,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 3118 transitions. [2022-04-06 21:12:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:12:49,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:49,083 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:49,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-04-06 21:12:49,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:49,296 INFO L403 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1706921413, now seen corresponding path program 351 times [2022-04-06 21:12:49,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:49,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689346822] [2022-04-06 21:12:49,297 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:49,297 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1706921413, now seen corresponding path program 352 times [2022-04-06 21:12:49,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:49,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574201864] [2022-04-06 21:12:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:49,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:49,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:12:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:49,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 21:12:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 21:12:49,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:49,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574201864] [2022-04-06 21:12:49,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574201864] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:49,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997234416] [2022-04-06 21:12:49,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:12:49,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:49,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:49,744 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:49,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-04-06 21:12:49,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:12:49,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:49,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 21:12:49,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 21:12:50,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 21:12:51,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997234416] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:51,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:51,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 69 [2022-04-06 21:12:51,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689346822] [2022-04-06 21:12:51,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689346822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:51,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:51,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:12:51,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611073494] [2022-04-06 21:12:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:51,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:12:51,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:12:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=4443, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 21:12:51,521 INFO L87 Difference]: Start difference. First operand 2854 states and 3118 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:55,510 INFO L93 Difference]: Finished difference Result 2868 states and 3131 transitions. [2022-04-06 21:12:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 21:12:55,510 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-06 21:12:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:55,530 INFO L225 Difference]: With dead ends: 2868 [2022-04-06 21:12:55,530 INFO L226 Difference]: Without dead ends: 2834 [2022-04-06 21:12:55,600 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=427, Invalid=8129, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 21:12:55,601 INFO L913 BasicCegarLoop]: 127 mSDtfsCounter, 290 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4707 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 4738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:55,601 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 249 Invalid, 4738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4707 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:12:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-04-06 21:12:58,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2832. [2022-04-06 21:12:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2544 states have (on average 1.0959119496855345) internal successors, (2788), 2730 states have internal predecessors, (2788), 98 states have call successors, (98), 5 states have call predecessors, (98), 189 states have return successors, (192), 96 states have call predecessors, (192), 96 states have call successors, (192) [2022-04-06 21:12:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3078 transitions. [2022-04-06 21:12:58,742 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3078 transitions. Word has length 71 [2022-04-06 21:12:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:58,742 INFO L478 AbstractCegarLoop]: Abstraction has 2832 states and 3078 transitions. [2022-04-06 21:12:58,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:12:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3078 transitions. [2022-04-06 21:12:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 21:12:58,778 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:58,778 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:58,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-04-06 21:12:58,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:58,995 INFO L403 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash -939553329, now seen corresponding path program 353 times [2022-04-06 21:12:58,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:58,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308865339] [2022-04-06 21:12:58,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:58,996 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:58,996 INFO L85 PathProgramCache]: Analyzing trace with hash -939553329, now seen corresponding path program 354 times [2022-04-06 21:12:58,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:58,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906622645] [2022-04-06 21:12:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:58,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:59,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:59,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:12:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:59,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:12:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:12:59,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906622645] [2022-04-06 21:12:59,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906622645] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390309350] [2022-04-06 21:12:59,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:12:59,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:59,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:59,863 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:59,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-04-06 21:13:00,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 21:13:00,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:00,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 21:13:00,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:13:01,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:13:03,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390309350] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:03,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:03,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 121 [2022-04-06 21:13:03,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:03,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308865339] [2022-04-06 21:13:03,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308865339] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:03,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:03,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:13:03,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714278996] [2022-04-06 21:13:03,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:03,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:13:03,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:03,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:13:03,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=14109, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 21:13:03,325 INFO L87 Difference]: Start difference. First operand 2832 states and 3078 transitions. Second operand has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 44 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:13:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:11,248 INFO L93 Difference]: Finished difference Result 3072 states and 3355 transitions. [2022-04-06 21:13:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:13:11,248 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 44 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 72 [2022-04-06 21:13:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:11,462 INFO L225 Difference]: With dead ends: 3072 [2022-04-06 21:13:11,462 INFO L226 Difference]: Without dead ends: 3058 [2022-04-06 21:13:11,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3802 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=693, Invalid=25389, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 21:13:11,623 INFO L913 BasicCegarLoop]: 206 mSDtfsCounter, 420 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 13148 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 13194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 13148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:11,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 418 Invalid, 13194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 13148 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 21:13:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-04-06 21:13:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 3049. [2022-04-06 21:13:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 2737 states have (on average 1.0957252466203873) internal successors, (2999), 2939 states have internal predecessors, (2999), 106 states have call successors, (106), 5 states have call predecessors, (106), 205 states have return successors, (216), 104 states have call predecessors, (216), 104 states have call successors, (216) [2022-04-06 21:13:14,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 3321 transitions. [2022-04-06 21:13:14,295 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 3321 transitions. Word has length 72 [2022-04-06 21:13:14,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:14,295 INFO L478 AbstractCegarLoop]: Abstraction has 3049 states and 3321 transitions. [2022-04-06 21:13:14,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 44 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:13:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 3321 transitions. [2022-04-06 21:13:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 21:13:14,335 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:14,336 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:14,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-04-06 21:13:14,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:14,552 INFO L403 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:14,552 INFO L85 PathProgramCache]: Analyzing trace with hash -938426868, now seen corresponding path program 355 times [2022-04-06 21:13:14,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:14,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1982002831] [2022-04-06 21:13:14,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:14,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash -938426868, now seen corresponding path program 356 times [2022-04-06 21:13:14,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:14,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750046426] [2022-04-06 21:13:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:14,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:14,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:14,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:13:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:14,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 21:13:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:13:15,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:15,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750046426] [2022-04-06 21:13:15,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750046426] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:15,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93876806] [2022-04-06 21:13:15,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:15,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:15,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:15,464 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:15,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-04-06 21:13:15,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:15,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:15,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 21:13:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:13:17,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:13:19,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93876806] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:19,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:19,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 121 [2022-04-06 21:13:19,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:19,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1982002831] [2022-04-06 21:13:19,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1982002831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:19,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:19,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:13:19,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114035171] [2022-04-06 21:13:19,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:19,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:13:19,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:13:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=14109, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 21:13:19,425 INFO L87 Difference]: Start difference. First operand 3049 states and 3321 transitions. Second operand has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 44 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:13:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:26,847 INFO L93 Difference]: Finished difference Result 3064 states and 3336 transitions. [2022-04-06 21:13:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:13:26,848 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 44 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 72 [2022-04-06 21:13:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:26,874 INFO L225 Difference]: With dead ends: 3064 [2022-04-06 21:13:26,874 INFO L226 Difference]: Without dead ends: 3052 [2022-04-06 21:13:26,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3824 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=693, Invalid=25389, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 21:13:26,945 INFO L913 BasicCegarLoop]: 208 mSDtfsCounter, 447 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 12920 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 12965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 12920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:26,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 415 Invalid, 12965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 12920 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 21:13:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2022-04-06 21:13:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 3050. [2022-04-06 21:13:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 2738 states have (on average 1.095690284879474) internal successors, (3000), 2940 states have internal predecessors, (3000), 106 states have call successors, (106), 5 states have call predecessors, (106), 205 states have return successors, (207), 104 states have call predecessors, (207), 104 states have call successors, (207) [2022-04-06 21:13:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 3313 transitions. [2022-04-06 21:13:30,219 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 3313 transitions. Word has length 72 [2022-04-06 21:13:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:30,219 INFO L478 AbstractCegarLoop]: Abstraction has 3050 states and 3313 transitions. [2022-04-06 21:13:30,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 44 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:13:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 3313 transitions. [2022-04-06 21:13:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 21:13:30,263 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:30,263 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:30,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-04-06 21:13:30,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:30,480 INFO L403 AbstractCegarLoop]: === Iteration 189 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1418377486, now seen corresponding path program 357 times [2022-04-06 21:13:30,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:30,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [134059779] [2022-04-06 21:13:30,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:30,481 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1418377486, now seen corresponding path program 358 times [2022-04-06 21:13:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:30,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134908150] [2022-04-06 21:13:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:30,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:30,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 21:13:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 21:13:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 21:13:30,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:30,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134908150] [2022-04-06 21:13:30,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134908150] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:30,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446665374] [2022-04-06 21:13:30,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:13:30,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:30,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:30,700 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:30,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-04-06 21:13:30,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:13:30,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:30,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:13:30,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 21:13:31,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 21:13:31,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446665374] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:31,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:31,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 34 [2022-04-06 21:13:31,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [134059779] [2022-04-06 21:13:31,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [134059779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:31,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:31,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 21:13:31,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833292066] [2022-04-06 21:13:31,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:31,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 21:13:31,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 21:13:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:13:31,248 INFO L87 Difference]: Start difference. First operand 3050 states and 3313 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:13:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:34,816 INFO L93 Difference]: Finished difference Result 4574 states and 4899 transitions. [2022-04-06 21:13:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 21:13:34,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 72 [2022-04-06 21:13:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted.